Страница 273 - гдз по физике 9 класс учебник Грачев, Погожев

Физика, 9 класс Учебник, авторы: Грачев Александр Васильевич, Погожев Владимир Александрович, Боков Павел Юрьевич, издательство Вентана-граф, Москва, 2012

Авторы: Грачев А. В., Погожев В. А., Боков П. Ю.

Тип: Учебник

Серия: алгоритм успеха

Издательство: Вентана-граф

Год издания: 2012 - 2026

Цвет обложки: синий изображено здание и радуга

ISBN: 978-5-360-07412-0

Cтраница 273

App\Models\BookPage {#1003 // resources/views/models/book_page/default.blade.php
  #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" => 1437779
    "created_at" => "2026-04-10 13:58:26"
    "updated_at" => null
    "field_page_start" => "273"
    "field_url" => "/9-klass/fizika/grachev-uchebnik/page-273"
    "field_display_title" => "273"
    "field_folder" => "1"
    "field_image_name" => "273"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1008
      #items: []
      #escapeWhenCastingToString: false
    }
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1041
      #items: array:1 [
        0 => App\Models\Book {#1006
          #connection: "mysql"
          #table: "books"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: false
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:50 [
            "id" => 1202
            "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 {#1009
              #items: array:1 [
                0 => App\Models\Term {#1007
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:10 [
                    "id" => 6493
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Физика"
                    "field_abbreviated_name" => null
                    "field_cases" => array:6 [
                      "field_accusative_case" => "физику"
                      "field_creative_case" => "физикой"
                      "field_dative_case" => "физике"
                      "field_genitive_case" => "физики"
                      "field_nominative_case" => "физика"
                      "field_prepositional_case" => "физике"
                    ]
                    "field_foreign_lang_name" => null
                    "field_short_name" => null
                    "field_subject_type" => "technical_subject"
                    "field_translit" => "fizika"
                  ]
                  #original: array:10 [
                    "id" => 6493
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Физика"
                    "field_abbreviated_name" => null
                    "field_cases" => array:6 [
                      "field_accusative_case" => "физику"
                      "field_creative_case" => "физикой"
                      "field_dative_case" => "физике"
                      "field_genitive_case" => "физики"
                      "field_nominative_case" => "физика"
                      "field_prepositional_case" => "физике"
                    ]
                    "field_foreign_lang_name" => null
                    "field_short_name" => null
                    "field_subject_type" => "technical_subject"
                    "field_translit" => "fizika"
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_class" => Illuminate\Database\Eloquent\Collection {#1010
              #items: array:1 [
                0 => App\Models\Term {#1011
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:6 [
                    "id" => 5458
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "9"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "девятый"
                      "field_creative_case" => "девятым"
                      "field_dative_case" => "девятому"
                      "field_genitive_case" => "девятого"
                      "field_nominative_case" => "девятый"
                      "field_prepositional_case" => "девятом"
                    ]
                    "field_translit" => "devjatyj"
                  ]
                  #original: array:6 [
                    "id" => 5458
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "9"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "девятый"
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                      "field_genitive_case" => "девятого"
                      "field_nominative_case" => "девятый"
                      "field_prepositional_case" => "девятом"
                    ]
                    "field_translit" => "devjatyj"
                  ]
                  #changes: []
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                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_publisher" => Illuminate\Database\Eloquent\Collection {#1012
              #items: array:1 [
                0 => App\Models\Term {#1013
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:6 [
                    "id" => 5174
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Вентана-граф"
                    "field_cases" => null
                    "field_translit" => "ventana-graf"
                  ]
                  #original: array:6 [
                    "id" => 5174
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Вентана-граф"
                    "field_cases" => null
                    "field_translit" => "ventana-graf"
                  ]
                  #changes: []
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                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_author" => Illuminate\Database\Eloquent\Collection {#1014
              #items: array:3 [
                0 => App\Models\Term {#1015
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:12 [
                    "id" => 4180
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Грачев"
                    "field_bio" => null
                    "field_degree_rp" => null
                    "field_foreign_lang_name" => null
                    "field_foreign_lang_patronymic" => null
                    "field_foreign_lang_surname" => null
                    "field_name" => "Александр"
                    "field_patronymic" => "Васильевич"
                    "field_surname_rp" => null
                  ]
                  #original: array:12 [
                    "id" => 4180
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Грачев"
                    "field_bio" => null
                    "field_degree_rp" => null
                    "field_foreign_lang_name" => null
                    "field_foreign_lang_patronymic" => null
                    "field_foreign_lang_surname" => null
                    "field_name" => "Александр"
                    "field_patronymic" => "Васильевич"
                    "field_surname_rp" => null
                  ]
                  #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\Term {#1016
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:12 [
                    "id" => 5484
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Погожев"
                    "field_bio" => null
                    "field_degree_rp" => null
                    "field_foreign_lang_name" => null
                    "field_foreign_lang_patronymic" => null
                    "field_foreign_lang_surname" => null
                    "field_name" => "Владимир"
                    "field_patronymic" => "Александрович"
                    "field_surname_rp" => null
                  ]
                  #original: array:12 [
                    "id" => 5484
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Погожев"
                    "field_bio" => null
                    "field_degree_rp" => null
                    "field_foreign_lang_name" => null
                    "field_foreign_lang_patronymic" => null
                    "field_foreign_lang_surname" => null
                    "field_name" => "Владимир"
                    "field_patronymic" => "Александрович"
                    "field_surname_rp" => null
                  ]
                  #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\Term {#1017
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:12 [
                    "id" => 3888
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Боков"
                    "field_bio" => null
                    "field_degree_rp" => null
                    "field_foreign_lang_name" => null
                    "field_foreign_lang_patronymic" => null
                    "field_foreign_lang_surname" => null
                    "field_name" => "Павел"
                    "field_patronymic" => "Юрьевич"
                    "field_surname_rp" => null
                  ]
                  #original: array:12 [
                    "id" => 3888
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Боков"
                    "field_bio" => null
                    "field_degree_rp" => null
                    "field_foreign_lang_name" => null
                    "field_foreign_lang_patronymic" => null
                    "field_foreign_lang_surname" => null
                    "field_name" => "Павел"
                    "field_patronymic" => "Юрьевич"
                    "field_surname_rp" => null
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #touches: []
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1018
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_book_type" => Illuminate\Database\Eloquent\Collection {#1019
              #items: array:1 [
                0 => App\Models\Term {#1020
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:10 [
                    "id" => 6671
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Учебник"
                    "field_book_type_foreign" => null
                    "field_cases" => array:6 [
                      "field_accusative_case" => "учебник"
                      "field_creative_case" => "учебником"
                      "field_dative_case" => "учебнику"
                      "field_genitive_case" => "учебника"
                      "field_nominative_case" => "учебник"
                      "field_prepositional_case" => "учебнике"
                    ]
                    "field_plural_form" => null
                    "field_short_name" => null
                    "field_short_name_foreign" => null
                    "field_translit" => "uchebnik"
                  ]
                  #original: array:10 [
                    "id" => 6671
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Учебник"
                    "field_book_type_foreign" => null
                    "field_cases" => array:6 [
                      "field_accusative_case" => "учебник"
                      "field_creative_case" => "учебником"
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                      "field_genitive_case" => "учебника"
                      "field_nominative_case" => "учебник"
                      "field_prepositional_case" => "учебнике"
                    ]
                    "field_plural_form" => null
                    "field_short_name" => null
                    "field_short_name_foreign" => null
                    "field_translit" => "uchebnik"
                  ]
                  #changes: []
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                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_country" => Illuminate\Database\Eloquent\Collection {#1021
              #items: array:1 [
                0 => App\Models\Term {#1022
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
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                  #escapeWhenCastingToString: false
                  #attributes: array:6 [
                    "id" => 9
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Россия"
                    "field_cases" => array:6 [
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                    ]
                    "field_translit" => "rossiya"
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                    "name" => "Россия"
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            "field_city" => Illuminate\Database\Eloquent\Collection {#1023
              #items: array:1 [
                0 => App\Models\Term {#1024
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
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                0 => App\Models\Term {#1026
                  #connection: "mysql"
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                    "created_at" => "2026-04-10 13:58:26"
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            "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1028
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                0 => App\Models\Term {#1030
                  #connection: "mysql"
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "ФГОС (старый)"
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                    }
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              ]
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            "next" => array:2 [
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              #items: array:4 [
                0 => App\Models\Task {#5863
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                  #keyType: "int"
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                  #attributes: array:24 [
                    "id" => 1438453
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "274"
                    "field_page_end" => null
                    "field_url" => "/9-klass/fizika/grachev-uchebnik/44vopr-1"
                    "field_display_title" => "1"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#5867
                      #items: array:1 [
                        0 => App\Models\Term {#5864
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 26
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "номер"
                            "field_cases" => array:6 [ …6]
                            "field_short_name" => ""
                          ]
                          #original: array:6 [
                            "id" => 26
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "номер"
                            "field_cases" => array:6 [ …6]
                            "field_short_name" => ""
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #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 {#5866
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#5876
                      #items: array:1 [
                        0 => App\Models\Branch {#5875
                          #connection: "mysql"
                          #table: "branches"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: true
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:24 [
                            "id" => 1437978
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "field_display_title" => "Оптика"
                            "field_branch_order" => "8"
                            "field_url" => null
                            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#5880 …2}
                            "field_page_start" => "248"
                            "field_branch_display" => "0"
                            "field_branch_expanded" => "0"
                            "field_display_branch_in_title" => "1"
                            "field_display_task_interval" => "0"
                            "field_display_branch_page" => "1"
                            "field_branch_title_in_content" => "0"
                            "field_navigation_title" => null
                            "field_metatags_title" => null
                            "field_metatags_description" => null
                            "field_h1" => null
                            "field_description_top" => null
                            "field_description_bottom" => null
                            "field_branch_cover" => []
                            "field_branch_covers" => []
                            "book" => Illuminate\Database\Eloquent\Collection {#5879 …2}
                            "branch_parent" => Illuminate\Database\Eloquent\Collection {#5878 …2}
                          ]
                          #original: array:24 [
                            "id" => 1437978
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "field_display_title" => "Оптика"
                            "field_branch_order" => "8"
                            "field_url" => null
                            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#5880 …2}
                            "field_page_start" => "248"
                            "field_branch_display" => "0"
                            "field_branch_expanded" => "0"
                            "field_display_branch_in_title" => "1"
                            "field_display_task_interval" => "0"
                            "field_display_branch_page" => "1"
                            "field_branch_title_in_content" => "0"
                            "field_navigation_title" => null
                            "field_metatags_title" => null
                            "field_metatags_description" => null
                            "field_h1" => null
                            "field_description_top" => null
                            "field_description_bottom" => null
                            "field_branch_cover" => []
                            "field_branch_covers" => []
                            "book" => Illuminate\Database\Eloquent\Collection {#5879 …2}
                            "branch_parent" => Illuminate\Database\Eloquent\Collection {#5878 …2}
                          ]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#5912
                      #items: array:3 [
                        0 => App\Models\Branch {#5922
                          #connection: "mysql"
                          #table: "branches"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: true
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:24 [
                            "id" => 1437978
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "field_display_title" => "Оптика"
                            "field_branch_order" => "8"
                            "field_url" => null
                            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#5923 …2}
                            "field_page_start" => "248"
                            "field_branch_display" => "0"
                            "field_branch_expanded" => "0"
                            "field_display_branch_in_title" => "1"
                            "field_display_task_interval" => "0"
                            "field_display_branch_page" => "1"
                            "field_branch_title_in_content" => "0"
                            "field_navigation_title" => null
                            "field_metatags_title" => null
                            "field_metatags_description" => null
                            "field_h1" => null
                            "field_description_top" => null
                            "field_description_bottom" => null
                            "field_branch_cover" => []
                            "field_branch_covers" => []
                            "book" => Illuminate\Database\Eloquent\Collection {#5924 …2}
                            "branch_parent" => Illuminate\Database\Eloquent\Collection {#5925 …2}
                          ]
                          #original: array:24 [
                            "id" => 1437978
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "field_display_title" => "Оптика"
                            "field_branch_order" => "8"
                            "field_url" => null
                            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#5923 …2}
                            "field_page_start" => "248"
                            "field_branch_display" => "0"
                            "field_branch_expanded" => "0"
                            "field_display_branch_in_title" => "1"
                            "field_display_task_interval" => "0"
                            "field_display_branch_page" => "1"
                            "field_branch_title_in_content" => "0"
                            "field_navigation_title" => null
                            "field_metatags_title" => null
                            "field_metatags_description" => null
                            "field_h1" => null
                            "field_description_top" => null
                            "field_description_bottom" => null
                            "field_branch_cover" => []
                            "field_branch_covers" => []
                            "book" => Illuminate\Database\Eloquent\Collection {#5924 …2}
                            "branch_parent" => Illuminate\Database\Eloquent\Collection {#5925 …2}
                          ]
                          #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\Branch {#5926
                          #connection: "mysql"
                          #table: "branches"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: true
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:24 [
                            "id" => 1437992
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "field_display_title" => "Преломление света в призме. Дисперсия"
                            "field_branch_order" => "44"
                            "field_url" => null
                            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#5930 …2}
                            "field_page_start" => "272"
                            "field_branch_display" => "0"
                            "field_branch_expanded" => "0"
                            "field_display_branch_in_title" => "1"
                            "field_display_task_interval" => "0"
                            "field_display_branch_page" => "1"
                            "field_branch_title_in_content" => "0"
                            "field_navigation_title" => null
                            "field_metatags_title" => null
                            "field_metatags_description" => null
                            "field_h1" => null
                            "field_description_top" => null
                            "field_description_bottom" => null
                            "field_branch_cover" => []
                            "field_branch_covers" => []
                            "book" => Illuminate\Database\Eloquent\Collection {#5929 …2}
                            "branch_parent" => Illuminate\Database\Eloquent\Collection {#5928 …2}
                          ]
                          #original: array:24 [
                            "id" => 1437992
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "field_display_title" => "Преломление света в призме. Дисперсия"
                            "field_branch_order" => "44"
                            "field_url" => null
                            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#5930 …2}
                            "field_page_start" => "272"
                            "field_branch_display" => "0"
                            "field_branch_expanded" => "0"
                            "field_display_branch_in_title" => "1"
                            "field_display_task_interval" => "0"
                            "field_display_branch_page" => "1"
                            "field_branch_title_in_content" => "0"
                            "field_navigation_title" => null
                            "field_metatags_title" => null
                            "field_metatags_description" => null
                            "field_h1" => null
                            "field_description_top" => null
                            "field_description_bottom" => null
                            "field_branch_cover" => []
                            "field_branch_covers" => []
                            "book" => Illuminate\Database\Eloquent\Collection {#5929 …2}
                            "branch_parent" => Illuminate\Database\Eloquent\Collection {#5928 …2}
                          ]
                          #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\Branch {#5931
                          #connection: "mysql"
                          #table: "branches"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: true
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:24 [
                            "id" => 1437993
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "field_display_title" => "Вопросы"
                            "field_branch_order" => null
                            "field_url" => null
                            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#5932 …2}
                            "field_page_start" => "274"
                            "field_branch_display" => "0"
                            "field_branch_expanded" => "0"
                            "field_display_branch_in_title" => "1"
                            "field_display_task_interval" => "0"
                            "field_display_branch_page" => "1"
                            "field_branch_title_in_content" => "0"
                            "field_navigation_title" => null
                            "field_metatags_title" => null
                            "field_metatags_description" => null
                            "field_h1" => null
                            "field_description_top" => null
                            "field_description_bottom" => null
                            "field_branch_cover" => []
                             …3
                          ]
                          #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
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#5868
                      #items: array:2 [
                        0 => App\Models\Element {#5904
                          #connection: "mysql"
                          #table: "elements"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: true
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:7 [ …7]
                          #original: array:7 [ …7]
                          #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\Element {#5903
                          #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" => "1438454"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1438452"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#5907
                      #items: array:1 [
                        0 => App\Models\Book {#1006}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "page" => array:2 [
                      "refs" => "1437780"
                      "type" => "book_page"
                    ]
                  ]
                  #original: array:24 [
                    "id" => 1438453
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "274"
                    "field_page_end" => null
                    "field_url" => "/9-klass/fizika/grachev-uchebnik/44vopr-1"
                    "field_display_title" => "1"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#5867}
                    "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 {#5866}
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#5876}
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#5912}
                    "content" => Illuminate\Database\Eloquent\Collection {#5868}
                    "next" => array:2 [
                      "refs" => "1438454"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1438452"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#5907}
                    "page" => array:2 [
                      "refs" => "1437780"
                      "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 {#5910
                  #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" => 1438454
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "274"
                    "field_page_end" => null
                    "field_url" => "/9-klass/fizika/grachev-uchebnik/44vopr-2"
                    "field_display_title" => "2"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#5919
                      #items: array:1 [
                        0 => App\Models\Term {#5864}
                      ]
                      #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 {#5905
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#5908
                      #items: array:1 [
                        0 => App\Models\Branch {#5922}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#5872
                      #items: array:3 [
                        0 => App\Models\Branch {#5922}
                        1 => App\Models\Branch {#5926}
                        2 => App\Models\Branch {#5931}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#5870
                      #items: array:2 [
                        0 => App\Models\Element {#5887
                          #connection: "mysql"
                          #table: "elements"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: true
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:7 [ …7]
                          #original: array:7 [ …7]
                          #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\Element {#5883
                          #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" => "1438455"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1438453"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#5889
                      #items: array:1 [
                        0 => App\Models\Book {#1006}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "page" => array:2 [
                      "refs" => "1437780"
                      "type" => "book_page"
                    ]
                  ]
                  #original: array:24 [
                    "id" => 1438454
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "274"
                    "field_page_end" => null
                    "field_url" => "/9-klass/fizika/grachev-uchebnik/44vopr-2"
                    "field_display_title" => "2"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#5919}
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                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#5872}
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                    0 => "*"
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                }
                2 => App\Models\Task {#5894
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}
Физика, 9 класс Учебник, авторы: Грачев Александр Васильевич, Погожев Владимир Александрович, Боков Павел Юрьевич, издательство Вентана-граф, Москва, 2012, страница 273
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