Страница 69, часть 1 - гдз по физике 9 класс учебник часть 1, 2 Генденштейн, Булатова

Авторы: Генденштейн Л. Э., Булатова А. А., Корнильев И. Н., Кошкина А. В.

Тип: Учебник

Издательство: Бином

Год издания: 2016 - 2026

Часть: 1

Цвет обложки: бирюзовый

ISBN: 978-5-9963-3062-1

Часть 1. Cтраница 69

App\Models\BookPage {#994 // resources/views/models/book_page/default.blade.php
  #connection: "mysql"
  #table: "book_pages"
  #primaryKey: "id"
  #keyType: "int"
  +incrementing: true
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  #withCount: []
  +preventsLazyLoading: false
  #perPage: 15
  +exists: true
  +wasRecentlyCreated: false
  #escapeWhenCastingToString: false
  #attributes: array:21 [
    "id" => 1434468
    "created_at" => "2026-04-08 17:28:58"
    "updated_at" => null
    "field_page_start" => "69"
    "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik/page-1-69"
    "field_display_title" => "69"
    "field_folder" => "1"
    "field_image_name" => "69"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#304
      #items: array:1 [
        0 => App\Models\Branch {#1001
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
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          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:23 [
            "id" => 1433206
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "field_display_title" => null
            "field_branch_order" => "1"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#998
              #items: array:1 [
                0 => App\Models\Term {#302
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 31
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "name" => "Часть"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => "1"
                    "field_short_name" => "ч."
                  ]
                  #original: array:7 [
                    "id" => 31
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "name" => "Часть"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => "1"
                    "field_short_name" => "ч."
                  ]
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                    0 => "*"
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                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "6"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
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            "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" => []
            "book" => Illuminate\Database\Eloquent\Collection {#313
              #items: array:1 [
                0 => App\Models\Book {#997
                  #connection: "mysql"
                  #table: "books"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #escapeWhenCastingToString: false
                  #attributes: array:50 [
                    "id" => 2980
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1005
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                        0 => App\Models\Term {#1003
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                          #attributes: array:10 [
                            "id" => 6493
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
                            "name" => "Физика"
                            "field_abbreviated_name" => null
                            "field_cases" => array:6 [ …6]
                            "field_foreign_lang_name" => null
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                            "field_subject_type" => "technical_subject"
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                        0 => App\Models\Term {#1006
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                            "id" => 5458
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
                            "name" => "9"
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                            "field_translit" => "devjatyj"
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                            "created_at" => "2026-04-08 17:28:58"
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                            "field_cases" => array:6 [ …6]
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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1007
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                        0 => App\Models\Term {#1008
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                          #table: "terms"
                          #primaryKey: "id"
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                          #with: []
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                          #attributes: array:6 [
                            "id" => 5208
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
                            "name" => "Бином"
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                          ]
                          #original: array:6 [
                            "id" => 5208
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                          ]
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                    "field_author" => Illuminate\Database\Eloquent\Collection {#1009
                      #items: array:4 [
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                            "id" => 4104
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                            "field_patronymic" => "Элевич"
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                          ]
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                          ]
                        }
                        1 => App\Models\Term {#1011
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                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
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                          #attributes: array:12 [
                            "id" => 3936
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
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                            "field_bio" => null
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                            "field_foreign_lang_patronymic" => null
                            "field_foreign_lang_surname" => null
                            "field_name" => "Альбина"
                            "field_patronymic" => "Александрова"
                            "field_surname_rp" => null
                          ]
                          #original: array:12 [
                            "id" => 3936
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                            "name" => "Булатова"
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                        2 => App\Models\Term {#1012
                          #connection: "mysql"
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                        3 => App\Models\Term {#1013
                          #connection: "mysql"
                          #table: "terms"
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                            "field_name" => "Анжелика"
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                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1014
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                      #items: array:1 [
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                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1021
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1022
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1023
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1024
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1025
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1026
                      #items: array:1 [
                        0 => App\Models\Term {#1027
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:12 [
                            "id" => 5395
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
                            "name" => "Орлов"
                            "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" => "Алексеевич"
                            "field_surname_rp" => "Орлова"
                          ]
                          #original: array:12 [
                            "id" => 5395
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
                            "name" => "Орлов"
                            "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" => "Алексеевич"
                            "field_surname_rp" => "Орлова"
                          ]
                          #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_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2016"
                    "field_publication_year_until" => null
                    "field_part" => "1, 2"
                    "field_part_writing" => "Часть"
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебное издание"
                    "field_allowed" => null
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "1111"
                    "field_priority" => null
                    "field_default_folder" => "/fizika_09/gendenshtejn-u/"
                    "field_isbn" => "978-5-9963-3062-1"
                    "field_cover" => array:2 [
                      0 => "/media/fizika_09/gendenshtejn-u/covers/cover1.webp"
                      1 => "/media/fizika_09/gendenshtejn-u/covers/cover2.webp"
                    ]
                    "field_cover_alts" => array:2 [
                      0 => ""
                      1 => ""
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                    "field_covers" => array:2 [
                      0 => array:4 [
                        "path" => "/media/fizika_09/gendenshtejn-u/covers/cover1.webp"
                        "alt" => ""
                        "width" => "1863"
                        "height" => "2813"
                      ]
                      1 => array:4 [
                        "path" => "/media/fizika_09/gendenshtejn-u/covers/cover2.webp"
                        "alt" => ""
                        "width" => "1863"
                        "height" => "2809"
                      ]
                    ]
                    "field_popular_book" => "0"
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1028
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1029
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1030
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1031
                      #items: array:1 [
                        0 => App\Models\Term {#1032
                          #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" => 6978
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
                            "name" => "бирюзовый"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "biruzovyy"
                          ]
                          #original: array:6 [
                            "id" => 6978
                            "created_at" => "2026-04-08 17:28:58"
                            "updated_at" => null
                            "name" => "бирюзовый"
                            "field_cases" => array:6 [ …6]
                            "field_translit" => "biruzovyy"
                          ]
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                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
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                          #relations: []
                          #touches: []
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                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
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                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
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                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 380
                      "subject" => 556
                      "class_subject" => 493
                    ]
                  ]
                  #original: array:50 [
                    "id" => 2980
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1005}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1004}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1007}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1009}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1014}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1015}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1017}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1019}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1021}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1022}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1023}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1024}
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1025}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1026}
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2016"
                    "field_publication_year_until" => null
                    "field_part" => "1, 2"
                    "field_part_writing" => "Часть"
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебное издание"
                    "field_allowed" => null
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "1111"
                    "field_priority" => null
                    "field_default_folder" => "/fizika_09/gendenshtejn-u/"
                    "field_isbn" => "978-5-9963-3062-1"
                    "field_cover" => array:2 [
                      0 => "/media/fizika_09/gendenshtejn-u/covers/cover1.webp"
                      1 => "/media/fizika_09/gendenshtejn-u/covers/cover2.webp"
                    ]
                    "field_cover_alts" => array:2 [
                      0 => ""
                      1 => ""
                    ]
                    "field_covers" => array:2 [
                      0 => array:4 [
                        "path" => "/media/fizika_09/gendenshtejn-u/covers/cover1.webp"
                        "alt" => ""
                        "width" => "1863"
                        "height" => "2813"
                      ]
                      1 => array:4 [
                        "path" => "/media/fizika_09/gendenshtejn-u/covers/cover2.webp"
                        "alt" => ""
                        "width" => "1863"
                        "height" => "2809"
                      ]
                    ]
                    "field_popular_book" => "0"
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1028}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1029}
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1030}
                    "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1031}
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 380
                      "subject" => 556
                      "class_subject" => 493
                    ]
                  ]
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                  #attributeCastCache: []
                  #dateFormat: null
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                  #touches: []
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1033
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:23 [
            "id" => 1433206
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "field_display_title" => null
            "field_branch_order" => "1"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#998}
            "field_page_start" => "6"
            "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" => []
            "book" => Illuminate\Database\Eloquent\Collection {#313}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1033}
          ]
          #changes: []
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          #attributeCastCache: []
          #dateFormat: null
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          #dispatchesEvents: []
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          #relations: []
          #touches: []
          +timestamps: true
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          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1034
      #items: array:1 [
        0 => App\Models\Book {#997}
      ]
      #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 {#1035
      #items: []
      #escapeWhenCastingToString: false
    }
    "content" => Illuminate\Database\Eloquent\Collection {#1036
      #items: array:1 [
        0 => App\Models\Element {#1037
          #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 [
            "id" => 1697191
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1038
              #items: array:1 [
                0 => App\Models\Edition {#1039
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:21 [
                    "id" => 6168
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1040 …2}
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
                    "field_page_content_mode" => "image"
                    "field_content_text_checked" => "0"
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
                    "field_moderator" => "stas"
                    "field_edition_type" => "statement"
                    "field_root_dir" => "0-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1042 …2}
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1043 …2}
                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1044 …2}
                    "field_content_source" => null
                  ]
                  #original: array:21 [
                    "id" => 6168
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1040 …2}
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
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                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
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                    "field_edition_type" => "statement"
                    "field_root_dir" => "0-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1042 …2}
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1043 …2}
                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1044 …2}
                    "field_content_source" => null
                  ]
                  #changes: []
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                  #attributeCastCache: []
                  #dateFormat: null
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                  +timestamps: true
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                  #visible: []
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                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "book_page" => array:2 [
              "refs" => "1434468"
              "type" => "book_page"
            ]
            "img" => array:1 [
              0 => array:5 [
                "name" => "69-1.jpg"
                "alt" => null
                "width" => "1938"
                "height" => 2805
                "path" => "/media/fizika_09/gendenshtejn-u/0-1/69-1.webp"
              ]
            ]
          ]
          #original: array:6 [
            "id" => 1697191
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1038}
            "book_page" => array:2 [
              "refs" => "1434468"
              "type" => "book_page"
            ]
            "img" => array:1 [
              0 => array:5 [
                "name" => "69-1.jpg"
                "alt" => null
                "width" => "1938"
                "height" => 2805
                "path" => "/media/fizika_09/gendenshtejn-u/0-1/69-1.webp"
              ]
            ]
          ]
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            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "next" => Illuminate\Database\Eloquent\Collection {#6188
      #items: array:1 [
        0 => App\Models\BookPage {#6061
          #connection: "mysql"
          #table: "book_pages"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
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          #escapeWhenCastingToString: false
          #attributes: array:21 [
            "id" => 1434469
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "field_page_start" => "70"
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            "field_display_title" => "70"
            "field_folder" => "1"
            "field_image_name" => "70"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#6064
              #items: array:1 [
                0 => App\Models\Branch {#6062
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [
                    "id" => 1433206
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
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                    "field_branch_order" => "1"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#6065 …2}
                    "field_page_start" => "6"
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                    "field_branch_expanded" => "0"
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                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
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                    "field_metatags_description" => null
                    "field_h1" => null
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                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#6067 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#6099 …2}
                  ]
                  #original: array:23 [
                    "id" => 1433206
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "field_display_title" => null
                    "field_branch_order" => "1"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#6065 …2}
                    "field_page_start" => "6"
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                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
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                    "field_metatags_description" => null
                    "field_h1" => null
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                    "field_branch_cover" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#6067 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#6099 …2}
                  ]
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                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#6100
              #items: array:1 [
                0 => App\Models\Book {#6068
                  #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" => 2980
                    "created_at" => "2026-04-08 17:28:58"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#6069 …2}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#6071 …2}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#6073 …2}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#6075 …2}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#6080 …2}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#6081 …2}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#6083 …2}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#6085 …2}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#6087 …2}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#6088 …2}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#6089 …2}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#6090 …2}
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#6091 …2}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#6092 …2}
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2016"
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                    "field_part" => "1, 2"
                    "field_part_writing" => "Часть"
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебное издание"
                    "field_allowed" => null
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "1111"
                    "field_priority" => null
                    "field_default_folder" => "/fizika_09/gendenshtejn-u/"
                    "field_isbn" => "978-5-9963-3062-1"
                    "field_cover" => array:2 [ …2]
                    "field_cover_alts" => array:2 [ …2]
                    "field_covers" => array:2 [ …2]
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                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#6095 …2}
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#6096 …2}
                    "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#6097 …2}
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                    "field_h1" => null
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                    "breadcrumbs" => array:3 [ …3]
                  ]
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#6069 …2}
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                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#6089 …2}
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                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#6091 …2}
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                    "field_part" => "1, 2"
                    "field_part_writing" => "Часть"
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебное издание"
                    "field_allowed" => null
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                    "field_link_to_source" => null
                    "field_tasks_count" => "1111"
                    "field_priority" => null
                    "field_default_folder" => "/fizika_09/gendenshtejn-u/"
                    "field_isbn" => "978-5-9963-3062-1"
                    "field_cover" => array:2 [ …2]
                    "field_cover_alts" => array:2 [ …2]
                    "field_covers" => array:2 [ …2]
                    "field_popular_book" => "0"
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#6094 …2}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#6095 …2}
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#6096 …2}
                    "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik"
                     …7
                  ]
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                }
              ]
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            "edition_groups" => Illuminate\Database\Eloquent\Collection {#6101
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                0 => App\Models\Element {#6103
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                  #attributes: array:6 [ …6]
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            "next" => array:2 [
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                0 => App\Models\Task {#6112
                  #connection: "mysql"
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                  +exists: true
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                  #attributes: array:24 [ …24]
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                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Task {#6164
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
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                  #withCount: []
                  +preventsLazyLoading: false
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                  +exists: true
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                  #attributes: array:24 [ …24]
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                  +timestamps: true
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                  #hidden: []
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                  #guarded: array:1 [ …1]
                }
                2 => App\Models\Task {#6175
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
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                  #attributes: array:24 [ …24]
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            "edition_groups" => Illuminate\Database\Eloquent\Collection {#6101}
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            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#5937
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                0 => App\Models\Branch {#5934
                  #connection: "mysql"
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                  #attributes: array:23 [ …23]
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                0 => App\Models\Book {#5940
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            "content" => Illuminate\Database\Eloquent\Collection {#5974
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                0 => App\Models\Element {#5975
                  #connection: "mysql"
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            "next" => array:2 [
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            "tasks" => Illuminate\Database\Eloquent\Collection {#5983
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                0 => App\Models\Task {#5984
                  #connection: "mysql"
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                  #hidden: []
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                }
                1 => App\Models\Task {#6028
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
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                  #attributes: array:24 [ …24]
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                  #guarded: array:1 [ …1]
                }
                2 => App\Models\Task {#6039
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
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                  +timestamps: true
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                  #guarded: array:1 [ …1]
                }
                3 => App\Models\Task {#6050
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
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                }
              ]
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            }
          ]
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    "tasks" => Illuminate\Database\Eloquent\Collection {#1045
      #items: array:3 [
        0 => App\Models\Task {#1046
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            "updated_at" => null
            "field_page_start" => "69"
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                0 => App\Models\Term {#1048
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                0 => App\Models\Branch {#1001}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1051
              #items: array:4 [
                0 => App\Models\Branch {#1001}
                1 => App\Models\Branch {#1052
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [ …23]
                  #original: array:23 [ …23]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                2 => App\Models\Branch {#1060
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [ …23]
                  #original: array:23 [ …23]
                  #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\Branch {#1073
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:23 [ …23]
                  #original: array:23 [ …23]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1086
              #items: array:2 [
                0 => App\Models\Element {#1087
                  #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: []
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                  #attributeCastCache: []
                  #dateFormat: null
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                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Element {#1089
                  #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
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1433480"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1433478"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1097
              #items: array:1 [
                0 => App\Models\Book {#997}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1434710"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1433479
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "field_page_start" => "69"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik/07-8"
            "field_display_title" => "8"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1047}
            "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 {#1049}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1050}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1051}
            "content" => Illuminate\Database\Eloquent\Collection {#1086}
            "next" => array:2 [
              "refs" => "1433480"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1433478"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1097}
            "page" => array:2 [
              "refs" => "1434710"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
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          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        1 => App\Models\Task {#1098
          #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" => 1433480
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "field_page_start" => "69"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik/07-9"
            "field_display_title" => "9"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1099
              #items: array:1 [
                0 => App\Models\Term {#1048}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
            "field_metatags_description" => null
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            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1100
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1101
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                0 => App\Models\Branch {#1001}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1102
              #items: array:4 [
                0 => App\Models\Branch {#1001}
                1 => App\Models\Branch {#1052}
                2 => App\Models\Branch {#1060}
                3 => App\Models\Branch {#1073}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1103
              #items: array:2 [
                0 => App\Models\Element {#1104
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
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                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:7 [ …7]
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                  +timestamps: true
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                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Element {#1106
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
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                  #attributes: array:6 [ …6]
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                  #dateFormat: null
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                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1433481"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1433479"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1108
              #items: array:1 [
                0 => App\Models\Book {#997}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1434710"
              "type" => "book_page"
            ]
          ]
          #original: array:24 [
            "id" => 1433480
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "field_page_start" => "69"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik/07-9"
            "field_display_title" => "9"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1099}
            "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 {#1100}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1101}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1102}
            "content" => Illuminate\Database\Eloquent\Collection {#1103}
            "next" => array:2 [
              "refs" => "1433481"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1433479"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1108}
            "page" => array:2 [
              "refs" => "1434710"
              "type" => "book_page"
            ]
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
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          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        2 => App\Models\Task {#1109
          #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" => 1433481
            "created_at" => "2026-04-08 17:28:58"
            "updated_at" => null
            "field_page_start" => "69"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik/07-10"
            "field_display_title" => "10"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1110
              #items: array:1 [
                0 => App\Models\Term {#1048}
              ]
              #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 {#1111
              #items: []
              #escapeWhenCastingToString: false
            }
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1112
              #items: array:1 [
                0 => App\Models\Branch {#1001}
              ]
              #escapeWhenCastingToString: false
            }
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1113
              #items: array:4 [
                0 => App\Models\Branch {#1001}
                1 => App\Models\Branch {#1052}
                2 => App\Models\Branch {#1060}
                3 => App\Models\Branch {#1073}
              ]
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1114
              #items: array:2 [
                0 => App\Models\Element {#1115
                  #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]
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                  #changes: []
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                  #attributeCastCache: []
                  #dateFormat: null
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                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
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                  #guarded: array:1 [ …1]
                }
                1 => App\Models\Element {#1117
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
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                  #perPage: 15
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                  #escapeWhenCastingToString: false
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                  #original: array:6 [ …6]
                  #changes: []
                  #casts: []
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                  #attributeCastCache: []
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1433482"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1433480"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1119
              #items: array:1 [
                0 => App\Models\Book {#997}
              ]
              #escapeWhenCastingToString: false
            }
            "page" => array:2 [
              "refs" => "1434710"
              "type" => "book_page"
            ]
          ]
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            "id" => 1433481
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            "updated_at" => null
            "field_page_start" => "69"
            "field_page_end" => null
            "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik/07-10"
            "field_display_title" => "10"
            "field_outside_task" => null
            "field_task_type" => Illuminate\Database\Eloquent\Collection {#1110}
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
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            "breadcrumbs" => []
            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1111}
            "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1112}
            "parent_branches" => Illuminate\Database\Eloquent\Collection {#1113}
            "content" => Illuminate\Database\Eloquent\Collection {#1114}
            "next" => array:2 [
              "refs" => "1433482"
              "type" => "task"
            ]
            "previous" => array:2 [
              "refs" => "1433480"
              "type" => "task"
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1119}
            "page" => array:2 [
              "refs" => "1434710"
              "type" => "book_page"
            ]
          ]
          #changes: []
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          #attributeCastCache: []
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            0 => "*"
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      #escapeWhenCastingToString: false
    }
  ]
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    "id" => 1434468
    "created_at" => "2026-04-08 17:28:58"
    "updated_at" => null
    "field_page_start" => "69"
    "field_url" => "/9-klass/fizika/gendenshtejn-uchebnik/page-1-69"
    "field_display_title" => "69"
    "field_folder" => "1"
    "field_image_name" => "69"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#304}
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1034}
    "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 {#1035}
    "content" => Illuminate\Database\Eloquent\Collection {#1036}
    "next" => array:2 [
      "refs" => "1434469"
      "type" => "book_page"
    ]
    "previous" => array:2 [
      "refs" => "1434467"
      "type" => "book_page"
    ]
    "tasks" => Illuminate\Database\Eloquent\Collection {#1045}
  ]
  #changes: []
  #casts: []
  #classCastCache: []
  #attributeCastCache: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: []
  #touches: []
  +timestamps: true
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  #hidden: []
  #visible: []
  #fillable: []
  #guarded: array:1 [
    0 => "*"
  ]
}
Физика, 9 класс Учебник, авторы: Генденштейн Лев Элевич, Булатова Альбина Александрова, Корнильев Игорь Николаевич, Кошкина Анжелика Васильевна, издательство Бином, Москва, 2016, бирюзового цвета, Часть 1, страница 69
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