Страница 19 - гдз по физике 8-11 класс учебник, задачник Гельфгат, Генденштейн

Физика, 8-11 класс Учебник, задачник, авторы: Гельфгат Илья Маркович, Генденштейн Лев Элевич, Кирик Леонид Анатольевич, издательство Илекса, Москва, 2005

Авторы: Гельфгат И. М., Генденштейн Л. Э., Кирик Л. А.

Тип: Учебник, задачник

Издательство: Илекса

Год издания: 2005 - 2026

Цвет обложки: синий мужчина в красном, летит на черном шаре

ISBN: 978-5-89237-332-6

Cтраница 19

App\Models\BookPage {#1003 // resources/views/models/book_page/default.blade.php
  #connection: "mysql"
  #table: "book_pages"
  #primaryKey: "id"
  #keyType: "int"
  +incrementing: true
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  +exists: true
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  #attributes: array:21 [
    "id" => 1340370
    "created_at" => "2026-04-10 13:58:26"
    "updated_at" => null
    "field_page_start" => "19"
    "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/page-19"
    "field_display_title" => "19"
    "field_folder" => "1"
    "field_image_name" => "19"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1008
      #items: []
      #escapeWhenCastingToString: false
    }
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1016
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        0 => App\Models\Book {#1015
          #connection: "mysql"
          #table: "books"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: false
          #with: []
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          +exists: true
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          #escapeWhenCastingToString: false
          #attributes: array:50 [
            "id" => 5401
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_tree_default_status" => "tasks"
            "field_pages_status" => null
            "field_subject" => Illuminate\Database\Eloquent\Collection {#1020
              #items: array:1 [
                0 => App\Models\Term {#1017
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            }
            "field_class" => Illuminate\Database\Eloquent\Collection {#1023
              #items: array:4 [
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                  #connection: "mysql"
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                }
                1 => App\Models\Term {#1021
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
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                }
                2 => App\Models\Term {#1018
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                  #keyType: "int"
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                }
                3 => App\Models\Term {#1022
                  #connection: "mysql"
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                }
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            }
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            "field_author" => Illuminate\Database\Eloquent\Collection {#1025
              #items: array:3 [
                0 => App\Models\Term {#1038
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
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                  #original: array:12 [ …12]
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                }
                1 => App\Models\Term {#1039
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
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                  +preventsLazyLoading: false
                  #perPage: 15
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                }
                2 => App\Models\Term {#1040
                  #connection: "mysql"
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                }
              ]
              #escapeWhenCastingToString: false
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            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1035
              #items: []
              #escapeWhenCastingToString: false
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              #items: array:1 [
                0 => App\Models\Term {#1026
                  #connection: "mysql"
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            "field_country" => Illuminate\Database\Eloquent\Collection {#1029
              #items: array:1 [
                0 => App\Models\Term {#1034
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                }
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            "field_city" => Illuminate\Database\Eloquent\Collection {#1027
              #items: array:1 [
                0 => App\Models\Term {#1030
                  #connection: "mysql"
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                }
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            "field_series" => Illuminate\Database\Eloquent\Collection {#1028
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_umk" => Illuminate\Database\Eloquent\Collection {#1024
              #items: []
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            "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1041
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                  #connection: "mysql"
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            "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1045
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                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:21 [ …21]
                  #original: array:21 [ …21]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "book_page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
            "img" => array:1 [
              0 => array:5 [
                "name" => "19-1.jpg"
                "alt" => null
                "width" => "1526"
                "height" => 2459
                "path" => "/media/fizika_08/gelfgat-u/0-1/19-1.webp?ts=1756639063"
              ]
            ]
          ]
          #original: array:6 [
            "id" => 1518491
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1064}
            "book_page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
            "img" => array:1 [
              0 => array:5 [
                "name" => "19-1.jpg"
                "alt" => null
                "width" => "1526"
                "height" => 2459
                "path" => "/media/fizika_08/gelfgat-u/0-1/19-1.webp?ts=1756639063"
              ]
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "next" => Illuminate\Database\Eloquent\Collection {#4944
      #items: array:1 [
        0 => App\Models\BookPage {#4943
          #connection: "mysql"
          #table: "book_pages"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:21 [
            "id" => 1340371
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "20"
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/page-20"
            "field_display_title" => "20"
            "field_folder" => "1"
            "field_image_name" => "20"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#4960
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#4959
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#4958
              #items: []
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#5068
              #items: array:1 [
                0 => App\Models\Element {#5071
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:6 [ …6]
                  #original: array:6 [ …6]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1340372"
              "type" => "book_page"
            ]
            "previous" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
            "tasks" => Illuminate\Database\Eloquent\Collection {#4957
              #items: array:7 [
                0 => App\Models\Task {#5099
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Task {#5140
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                2 => App\Models\Task {#5143
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                3 => App\Models\Task {#5163
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                4 => App\Models\Task {#5149
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                5 => App\Models\Task {#5136
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                6 => App\Models\Task {#5121
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:21 [
            "id" => 1340371
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "20"
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/page-20"
            "field_display_title" => "20"
            "field_folder" => "1"
            "field_image_name" => "20"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#4960}
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#4959}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#4958}
            "content" => Illuminate\Database\Eloquent\Collection {#5068}
            "next" => array:2 [
              "refs" => "1340372"
              "type" => "book_page"
            ]
            "previous" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
            "tasks" => Illuminate\Database\Eloquent\Collection {#4957}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "previous" => Illuminate\Database\Eloquent\Collection {#4939
      #items: array:1 [
        0 => App\Models\BookPage {#4938
          #connection: "mysql"
          #table: "book_pages"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:21 [
            "id" => 1340369
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "18"
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/page-18"
            "field_display_title" => "18"
            "field_folder" => "1"
            "field_image_name" => "18"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#4940
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#4941
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#4942
              #items: []
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#4952
              #items: array:1 [
                0 => App\Models\Element {#4951
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:6 [ …6]
                  #original: array:6 [ …6]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
            "previous" => array:2 [
              "refs" => "1340368"
              "type" => "book_page"
            ]
            "tasks" => Illuminate\Database\Eloquent\Collection {#4945
              #items: array:8 [
                0 => App\Models\Task {#4963
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Task {#5004
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                2 => App\Models\Task {#5007
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                3 => App\Models\Task {#5027
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                4 => App\Models\Task {#5013
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                5 => App\Models\Task {#5000
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                6 => App\Models\Task {#4985
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                7 => App\Models\Task {#4971
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                   …6
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:21 [
            "id" => 1340369
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "18"
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/page-18"
            "field_display_title" => "18"
            "field_folder" => "1"
            "field_image_name" => "18"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#4940}
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#4941}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#4942}
            "content" => Illuminate\Database\Eloquent\Collection {#4952}
            "next" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
            "previous" => array:2 [
              "refs" => "1340368"
              "type" => "book_page"
            ]
            "tasks" => Illuminate\Database\Eloquent\Collection {#4945}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "tasks" => Illuminate\Database\Eloquent\Collection {#1009
      #items: array:9 [
        0 => App\Models\Task {#1070
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288007
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-8"
            "field_display_title" => "3.8"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1077
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1076
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1086
              #items: array:1 [
                0 => App\Models\Branch {#1085 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1121
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1119
              #items: array:3 [
                0 => App\Models\Element {#1111 …30}
                1 => App\Models\Element {#1110 …30}
                2 => App\Models\Element {#1108 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288008"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288006"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1115
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288007
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-8"
            "field_display_title" => "3.8"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1077}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1076}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1086}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1121}
            "content" => Illuminate\Database\Eloquent\Collection {#1119}
            "next" => array:2 [
              "refs" => "1288008"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288006"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1115}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        1 => App\Models\Task {#1078
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288008
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-9"
            "field_display_title" => "3.9"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1128
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1116
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1114
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1117
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1082
              #items: array:3 [
                0 => App\Models\Element {#1122 …30}
                1 => App\Models\Element {#1120 …30}
                2 => App\Models\Element {#1123 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288009"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288007"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1099
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288008
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-9"
            "field_display_title" => "3.9"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1128}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1116}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1114}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1117}
            "content" => Illuminate\Database\Eloquent\Collection {#1082}
            "next" => array:2 [
              "refs" => "1288009"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288007"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1099}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        2 => App\Models\Task {#1118
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288009
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-10"
            "field_display_title" => "3.10"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1079
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1105
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1104
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1107
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1103
              #items: array:3 [
                0 => App\Models\Element {#1156 …30}
                1 => App\Models\Element {#1158 …30}
                2 => App\Models\Element {#1160 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288010"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288008"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1145
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288009
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-10"
            "field_display_title" => "3.10"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1079}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1105}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1104}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1107}
            "content" => Illuminate\Database\Eloquent\Collection {#1103}
            "next" => array:2 [
              "refs" => "1288010"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288008"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1145}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        3 => App\Models\Task {#1106
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288010
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-11"
            "field_display_title" => "3.11"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1109
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1147
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1154
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1146
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1142
              #items: array:3 [
                0 => App\Models\Element {#1170 …30}
                1 => App\Models\Element {#1172 …30}
                2 => App\Models\Element {#1174 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288011"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288009"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1167
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288010
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-11"
            "field_display_title" => "3.11"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1109}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1147}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1154}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1146}
            "content" => Illuminate\Database\Eloquent\Collection {#1142}
            "next" => array:2 [
              "refs" => "1288011"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288009"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1167}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        4 => App\Models\Task {#1144
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288011
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-12"
            "field_display_title" => "3.12"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1143
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1166
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1168
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1164
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1163
              #items: array:3 [
                0 => App\Models\Element {#1184 …30}
                1 => App\Models\Element {#1186 …30}
                2 => App\Models\Element {#1188 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288012"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288010"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1181
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288011
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-12"
            "field_display_title" => "3.12"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1143}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1166}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1168}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1164}
            "content" => Illuminate\Database\Eloquent\Collection {#1163}
            "next" => array:2 [
              "refs" => "1288012"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288010"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1181}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        5 => App\Models\Task {#1165
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288012
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-13"
            "field_display_title" => "3.13"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1162
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1180
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1182
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1178
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1177
              #items: array:3 [
                0 => App\Models\Element {#1198 …30}
                1 => App\Models\Element {#1200 …30}
                2 => App\Models\Element {#1202 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288013"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288011"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1195
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288012
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-13"
            "field_display_title" => "3.13"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1162}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1180}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1182}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1178}
            "content" => Illuminate\Database\Eloquent\Collection {#1177}
            "next" => array:2 [
              "refs" => "1288013"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288011"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1195}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
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          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        6 => App\Models\Task {#1179
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288013
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-14"
            "field_display_title" => "3.14"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1176
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1194
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1196
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1192
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1191
              #items: array:3 [
                0 => App\Models\Element {#1212 …30}
                1 => App\Models\Element {#1214 …30}
                2 => App\Models\Element {#1216 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288014"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288012"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1209
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288013
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-14"
            "field_display_title" => "3.14"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1176}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1194}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1196}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1192}
            "content" => Illuminate\Database\Eloquent\Collection {#1191}
            "next" => array:2 [
              "refs" => "1288014"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288012"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1209}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
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          #attributeCastCache: []
          #dateFormat: null
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          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        7 => App\Models\Task {#1193
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288014
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-15"
            "field_display_title" => "3.15"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1190
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1208
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1210
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1206
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1205
              #items: array:3 [
                0 => App\Models\Element {#1226 …30}
                1 => App\Models\Element {#1228 …30}
                2 => App\Models\Element {#1230 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288015"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288013"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1223
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288014
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-15"
            "field_display_title" => "3.15"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1190}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1208}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1210}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1206}
            "content" => Illuminate\Database\Eloquent\Collection {#1205}
            "next" => array:2 [
              "refs" => "1288015"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288013"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1223}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
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          #attributeCastCache: []
          #dateFormat: null
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          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        8 => App\Models\Task {#1207
          #connection: "mysql"
          #table: "tasks"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1288015
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-16"
            "field_display_title" => "3.16"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1204
              #items: array:1 [
                0 => App\Models\Term {#1073 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1222
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1224
              #items: array:1 [
                0 => App\Models\Branch {#1131 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1220
              #items: array:3 [
                0 => App\Models\Branch {#1131 …30}
                1 => App\Models\Branch {#1135 …30}
                2 => App\Models\Branch {#1139 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1219
              #items: array:3 [
                0 => App\Models\Element {#1240 …30}
                1 => App\Models\Element {#1242 …30}
                2 => App\Models\Element {#1244 …30}
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1288016"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288014"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1237
              #items: array:1 [
                0 => App\Models\Book {#1015}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1288015
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "19"
            "field_page_end" => null
            "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/03-16"
            "field_display_title" => "3.16"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1204}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_match" => null
            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1222}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1224}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1220}
            "content" => Illuminate\Database\Eloquent\Collection {#1219}
            "next" => array:2 [
              "refs" => "1288016"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1288014"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1237}
            "page" => array:2 [
              "refs" => "1340370"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
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          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
  ]
  #original: array:21 [
    "id" => 1340370
    "created_at" => "2026-04-10 13:58:26"
    "updated_at" => null
    "field_page_start" => "19"
    "field_url" => "/8-klass/fizika/ileksa-gelfgat-uchebnik/page-19"
    "field_display_title" => "19"
    "field_folder" => "1"
    "field_image_name" => "19"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1008}
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1016}
    "field_metatags_title" => null
    "field_metatags_description" => null
    "field_h1" => null
    "field_description_top" => null
    "field_description_bottom" => null
    "edition_groups" => Illuminate\Database\Eloquent\Collection {#1007}
    "content" => Illuminate\Database\Eloquent\Collection {#1054}
    "next" => array:2 [
      "refs" => "1340371"
      "type" => "book_page"
    ]
    "previous" => array:2 [
      "refs" => "1340369"
      "type" => "book_page"
    ]
    "tasks" => Illuminate\Database\Eloquent\Collection {#1009}
  ]
  #changes: []
  #casts: []
  #classCastCache: []
  #attributeCastCache: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: []
  #touches: []
  +timestamps: true
  +usesUniqueIds: false
  #hidden: []
  #visible: []
  #fillable: []
  #guarded: array:1 [
    0 => "*"
  ]
}
Физика, 8-11 класс Учебник, задачник, авторы: Гельфгат Илья Маркович, Генденштейн Лев Элевич, Кирик Леонид Анатольевич, издательство Илекса, Москва, 2005, страница 19
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