Страница 209 - гдз по физике 8 класс учебник Пёрышкин, Иванов

Физика, 8 класс Учебник, авторы: Пёрышкин И М, Иванов Александр Иванович, издательство Просвещение, Москва, 2021 - 2022, белого цвета

Авторы: Пёрышкин И. М., Иванов А. И.

Тип: Учебник

Издательство: Просвещение

Год издания: 2021 - 2022

Цвет обложки: белый

ISBN: 978-5-09-084611-0

Допущено Министерством просвещения Российской Федерации

Cтраница 209

App\Models\BookPage {#1003 // resources/views/models/book_page/default.blade.php
  #connection: "mysql"
  #table: "book_pages"
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  #attributes: array:21 [
    "id" => 1001306
    "created_at" => "2026-04-10 13:58:26"
    "updated_at" => null
    "field_page_start" => "209"
    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/page-209"
    "field_display_title" => "209"
    "field_folder" => "1"
    "field_image_name" => "209"
    "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1008
      #items: []
      #escapeWhenCastingToString: false
    }
    "field_weight" => "0"
    "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1038
      #items: array:1 [
        0 => App\Models\Book {#1006
          #connection: "mysql"
          #table: "books"
          #primaryKey: "id"
          #keyType: "int"
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            "field_subject" => Illuminate\Database\Eloquent\Collection {#1009
              #items: array:1 [
                0 => App\Models\Term {#1007
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
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                    "field_name" => "И"
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                1 => App\Models\Term {#1016
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                    "created_at" => "2026-04-10 13:58:26"
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                  ]
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                  ]
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            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1017
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                  ]
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            "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1034
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                0 => App\Models\Term {#1035
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                    "created_at" => "2026-04-10 13:58:26"
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                    ]
                    "field_translit" => "belyy"
                  ]
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                    "id" => 45
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "белый"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "белый"
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                      "field_nominative_case" => "белый"
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                    ]
                    "field_translit" => "belyy"
                  ]
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            ]
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            "id" => 597
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
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            "field_subject" => Illuminate\Database\Eloquent\Collection {#1009}
            "field_class" => Illuminate\Database\Eloquent\Collection {#1010}
            "field_publisher" => Illuminate\Database\Eloquent\Collection {#1012}
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            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1017}
            "field_book_type" => Illuminate\Database\Eloquent\Collection {#1018}
            "field_country" => Illuminate\Database\Eloquent\Collection {#1020}
            "field_city" => Illuminate\Database\Eloquent\Collection {#1022}
            "field_series" => Illuminate\Database\Eloquent\Collection {#1024}
            "field_umk" => Illuminate\Database\Eloquent\Collection {#1025}
            "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1026}
            "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1027}
            "field_publication_number" => null
            "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1029}
            "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1030}
            "field_under_the_edition_degree" => null
            "field_cover_description" => null
            "field_publication_year" => "2021"
            "field_publication_year_until" => "2022"
            "field_part" => ""
            "field_part_writing" => ""
            "field_second_foreign_language" => null
            "field_for_whom" => null
            "field_allowed" => "Допущено Министерством просвещения Российской Федерации"
            "field_reserve_field" => null
            "field_link_to_source" => null
            "field_tasks_count" => "704"
            "field_priority" => "4"
            "field_default_folder" => "/fizika_08/Peryshkin-u21/"
            "field_isbn" => "978-5-09-084611-0"
            "field_cover" => array:1 [
              0 => "/media/fizika_08/Peryshkin-u21/covers/cover1.webp?ts=1746809194"
            ]
            "field_cover_alts" => array:1 [
              0 => ""
            ]
            "field_covers" => array:1 [
              0 => array:4 [
                "path" => "/media/fizika_08/Peryshkin-u21/covers/cover1.webp?ts=1746809194"
                "alt" => ""
                "width" => "1200"
                "height" => "1576"
              ]
            ]
            "field_popular_book" => null
            "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1031}
            "field_new_book" => Illuminate\Database\Eloquent\Collection {#1032}
            "field_old_book" => Illuminate\Database\Eloquent\Collection {#1033}
            "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021"
            "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1034}
            "field_metatags_title" => null
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            "field_h1" => null
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            "breadcrumbs" => array:3 [
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            ]
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      #escapeWhenCastingToString: false
    }
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        0 => App\Models\Element {#1046
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                0 => App\Models\Edition {#1048
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                  #attributes: array:21 [
                    "id" => 4588
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1050
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                        0 => App\Models\Term {#1049
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #perPage: 15
                          +exists: true
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                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
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                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
                    "field_page_content_mode" => "image"
                    "field_content_text_checked" => null
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
                    "field_moderator" => "pasha"
                    "field_edition_type" => "statement"
                    "field_root_dir" => "0-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1051
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1052
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1053
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_content_source" => null
                  ]
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                    "id" => 4588
                    "created_at" => "2026-04-10 13:58:26"
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                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1050}
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
                    "field_page_content_mode" => "image"
                    "field_content_text_checked" => null
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
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                    "field_root_dir" => "0-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1051}
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1052}
                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1053}
                    "field_content_source" => null
                  ]
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                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "book_page" => array:2 [
              "refs" => "1001306"
              "type" => "book_page"
            ]
            "img" => array:1 [
              0 => array:5 [
                "name" => "209-1.jpg"
                "alt" => null
                "width" => "2050"
                "height" => 2627
                "path" => "/media/fizika_08/Peryshkin-u21/0-1/209-1.webp?ts=1747125501"
              ]
            ]
          ]
          #original: array:6 [
            "id" => 1179027
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1056}
            "book_page" => array:2 [
              "refs" => "1001306"
              "type" => "book_page"
            ]
            "img" => array:1 [
              0 => array:5 [
                "name" => "209-1.jpg"
                "alt" => null
                "width" => "2050"
                "height" => 2627
                "path" => "/media/fizika_08/Peryshkin-u21/0-1/209-1.webp?ts=1747125501"
              ]
            ]
          ]
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          #dateFormat: null
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          #visible: []
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            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "next" => Illuminate\Database\Eloquent\Collection {#4773
      #items: array:1 [
        0 => App\Models\BookPage {#4768
          #connection: "mysql"
          #table: "book_pages"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
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          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:21 [
            "id" => 1001307
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_page_start" => "210"
            "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/page-210"
            "field_display_title" => "210"
            "field_folder" => "1"
            "field_image_name" => "210"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#4771
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#4774
              #items: array:1 [
                0 => App\Models\Book {#1006}
              ]
              #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 {#4772
              #items: []
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#4788
              #items: array:1 [
                0 => App\Models\Element {#4787
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
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                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:6 [
                    "id" => 1179028
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#4789
                      #items: array:1 [
                        0 => App\Models\Edition {#1048}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "book_page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                    "img" => array:1 [
                      0 => array:5 [
                        "name" => "210-1.jpg"
                        "alt" => null
                        "width" => "2042"
                        "height" => 2621
                        "path" => "/media/fizika_08/Peryshkin-u21/0-1/210-1.webp?ts=1747125501"
                      ]
                    ]
                  ]
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                    "id" => 1179028
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#4789}
                    "book_page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                    "img" => array:1 [
                      0 => array:5 [
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                        "alt" => null
                        "width" => "2042"
                        "height" => 2621
                        "path" => "/media/fizika_08/Peryshkin-u21/0-1/210-1.webp?ts=1747125501"
                      ]
                    ]
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                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "next" => array:2 [
              "refs" => "1001308"
              "type" => "book_page"
            ]
            "previous" => array:2 [
              "refs" => "1001306"
              "type" => "book_page"
            ]
            "tasks" => Illuminate\Database\Eloquent\Collection {#4781
              #items: array:8 [
                0 => App\Models\Task {#4799
                  #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" => 1000984
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-1"
                    "field_display_title" => "1"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4803
                      #items: array:1 [
                        0 => App\Models\Term {#4800
                          #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 [ …6]
                          #original: array:6 [ …6]
                          #changes: []
                          #casts: []
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                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #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 {#4802
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4812
                      #items: array:1 [
                        0 => App\Models\Branch {#4811
                          #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 [ …24]
                          #original: array:24 [ …24]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4845
                      #items: array:3 [
                        0 => App\Models\Branch {#4855
                          #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 [ …24]
                          #original: array:24 [ …24]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                        1 => App\Models\Branch {#4859
                          #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 [ …24]
                          #original: array:24 [ …24]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                        2 => App\Models\Branch {#4863
                          #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 [ …24]
                          #original: array:24 [ …24]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#4843
                      #items: array:3 [
                        0 => App\Models\Element {#4830
                          #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 {#4836
                          #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]
                        }
                        2 => App\Models\Element {#4825
                          #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" => "1000985"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000983"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4839
                      #items: array:1 [
                        0 => App\Models\Book {#1006}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #original: array:24 [
                    "id" => 1000984
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-1"
                    "field_display_title" => "1"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4803}
                    "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 {#4802}
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4812}
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4845}
                    "content" => Illuminate\Database\Eloquent\Collection {#4843}
                    "next" => array:2 [
                      "refs" => "1000985"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000983"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4839}
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #changes: []
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                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
                1 => App\Models\Task {#4804
                  #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" => 1000985
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-2"
                    "field_display_title" => "2"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4852
                      #items: array:1 [
                        0 => App\Models\Term {#4800}
                      ]
                      #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 {#4840
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4838
                      #items: array:1 [
                        0 => App\Models\Branch {#4855}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4841
                      #items: array:3 [
                        0 => App\Models\Branch {#4855}
                        1 => App\Models\Branch {#4859}
                        2 => App\Models\Branch {#4863}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#4806
                      #items: array:3 [
                        0 => App\Models\Element {#4849
                          #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 {#4851
                          #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
                           …11
                        }
                        2 => App\Models\Element {#4850 …30}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "next" => array:2 [
                      "refs" => "1000986"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000984"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4805
                      #items: array:1 [
                        0 => App\Models\Book {#1006}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #original: array:24 [
                    "id" => 1000985
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-2"
                    "field_display_title" => "2"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4852}
                    "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 {#4840}
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4838}
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4841}
                    "content" => Illuminate\Database\Eloquent\Collection {#4806}
                    "next" => array:2 [
                      "refs" => "1000986"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000984"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4805}
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #changes: []
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                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #relations: []
                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
                2 => App\Models\Task {#4842
                  #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" => 1000986
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-3"
                    "field_display_title" => "3"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4808
                      #items: array:1 [
                        0 => App\Models\Term {#4800}
                      ]
                      #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 {#4801
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4846
                      #items: array:1 [
                        0 => App\Models\Branch {#4855}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4809
                      #items: array:3 [
                        0 => App\Models\Branch {#4855}
                        1 => App\Models\Branch {#4859}
                        2 => App\Models\Branch {#4863}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#4817
                      #items: array:3 [
                        0 => App\Models\Element {#4882 …30}
                        1 => App\Models\Element {#4880 …30}
                        2 => App\Models\Element {#4884 …30}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "next" => array:2 [
                      "refs" => "1000987"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000985"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4869
                      #items: array:1 [
                        0 => App\Models\Book {#1006}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #original: array:24 [
                    "id" => 1000986
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-3"
                    "field_display_title" => "3"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4808}
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
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                    "breadcrumbs" => []
                    "edition_groups" => Illuminate\Database\Eloquent\Collection {#4801}
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4846}
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4809}
                    "content" => Illuminate\Database\Eloquent\Collection {#4817}
                    "next" => array:2 [
                      "refs" => "1000987"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000985"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4869}
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #changes: []
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                  #attributeCastCache: []
                  #dateFormat: null
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                  #touches: []
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
                3 => App\Models\Task {#4807
                  #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" => 1000987
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-4"
                    "field_display_title" => "4"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4820
                      #items: array:1 [
                        0 => App\Models\Term {#4800}
                      ]
                      #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 {#4871
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4878
                      #items: array:1 [
                        0 => App\Models\Branch {#4855}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4870
                      #items: array:3 [
                        0 => App\Models\Branch {#4855}
                        1 => App\Models\Branch {#4859}
                        2 => App\Models\Branch {#4863}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#4866
                      #items: array:3 [
                        0 => App\Models\Element {#4896 …30}
                        1 => App\Models\Element {#4894 …30}
                        2 => App\Models\Element {#4898 …30}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "next" => array:2 [
                      "refs" => "1000988"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000986"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4891
                      #items: array:1 [
                        0 => App\Models\Book {#1006}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #original: array:24 [
                    "id" => 1000987
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-4"
                    "field_display_title" => "4"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4820}
                    "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 {#4871}
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4878}
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4870}
                    "content" => Illuminate\Database\Eloquent\Collection {#4866}
                    "next" => array:2 [
                      "refs" => "1000988"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000986"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4891}
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #changes: []
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                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
                4 => App\Models\Task {#4868
                  #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" => 1000988
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-5"
                    "field_display_title" => "5"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4867
                      #items: array:1 [
                        0 => App\Models\Term {#4800}
                      ]
                      #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 {#4890
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4892
                      #items: array:1 [
                        0 => App\Models\Branch {#4855}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4888
                      #items: array:3 [
                        0 => App\Models\Branch {#4855}
                        1 => App\Models\Branch {#4859}
                        2 => App\Models\Branch {#4863}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#4887
                      #items: array:3 [
                        0 => App\Models\Element {#4910 …30}
                        1 => App\Models\Element {#4908 …30}
                        2 => App\Models\Element {#4912 …30}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "next" => array:2 [
                      "refs" => "1000989"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000987"
                      "type" => "task"
                    ]
                    "book" => Illuminate\Database\Eloquent\Collection {#4905
                      #items: array:1 [
                        0 => App\Models\Book {#1006}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "page" => array:2 [
                      "refs" => "1001307"
                      "type" => "book_page"
                    ]
                  ]
                  #original: array:24 [
                    "id" => 1000988
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "210"
                    "field_page_end" => null
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik-2021/58-1-5"
                    "field_display_title" => "5"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4867}
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
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                    "field_description_bottom" => null
                    "field_match" => null
                    "breadcrumbs" => []
                    "edition_groups" => Illuminate\Database\Eloquent\Collection {#4890}
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4892}
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4888}
                    "content" => Illuminate\Database\Eloquent\Collection {#4887}
                    "next" => array:2 [
                      "refs" => "1000989"
                      "type" => "task"
                    ]
                    "previous" => array:2 [
                      "refs" => "1000987"
                      "type" => "task"
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                    "book" => Illuminate\Database\Eloquent\Collection {#4905}
                    "page" => array:2 [
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                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
                5 => App\Models\Task {#4889
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
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                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#4886
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                        0 => App\Models\Term {#4800}
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                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#4906
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                        0 => App\Models\Branch {#4855}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4983
                      #items: array:3 [
                        0 => App\Models\Branch {#4993 …30}
                        1 => App\Models\Branch {#4997 …30}
                        2 => App\Models\Branch {#5001 …30}
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                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#4976
                      #items: array:3 [
                        0 => App\Models\Element {#4969 …30}
                        1 => App\Models\Element {#4971 …30}
                        2 => App\Models\Element {#4968 …30}
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                    }
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                      "refs" => "1000990"
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                    "previous" => array:2 [
                      "refs" => "1000988"
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                    "book" => Illuminate\Database\Eloquent\Collection {#4975
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                        0 => App\Models\Book {#1006}
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                      #escapeWhenCastingToString: false
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                    0 => "*"
                  ]
                }
                6 => App\Models\Task {#4944
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
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                    "id" => 1000990
                    "created_at" => "2026-04-10 13:58:26"
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                        0 => App\Models\Branch {#4993 …30}
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                      #escapeWhenCastingToString: false
                    }
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4980
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                        0 => App\Models\Branch {#4993 …30}
                        1 => App\Models\Branch {#4997 …30}
                        2 => App\Models\Branch {#5001 …30}
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                    "content" => Illuminate\Database\Eloquent\Collection {#4981
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                        1 => App\Models\Element {#4957 …30}
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                    "book" => Illuminate\Database\Eloquent\Collection {#4961
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                        0 => App\Models\Book {#1006}
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                    0 => "*"
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                }
                7 => App\Models\Task {#4947
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                  #table: "tasks"
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                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#4962
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                    "content" => Illuminate\Database\Eloquent\Collection {#4964
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    "previous" => array:2 [
      "refs" => "1001305"
      "type" => "book_page"
    ]
    "tasks" => Illuminate\Database\Eloquent\Collection {#1039}
  ]
  #changes: []
  #casts: []
  #classCastCache: []
  #attributeCastCache: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: []
  #touches: []
  +timestamps: true
  +usesUniqueIds: false
  #hidden: []
  #visible: []
  #fillable: []
  #guarded: array:1 [
    0 => "*"
  ]
}
Физика, 8 класс Учебник, авторы: Пёрышкин И М, Иванов Александр Иванович, издательство Просвещение, Москва, 2021 - 2022, белого цвета, страница 209
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