Обсуди с товарищем, страница 171 - гдз по физике 8 класс учебник Пёрышкин

Глава 2. Электрические явления. Параграф 46. Работа и мощность электрического тока. Вопросы после параграфа - страница 171.

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App\Models\Task {#1024 // resources/views/models/task/default.blade.php
  #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" => 599286
    "created_at" => "2026-04-10 13:58:26"
    "updated_at" => null
    "field_page_start" => "171"
    "field_page_end" => null
    "field_url" => "/8-klass/fizika/peryshkin-uchebnik/46-2-1"
    "field_display_title" => "Обсуди с товарищем"
    "field_outside_task" => null
    "field_task_type" => Illuminate\Database\Eloquent\Collection {#331
      #items: []
      #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 {#1029
      #items: []
      #escapeWhenCastingToString: false
    }
    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1026
      #items: array:1 [
        0 => App\Models\Branch {#342
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 598662
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Электрические явления"
            "field_branch_order" => "2"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1023
              #items: array:1 [
                0 => App\Models\Term {#333
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #withCount: []
                  +preventsLazyLoading: false
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                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 29
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Глава"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => null
                    "field_short_name" => null
                  ]
                  #original: array:7 [
                    "id" => 29
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Глава"
                    "field_cases" => array:6 [ …6]
                    "field_page_check_not_needed" => null
                    "field_short_name" => null
                  ]
                  #changes: []
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                  #dateFormat: null
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                  +timestamps: true
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                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "100"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1033
              #items: array:1 [
                0 => App\Models\Book {#1030
                  #connection: "mysql"
                  #table: "books"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:50 [
                    "id" => 51
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1032
                      #items: array:1 [
                        0 => App\Models\Term {#1034
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:10 [ …10]
                          #original: array:10 [ …10]
                          #changes: []
                          #casts: []
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                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
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                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1035
                      #items: array:1 [
                        0 => App\Models\Term {#1036
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #escapeWhenCastingToString: false
                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
                          #changes: []
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                          +timestamps: true
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                          #hidden: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1037
                      #items: array:1 [
                        0 => App\Models\Term {#1038
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
                          #changes: []
                          #casts: []
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                          #attributeCastCache: []
                          #dateFormat: null
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                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1039
                      #items: array:1 [
                        0 => App\Models\Term {#1040
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:12 [ …12]
                          #original: array:12 [ …12]
                          #changes: []
                          #casts: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1041
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1042
                      #items: array:1 [
                        0 => App\Models\Term {#1043
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:10 [ …10]
                          #original: array:10 [ …10]
                          #changes: []
                          #casts: []
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                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
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                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1044
                      #items: array:1 [
                        0 => App\Models\Term {#1045
                          #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: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1046
                      #items: array:1 [
                        0 => App\Models\Term {#1047
                          #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: []
                          #classCastCache: []
                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1048
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1049
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1050
                      #items: array:1 [
                        0 => App\Models\Term {#1051
                          #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
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                          #touches: []
                          +timestamps: true
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                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1052
                      #items: array:1 [
                        0 => App\Models\Term {#1053
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #perPage: 15
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                          #escapeWhenCastingToString: false
                          #attributes: array:10 [ …10]
                          #original: array:10 [ …10]
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                          #hidden: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => "3"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1054
                      #items: array:1 [
                        0 => App\Models\Term {#1055
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
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                          #escapeWhenCastingToString: false
                          #attributes: array:6 [ …6]
                          #original: array:6 [ …6]
                          #changes: []
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                          #attributeCastCache: []
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                          #hidden: []
                          #visible: []
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                          #guarded: array:1 [ …1]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1056
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => "с градусником"
                    "field_publication_year" => "2023"
                    "field_publication_year_until" => null
                    "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" => "706"
                    "field_priority" => "2"
                    "field_default_folder" => "/fizika_08/Peryshkin-u23/"
                    "field_isbn" => "978-5-09-102555-2"
                    "field_cover" => array:1 [
                      0 => "/media/fizika_08/Peryshkin-u23/covers/cover1.webp?ts=1737917825"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/fizika_08/Peryshkin-u23/covers/cover1.webp?ts=1737917825"
                        "alt" => ""
                        "width" => "1350"
                        "height" => "1772"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1057
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1058
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1059
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1060
                      #items: array:1 [
                        0 => App\Models\Term {#1061
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
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                          #attributes: array:6 [ …6]
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                        }
                      ]
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                    "field_metatags_title" => null
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                    ]
                  ]
                  #original: array:50 [
                    "id" => 51
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1032}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1035}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1037}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1039}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1041}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1042}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1044}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1046}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1048}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1049}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1050}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1052}
                    "field_publication_number" => "3"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1054}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1056}
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                    "field_cover_description" => "с градусником"
                    "field_publication_year" => "2023"
                    "field_publication_year_until" => null
                    "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
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                    "field_default_folder" => "/fizika_08/Peryshkin-u23/"
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                    "field_cover" => array:1 [
                      0 => "/media/fizika_08/Peryshkin-u23/covers/cover1.webp?ts=1737917825"
                    ]
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                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/fizika_08/Peryshkin-u23/covers/cover1.webp?ts=1737917825"
                        "alt" => ""
                        "width" => "1350"
                        "height" => "1772"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1057}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1058}
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1059}
                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1060}
                    "field_metatags_title" => null
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                    ]
                  ]
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    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1063
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        0 => App\Models\Branch {#1064
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                    "created_at" => "2026-04-10 13:58:26"
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                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1093 …2}
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                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1096 …2}
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                    "breadcrumbs" => array:3 [ …3]
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              ]
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            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1098
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          ]
        }
        1 => App\Models\Branch {#1099
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          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
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          #attributes: array:24 [
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                    "created_at" => "2026-04-10 13:58:26"
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [ …6]
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                0 => App\Models\Book {#1103
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            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1133
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                0 => App\Models\Branch {#1134
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
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                    "created_at" => "2026-04-10 13:58:26"
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                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1137 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1168 …2}
                  ]
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                    "id" => 598662
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                    "field_display_title" => "Электрические явления"
                    "field_branch_order" => "2"
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                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1135 …2}
                    "field_page_start" => "100"
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                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1137 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1168 …2}
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                    0 => "*"
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            "updated_at" => null
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            "field_branch_order" => "46"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1100}
            "field_page_start" => "169"
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            "book" => Illuminate\Database\Eloquent\Collection {#1102}
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            0 => "*"
          ]
        }
        2 => App\Models\Branch {#1169
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
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          #attributes: array:24 [
            "id" => 598727
            "created_at" => "2026-04-10 13:58:26"
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            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1170
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              #escapeWhenCastingToString: false
            }
            "field_page_start" => "171"
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            "book" => Illuminate\Database\Eloquent\Collection {#1171
              #items: array:1 [
                0 => App\Models\Book {#1172
                  #connection: "mysql"
                  #table: "books"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:50 [
                    "id" => 51
                    "created_at" => "2026-04-10 13:58:26"
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1173 …2}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1175 …2}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1177 …2}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1179 …2}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1181 …2}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1182 …2}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1184 …2}
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                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1189 …2}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1190 …2}
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                    "field_publication_number" => "3"
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1194 …2}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1196 …2}
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                    "field_cover_description" => "с градусником"
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                    "field_reserve_field" => null
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                    "field_tasks_count" => "706"
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                    "field_default_folder" => "/fizika_08/Peryshkin-u23/"
                    "field_isbn" => "978-5-09-102555-2"
                    "field_cover" => array:1 [ …1]
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                    "field_url" => "/8-klass/fizika/peryshkin-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1200 …2}
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                  ]
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                    "field_cover" => array:1 [ …1]
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            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1202
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                0 => App\Models\Branch {#1203
                  #connection: "mysql"
                  #table: "branches"
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                  #keyType: "int"
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      #escapeWhenCastingToString: false
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    "content" => Illuminate\Database\Eloquent\Collection {#1243
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            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1245
              #items: array:1 [
                0 => App\Models\Edition {#1246
                  #connection: "mysql"
                  #table: "editions"
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                  #keyType: "int"
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                  #attributes: array:21 [
                    "id" => 1636
                    "created_at" => "2026-04-10 13:58:26"
                     …19
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                  #original: array:21 [ …21]
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              ]
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            "task" => array:2 [
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              "type" => "task"
            ]
            "text" => "<p> Докажите, что <span class="long">1 Вт • ч = 3600 Дж. </span> </p>"
            "img" => array:1 [
              0 => array:5 [
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                "width" => "363"
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                "path" => "/media/fizika_08/Peryshkin-u23/0-46-2/1-1.webp?ts=1738081009"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1245}
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              "refs" => "599286"
              "type" => "task"
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              ]
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            0 => "*"
          ]
        }
        1 => App\Models\Element {#1252
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
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          #with: []
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          #attributes: array:6 [
            "id" => 746184
            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1253
              #items: array:1 [
                0 => App\Models\Edition {#1254
                  #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 [ …21]
                  #original: array:21 [ …21]
                  #changes: []
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                  #dateFormat: null
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "task" => array:2 [
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              "type" => "task"
            ]
            "img" => array:1 [
              0 => array:5 [
                "name" => "1-1.jpg"
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                "width" => "1045"
                "height" => 227
                "path" => "/media/fizika_08/Peryshkin-u23/1-46-2/1-1.webp?ts=1738081055"
              ]
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          ]
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            "edition" => Illuminate\Database\Eloquent\Collection {#1253}
            "task" => array:2 [
              "refs" => "599286"
              "type" => "task"
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            "img" => array:1 [
              0 => array:5 [
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        2 => App\Models\Element {#1260
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            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1261
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                  #attributes: array:21 [ …21]
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        3 => App\Models\Element {#1268
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            "id" => 1467091
            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1269
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                0 => App\Models\Edition {#1270
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            "text" => "<p><strong>Дано:</strong></p><p>Величина для анализа: $1 \text{ Вт} \cdot \text{ч}$.</p><p>Мощность $P = 1 \text{ Вт}$. Ватт (Вт) является единицей измерения мощности в системе СИ.<br>Время $t = 1 \text{ ч}$. Час (ч) является внесистемной единицей времени. Переведем ее в основную единицу СИ — секунду (с).<br>$1 \text{ ч} = 60 \text{ минут} = 60 \cdot 60 \text{ секунд} = 3600 \text{ с}$.</p><p><strong>Найти:</strong></p><p>Доказать, что $1 \text{ Вт} \cdot \text{ч} = 3600 \text{ Дж}$.</p><p><strong>Решение:</strong></p><p>Ватт-час (Вт·ч) — это единица измерения энергии (или работы). Она показывает, какое количество энергии вырабатывает или потребляет устройство мощностью 1 Ватт за 1 час непрерывной работы.</p><p>Энергия ($E$) связана с мощностью ($P$) и временем ($t$) формулой:</p><p>$E = P \cdot t$</p><p>По определению, мощность в 1 Ватт (Вт) — это такая мощность, при которой за 1 секунду (с) совершается работа в 1 Джоуль (Дж). Математически это выражается так:</p><p>$1 \text{ Вт} = \frac{1 \text{ Дж}}{1 \text{ с}}$</p><p>Мы уже установили, что 1 час равен 3600 секундам:</p><p>$1 \text{ ч} = 3600 \text{ с}$</p><p>Теперь подставим определения Ватта и часа (выраженные в единицах СИ) в исходное выражение $1 \text{ Вт} \cdot \text{ч}$:</p><p>$1 \text{ Вт} \cdot \text{ч} = \left(1 \frac{\text{Дж}}{\text{с}}\right) \cdot (3600 \text{ с})$</p><p>Как видно из выражения, единицы времени — секунды (с) — в числителе и знаменателе сокращаются:</p><p>$1 \text{ Вт} \cdot \text{ч} = 1 \cdot 3600 \cdot \frac{\text{Дж}}{\text{с}} \cdot \text{с} = 3600 \text{ Дж}$</p><p>Таким образом, мы доказали, что 1 Ватт-час эквивалентен 3600 Джоулям. Что и требовалось доказать.</p><p><strong>Ответ:</strong> Равенство $1 \text{ Вт} \cdot \text{ч} = 3600 \text{ Дж}$ является верным, так как $1 \text{ Вт} = 1 \text{ Дж/с}$, а $1 \text{ ч} = 3600 \text{ с}$, следовательно, их произведение равно $1 \text{ Дж/с} \cdot 3600 \text{ с} = 3600 \text{ Дж}$.</p>"
          ]
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            "id" => 1467091
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1269}
            "task" => array:2 [
              "refs" => "599286"
              "type" => "task"
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            "text" => "<p><strong>Дано:</strong></p><p>Величина для анализа: $1 \text{ Вт} \cdot \text{ч}$.</p><p>Мощность $P = 1 \text{ Вт}$. Ватт (Вт) является единицей измерения мощности в системе СИ.<br>Время $t = 1 \text{ ч}$. Час (ч) является внесистемной единицей времени. Переведем ее в основную единицу СИ — секунду (с).<br>$1 \text{ ч} = 60 \text{ минут} = 60 \cdot 60 \text{ секунд} = 3600 \text{ с}$.</p><p><strong>Найти:</strong></p><p>Доказать, что $1 \text{ Вт} \cdot \text{ч} = 3600 \text{ Дж}$.</p><p><strong>Решение:</strong></p><p>Ватт-час (Вт·ч) — это единица измерения энергии (или работы). Она показывает, какое количество энергии вырабатывает или потребляет устройство мощностью 1 Ватт за 1 час непрерывной работы.</p><p>Энергия ($E$) связана с мощностью ($P$) и временем ($t$) формулой:</p><p>$E = P \cdot t$</p><p>По определению, мощность в 1 Ватт (Вт) — это такая мощность, при которой за 1 секунду (с) совершается работа в 1 Джоуль (Дж). Математически это выражается так:</p><p>$1 \text{ Вт} = \frac{1 \text{ Дж}}{1 \text{ с}}$</p><p>Мы уже установили, что 1 час равен 3600 секундам:</p><p>$1 \text{ ч} = 3600 \text{ с}$</p><p>Теперь подставим определения Ватта и часа (выраженные в единицах СИ) в исходное выражение $1 \text{ Вт} \cdot \text{ч}$:</p><p>$1 \text{ Вт} \cdot \text{ч} = \left(1 \frac{\text{Дж}}{\text{с}}\right) \cdot (3600 \text{ с})$</p><p>Как видно из выражения, единицы времени — секунды (с) — в числителе и знаменателе сокращаются:</p><p>$1 \text{ Вт} \cdot \text{ч} = 1 \cdot 3600 \cdot \frac{\text{Дж}}{\text{с}} \cdot \text{с} = 3600 \text{ Дж}$</p><p>Таким образом, мы доказали, что 1 Ватт-час эквивалентен 3600 Джоулям. Что и требовалось доказать.</p><p><strong>Ответ:</strong> Равенство $1 \text{ Вт} \cdot \text{ч} = 3600 \text{ Дж}$ является верным, так как $1 \text{ Вт} = 1 \text{ Дж/с}$, а $1 \text{ ч} = 3600 \text{ с}$, следовательно, их произведение равно $1 \text{ Дж/с} \cdot 3600 \text{ с} = 3600 \text{ Дж}$.</p>"
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                  #attributes: array:6 [ …6]
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            "tasks" => Illuminate\Database\Eloquent\Collection {#1334
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                  #attributes: array:24 [ …24]
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                1 => App\Models\Task {#1434
                  #connection: "mysql"
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                2 => App\Models\Task {#1451
                  #connection: "mysql"
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                3 => App\Models\Task {#1468
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                4 => App\Models\Task {#1485
                  #connection: "mysql"
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                }
                5 => App\Models\Task {#1502
                  #connection: "mysql"
                  #table: "tasks"
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                }
                6 => App\Models\Task {#1517
                  #connection: "mysql"
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                  #attributes: array:24 [ …24]
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                7 => App\Models\Task {#1532
                  #connection: "mysql"
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                8 => App\Models\Task {#1557
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
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                9 => App\Models\Task {#1574
                  #connection: "mysql"
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Обсуди с товарищем (с. 171)

Просмотр Редак-ть Редак-ть (переопр)

Условие. Обсуди с товарищем (с. 171)

Редак-ть Редакция

скриншот условия

Докажите, что 1 Вт • ч = 3600 Дж.

Решение 1. Обсуди с товарищем (с. 171)

Редак-ть Редакция

Решение 3. Обсуди с товарищем (с. 171)

Редак-ть Редакция

Решение 4. Обсуди с товарищем (с. 171)

Редак-ть Редакция

Дано:

Величина для анализа: $1 \text{ Вт} \cdot \text{ч}$.

Мощность $P = 1 \text{ Вт}$. Ватт (Вт) является единицей измерения мощности в системе СИ.
Время $t = 1 \text{ ч}$. Час (ч) является внесистемной единицей времени. Переведем ее в основную единицу СИ — секунду (с).
$1 \text{ ч} = 60 \text{ минут} = 60 \cdot 60 \text{ секунд} = 3600 \text{ с}$.

Найти:

Доказать, что $1 \text{ Вт} \cdot \text{ч} = 3600 \text{ Дж}$.

Решение:

Ватт-час (Вт·ч) — это единица измерения энергии (или работы). Она показывает, какое количество энергии вырабатывает или потребляет устройство мощностью 1 Ватт за 1 час непрерывной работы.

Энергия ($E$) связана с мощностью ($P$) и временем ($t$) формулой:

$E = P \cdot t$

По определению, мощность в 1 Ватт (Вт) — это такая мощность, при которой за 1 секунду (с) совершается работа в 1 Джоуль (Дж). Математически это выражается так:

$1 \text{ Вт} = \frac{1 \text{ Дж}}{1 \text{ с}}$

Мы уже установили, что 1 час равен 3600 секундам:

$1 \text{ ч} = 3600 \text{ с}$

Теперь подставим определения Ватта и часа (выраженные в единицах СИ) в исходное выражение $1 \text{ Вт} \cdot \text{ч}$:

$1 \text{ Вт} \cdot \text{ч} = \left(1 \frac{\text{Дж}}{\text{с}}\right) \cdot (3600 \text{ с})$

Как видно из выражения, единицы времени — секунды (с) — в числителе и знаменателе сокращаются:

$1 \text{ Вт} \cdot \text{ч} = 1 \cdot 3600 \cdot \frac{\text{Дж}}{\text{с}} \cdot \text{с} = 3600 \text{ Дж}$

Таким образом, мы доказали, что 1 Ватт-час эквивалентен 3600 Джоулям. Что и требовалось доказать.

Ответ: Равенство $1 \text{ Вт} \cdot \text{ч} = 3600 \text{ Дж}$ является верным, так как $1 \text{ Вт} = 1 \text{ Дж/с}$, а $1 \text{ ч} = 3600 \text{ с}$, следовательно, их произведение равно $1 \text{ Дж/с} \cdot 3600 \text{ с} = 3600 \text{ Дж}$.