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Номер 5, страница 251 - гдз по физике 8 класс учебник Изергин
Авторы: Изергин Э. Т.
Тип: Учебник
Издательство: Русское слово
Год издания: 2019 - 2026
Цвет обложки: синий
ISBN: 978-5-533-01067-2
Популярные ГДЗ в 8 классе
Домашние экспериментальные задания - номер 5, страница 251.
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" => 1492611 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "251" "field_page_end" => null "field_url" => "/8-klass/fizika/izergin-uchebnik/dom-5" "field_display_title" => "5" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#331 #items: array:1 [ 0 => App\Models\Term {#1029 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #original: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1026 #items: [] #escapeWhenCastingToString: false } "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#342 #items: array:1 [ 0 => App\Models\Branch {#1023 #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" => 1492207 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Домашние экспериментальные задания" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#333 #items: [] #escapeWhenCastingToString: false } "field_page_start" => "249" "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 +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 4168 "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 [ "id" => 6493 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Физика" "field_abbreviated_name" => null "field_cases" => array:6 [ "field_accusative_case" => "физику" "field_creative_case" => "физикой" "field_dative_case" => "физике" "field_genitive_case" => "физики" "field_nominative_case" => "физика" "field_prepositional_case" => "физике" ] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "fizika" ] #original: array:10 [ "id" => 6493 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Физика" "field_abbreviated_name" => null "field_cases" => array:6 [ "field_accusative_case" => "физику" "field_creative_case" => "физикой" "field_dative_case" => "физике" "field_genitive_case" => "физики" "field_nominative_case" => "физика" "field_prepositional_case" => "физике" ] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "fizika" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_class" => Illuminate\Database\Eloquent\Collection {#1035 #items: array:1 [ 0 => App\Models\Term {#1036 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5457 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "8" "field_cases" => array:6 [ "field_accusative_case" => "восьмой" "field_creative_case" => "восьмым" "field_dative_case" => "восьмому" "field_genitive_case" => "восьмого" "field_nominative_case" => "восьмой" "field_prepositional_case" => "восьмом" ] "field_translit" => "vosmoj" ] #original: array:6 [ "id" => 5457 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "8" "field_cases" => array:6 [ "field_accusative_case" => "восьмой" "field_creative_case" => "восьмым" "field_dative_case" => "восьмому" "field_genitive_case" => "восьмого" "field_nominative_case" => "восьмой" "field_prepositional_case" => "восьмом" ] "field_translit" => "vosmoj" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_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: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5176 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Русское слово" "field_cases" => null "field_translit" => "russkoe slovo" ] #original: array:6 [ "id" => 5176 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Русское слово" "field_cases" => null "field_translit" => "russkoe slovo" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_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 [ "id" => 4491 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Изергин" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Эдуард" "field_patronymic" => "Тимофеевич" "field_surname_rp" => null ] #original: array:12 [ "id" => 4491 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Изергин" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Эдуард" "field_patronymic" => "Тимофеевич" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #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 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ "field_accusative_case" => "учебник" "field_creative_case" => "учебником" "field_dative_case" => "учебнику" "field_genitive_case" => "учебника" "field_nominative_case" => "учебник" "field_prepositional_case" => "учебнике" ] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #original: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ "field_accusative_case" => "учебник" "field_creative_case" => "учебником" "field_dative_case" => "учебнику" "field_genitive_case" => "учебника" "field_nominative_case" => "учебник" "field_prepositional_case" => "учебнике" ] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_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 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "rossiya" ] #original: array:6 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "rossiya" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_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 [ "id" => 15 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Москва" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "moskva" ] #original: array:6 [ "id" => 15 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Москва" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "moskva" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_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: [] #escapeWhenCastingToString: false } "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1051 #items: array:1 [ 0 => App\Models\Term {#1052 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6706 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (старый)" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_color" => null "field_end_year" => "2022" "field_start_year" => "2019" "field_translit" => "fgos-old" "field_type" => null ] #original: array:10 [ "id" => 6706 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (старый)" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_color" => null "field_end_year" => "2022" "field_start_year" => "2019" "field_translit" => "fgos-old" "field_type" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1053 #items: [] #escapeWhenCastingToString: false } "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1054 #items: [] #escapeWhenCastingToString: false } "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебник для 8 класса общеобразовательных организаций" "field_allowed" => null "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "417" "field_priority" => null "field_default_folder" => "/fizika_08/izergin-u/" "field_isbn" => "978-5-533-01067-2" "field_cover" => array:1 [ 0 => "/media/fizika_08/izergin-u/covers/cover1.webp?ts=1760998278" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/fizika_08/izergin-u/covers/cover1.webp?ts=1760998278" "alt" => "" "width" => "1608" "height" => "2576" ] ] "field_popular_book" => "0" "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1055 #items: [] #escapeWhenCastingToString: false } "field_new_book" => Illuminate\Database\Eloquent\Collection {#1056 #items: [] #escapeWhenCastingToString: false } "field_old_book" => Illuminate\Database\Eloquent\Collection {#1057 #items: [] #escapeWhenCastingToString: false } "field_url" => "/8-klass/fizika/izergin-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1058 #items: array:1 [ 0 => App\Models\Term {#1059 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 49 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "синий" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "siniy" ] #original: array:6 [ "id" => 49 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "синий" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "siniy" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ "class" => 379 "subject" => 556 "class_subject" => 492 ] ] #original: array:50 [ "id" => 4168 "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} "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 {#1051} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1053} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1054} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => "Учебник для 8 класса общеобразовательных организаций" "field_allowed" => null "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "417" "field_priority" => null "field_default_folder" => "/fizika_08/izergin-u/" "field_isbn" => "978-5-533-01067-2" "field_cover" => array:1 [ 0 => "/media/fizika_08/izergin-u/covers/cover1.webp?ts=1760998278" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/fizika_08/izergin-u/covers/cover1.webp?ts=1760998278" "alt" => "" "width" => "1608" "height" => "2576" ] ] "field_popular_book" => "0" "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1055} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1056} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1057} "field_url" => "/8-klass/fizika/izergin-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1058} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ "class" => 379 "subject" => 556 "class_subject" => 492 ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1060 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 1492207 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Домашние экспериментальные задания" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#333} "field_page_start" => "249" "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} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1060} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "parent_branches" => Illuminate\Database\Eloquent\Collection {#1061 #items: array:1 [ 0 => App\Models\Branch {#1023} ] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1062 #items: array:2 [ 0 => App\Models\Element {#1063 #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 [ "id" => 1774753 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1064 #items: array:1 [ 0 => App\Models\Edition {#1065 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 6496 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1066 #items: array:1 [ 0 => App\Models\Term {#1038} ] #escapeWhenCastingToString: false } "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "stas" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1067 #items: [] #escapeWhenCastingToString: false } "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1068 #items: [] #escapeWhenCastingToString: false } "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1069 #items: [] #escapeWhenCastingToString: false } "field_content_source" => null ] #original: array:21 [ "id" => 6496 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1066} "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "stas" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1067} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1068} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1069} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "1492611" "type" => "task" ] "text" => "<p>Задание 5</p><p><strong>Измерение влажности воздуха</strong></p><p><strong>Цель:</strong> научиться измерять влажность воздуха.</p><p><strong>Порядок выполнения</strong></p><p><strong>1.</strong> Посмотрите по комнатному термометру, чему равна температура в комнате. Показания термометра занесите в таблицу 29.</p><p><strong>2.</strong> Оберните шарик комнатного термометра кусочком бинта, смоченного водой комнатной температуры. Подождите, пока установится температура, и занесите её значение в таблицу.</p><p><strong>3.</strong> Найдите разность показаний сухого и влажного термометров.</p><p><strong>4.</strong> По психрометрической таблице в учебнике определите относительную влажность воздуха в комнате.</p><p>Таблица 29</p><p><strong>Температура воздуха в комнате, ${^\circ}C$</strong></p><p><strong>Показание влажного термометра, ${^\circ}C$</strong></p><p><strong>Разность показаний термометров, ${^\circ}C$</strong></p>" "img" => array:1 [ 0 => array:5 [ "name" => "5-1.jpg" "alt" => null "width" => "1528" "height" => 1447 "path" => "/media/fizika_08/izergin-u/0-dom/5-1.webp?ts=1761329280" ] ] ] #original: array:7 [ "id" => 1774753 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1064} "task" => array:2 [ "refs" => "1492611" "type" => "task" ] "text" => "<p>Задание 5</p><p><strong>Измерение влажности воздуха</strong></p><p><strong>Цель:</strong> научиться измерять влажность воздуха.</p><p><strong>Порядок выполнения</strong></p><p><strong>1.</strong> Посмотрите по комнатному термометру, чему равна температура в комнате. Показания термометра занесите в таблицу 29.</p><p><strong>2.</strong> Оберните шарик комнатного термометра кусочком бинта, смоченного водой комнатной температуры. Подождите, пока установится температура, и занесите её значение в таблицу.</p><p><strong>3.</strong> Найдите разность показаний сухого и влажного термометров.</p><p><strong>4.</strong> По психрометрической таблице в учебнике определите относительную влажность воздуха в комнате.</p><p>Таблица 29</p><p><strong>Температура воздуха в комнате, ${^\circ}C$</strong></p><p><strong>Показание влажного термометра, ${^\circ}C$</strong></p><p><strong>Разность показаний термометров, ${^\circ}C$</strong></p>" "img" => array:1 [ 0 => array:5 [ "name" => "5-1.jpg" "alt" => null "width" => "1528" "height" => 1447 "path" => "/media/fizika_08/izergin-u/0-dom/5-1.webp?ts=1761329280" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Element {#1070 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1851925 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1071 #items: array:1 [ 0 => App\Models\Edition {#1072 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 7014 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение" "field_order" => "2" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1073 #items: array:1 [ 0 => App\Models\Term {#1074 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 7012 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Gemini 2.5 Pro" "field_cases" => array:6 [ …6] "field_translit" => "gemini 2.5 pro" ] #original: array:6 [ "id" => 7012 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Gemini 2.5 Pro" "field_cases" => array:6 [ …6] "field_translit" => "gemini 2.5 pro" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "tolik" "field_edition_type" => "solution" "field_root_dir" => "1-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1075 #items: [] #escapeWhenCastingToString: false } "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1076 #items: [] #escapeWhenCastingToString: false } "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1077 #items: [] #escapeWhenCastingToString: false } "field_content_source" => null ] #original: array:21 [ "id" => 7014 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение" "field_order" => "2" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1073} "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "tolik" "field_edition_type" => "solution" "field_root_dir" => "1-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1075} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1076} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1077} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "1492611" "type" => "task" ] "text" => "<p>Для выполнения этого задания необходимо произвести измерения и расчеты, чтобы определить относительную влажность воздуха. Поскольку провести реальный эксперимент невозможно, ниже представлен пример выполнения с использованием типичных для жилой комнаты значений.</p><p><strong>1.</strong> Посмотрите по комнатному термометру, чему равна температура в комнате. Показания термометра занесите в таблицу 29.</p><p>Этот пункт описывает измерение температуры сухим термометром психрометра. Допустим, комнатный термометр показывает температуру $T_{сух} = 23^\circ\text{C}$. Это значение заносится в первую ячейку таблицы.</p><p><strong>Ответ:</strong> Температура воздуха в комнате (показания сухого термометра) равна $23^\circ\text{C}$.</p><p><strong>2.</strong> Оберните шарик комнатного термометра кусочком бинта, смоченного водой комнатной температуры. Подождите, пока установится температура, и занесите её значение в таблицу.</p><p>Это измерение температуры влажным термометром. За счет испарения воды с ткани термометр охлаждается. Скорость испарения, а значит и степень охлаждения, зависит от влажности воздуха: чем суше воздух, тем интенсивнее испарение и ниже показания влажного термометра. Предположим, что после стабилизации влажный термометр показал температуру $T_{вл} = 18^\circ\text{C}$. Заносим это значение во вторую ячейку таблицы.</p><p><strong>Ответ:</strong> Показания влажного термометра равны $18^\circ\text{C}$.</p><p><strong>3.</strong> Найдите разность показаний сухого и влажного термометров.</p><p>Для определения относительной влажности необходимо найти разность температур сухого и влажного термометров, $\Delta T$.</p><p>$ \Delta T = T_{сух} - T_{вл} $</p><p>Подставляем наши значения:</p><p>$ \Delta T = 23^\circ\text{C} - 18^\circ\text{C} = 5^\circ\text{C} $</p><p>Это значение заносится в третью ячейку таблицы.</p><p><strong>Ответ:</strong> Разность показаний термометров составляет $5^\circ\text{C}$.</p><p><strong>4.</strong> По психрометрической таблице в учебнике определите относительную влажность воздуха в комнате.</p><p>Относительную влажность воздуха ($\phi$, %) находят по психрометрической таблице. Для этого в левом столбце таблицы находят строку с температурой сухого термометра ($23^\circ\text{C}$), а в верхней строке – столбец с разностью температур ($5^\circ\text{C}$). Значение на пересечении строки и столбца и есть искомая влажность.</p><p><em>Пример фрагмента психрометрической таблицы:</em></p><div class="table-wrap"><table border="1" style="border: 1px solid rgb(0, 0, 0);"><thead><tr><th rowspan="2" style="border: 1px solid rgb(0, 0, 0);">Температура по сухому термометру, °C</th><th colspan="6" style="border: 1px solid rgb(0, 0, 0);">Разность температур по сухому и влажному термометрам, °C</th></tr><tr><th style="border: 1px solid rgb(0, 0, 0);">2</th><th style="border: 1px solid rgb(0, 0, 0);">3</th><th style="border: 1px solid rgb(0, 0, 0);">4</th><th style="border: 1px solid rgb(0, 0, 0);">5</th><th style="border: 1px solid rgb(0, 0, 0);">6</th><th style="border: 1px solid rgb(0, 0, 0);">7</th></tr></thead><tbody><tr><td style="border: 1px solid rgb(0, 0, 0);">22</td><td style="border: 1px solid rgb(0, 0, 0);">82</td><td style="border: 1px solid rgb(0, 0, 0);">73</td><td style="border: 1px solid rgb(0, 0, 0);">65</td><td style="border: 1px solid rgb(0, 0, 0);">58</td><td style="border: 1px solid rgb(0, 0, 0);">50</td><td style="border: 1px solid rgb(0, 0, 0);">43</td></tr><tr><td style="border: 1px solid rgb(0, 0, 0);"><strong>23</strong></td><td style="border: 1px solid rgb(0, 0, 0);">83</td><td style="border: 1px solid rgb(0, 0, 0);">74</td><td style="border: 1px solid rgb(0, 0, 0);">66</td><td style="border: 1px solid rgb(0, 0, 0);"><strong>59</strong></td><td style="border: 1px solid rgb(0, 0, 0);">52</td><td style="border: 1px solid rgb(0, 0, 0);">45</td></tr><tr><td style="border: 1px solid rgb(0, 0, 0);">24</td><td style="border: 1px solid rgb(0, 0, 0);">83</td><td style="border: 1px solid rgb(0, 0, 0);">75</td><td style="border: 1px solid rgb(0, 0, 0);">67</td><td style="border: 1px solid rgb(0, 0, 0);">60</td><td style="border: 1px solid rgb(0, 0, 0);">53</td><td style="border: 1px solid rgb(0, 0, 0);">46</td></tr></tbody></table></div><p>Из таблицы видно, что на пересечении строки «23» и столбца «5» находится число 59. Следовательно, относительная влажность воздуха составляет 59%.</p><p><strong>Ответ:</strong> Относительная влажность воздуха в комнате равна 59%.</p><p>Итоговая заполненная таблица 29:</p><div class="table-wrap"><table border="1" style="border: 1px solid rgb(0, 0, 0);"><thead><tr><th style="border: 1px solid rgb(0, 0, 0);">Температура воздуха в комнате, °C</th><th style="border: 1px solid rgb(0, 0, 0);">Показание влажного термометра, °C</th><th style="border: 1px solid rgb(0, 0, 0);">Разность показаний термометров, °C</th></tr></thead><tbody><tr><td style="border: 1px solid rgb(0, 0, 0);">23</td><td style="border: 1px solid rgb(0, 0, 0);">18</td><td style="border: 1px solid rgb(0, 0, 0);">5</td></tr></tbody></table></div>" ] #original: array:6 [ "id" => 1851925 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1071} "task" => array:2 [ "refs" => "1492611" "type" => "task" ] "text" => "<p>Для выполнения этого задания необходимо произвести измерения и расчеты, чтобы определить относительную влажность воздуха. Поскольку провести реальный эксперимент невозможно, ниже представлен пример выполнения с использованием типичных для жилой комнаты значений.</p><p><strong>1.</strong> Посмотрите по комнатному термометру, чему равна температура в комнате. Показания термометра занесите в таблицу 29.</p><p>Этот пункт описывает измерение температуры сухим термометром психрометра. Допустим, комнатный термометр показывает температуру $T_{сух} = 23^\circ\text{C}$. Это значение заносится в первую ячейку таблицы.</p><p><strong>Ответ:</strong> Температура воздуха в комнате (показания сухого термометра) равна $23^\circ\text{C}$.</p><p><strong>2.</strong> Оберните шарик комнатного термометра кусочком бинта, смоченного водой комнатной температуры. Подождите, пока установится температура, и занесите её значение в таблицу.</p><p>Это измерение температуры влажным термометром. За счет испарения воды с ткани термометр охлаждается. Скорость испарения, а значит и степень охлаждения, зависит от влажности воздуха: чем суше воздух, тем интенсивнее испарение и ниже показания влажного термометра. Предположим, что после стабилизации влажный термометр показал температуру $T_{вл} = 18^\circ\text{C}$. Заносим это значение во вторую ячейку таблицы.</p><p><strong>Ответ:</strong> Показания влажного термометра равны $18^\circ\text{C}$.</p><p><strong>3.</strong> Найдите разность показаний сухого и влажного термометров.</p><p>Для определения относительной влажности необходимо найти разность температур сухого и влажного термометров, $\Delta T$.</p><p>$ \Delta T = T_{сух} - T_{вл} $</p><p>Подставляем наши значения:</p><p>$ \Delta T = 23^\circ\text{C} - 18^\circ\text{C} = 5^\circ\text{C} $</p><p>Это значение заносится в третью ячейку таблицы.</p><p><strong>Ответ:</strong> Разность показаний термометров составляет $5^\circ\text{C}$.</p><p><strong>4.</strong> По психрометрической таблице в учебнике определите относительную влажность воздуха в комнате.</p><p>Относительную влажность воздуха ($\phi$, %) находят по психрометрической таблице. Для этого в левом столбце таблицы находят строку с температурой сухого термометра ($23^\circ\text{C}$), а в верхней строке – столбец с разностью температур ($5^\circ\text{C}$). Значение на пересечении строки и столбца и есть искомая влажность.</p><p><em>Пример фрагмента психрометрической таблицы:</em></p><div class="table-wrap"><table border="1" style="border: 1px solid rgb(0, 0, 0);"><thead><tr><th rowspan="2" style="border: 1px solid rgb(0, 0, 0);">Температура по сухому термометру, °C</th><th colspan="6" style="border: 1px solid rgb(0, 0, 0);">Разность температур по сухому и влажному термометрам, °C</th></tr><tr><th style="border: 1px solid rgb(0, 0, 0);">2</th><th style="border: 1px solid rgb(0, 0, 0);">3</th><th style="border: 1px solid rgb(0, 0, 0);">4</th><th style="border: 1px solid rgb(0, 0, 0);">5</th><th style="border: 1px solid rgb(0, 0, 0);">6</th><th style="border: 1px solid rgb(0, 0, 0);">7</th></tr></thead><tbody><tr><td style="border: 1px solid rgb(0, 0, 0);">22</td><td style="border: 1px solid rgb(0, 0, 0);">82</td><td style="border: 1px solid rgb(0, 0, 0);">73</td><td style="border: 1px solid rgb(0, 0, 0);">65</td><td style="border: 1px solid rgb(0, 0, 0);">58</td><td style="border: 1px solid rgb(0, 0, 0);">50</td><td style="border: 1px solid rgb(0, 0, 0);">43</td></tr><tr><td style="border: 1px solid rgb(0, 0, 0);"><strong>23</strong></td><td style="border: 1px solid rgb(0, 0, 0);">83</td><td style="border: 1px solid rgb(0, 0, 0);">74</td><td style="border: 1px solid rgb(0, 0, 0);">66</td><td style="border: 1px solid rgb(0, 0, 0);"><strong>59</strong></td><td style="border: 1px solid rgb(0, 0, 0);">52</td><td style="border: 1px solid rgb(0, 0, 0);">45</td></tr><tr><td style="border: 1px solid rgb(0, 0, 0);">24</td><td style="border: 1px solid rgb(0, 0, 0);">83</td><td style="border: 1px solid rgb(0, 0, 0);">75</td><td style="border: 1px solid rgb(0, 0, 0);">67</td><td style="border: 1px solid rgb(0, 0, 0);">60</td><td style="border: 1px solid rgb(0, 0, 0);">53</td><td style="border: 1px solid rgb(0, 0, 0);">46</td></tr></tbody></table></div><p>Из таблицы видно, что на пересечении строки «23» и столбца «5» находится число 59. Следовательно, относительная влажность воздуха составляет 59%.</p><p><strong>Ответ:</strong> Относительная влажность воздуха в комнате равна 59%.</p><p>Итоговая заполненная таблица 29:</p><div class="table-wrap"><table border="1" style="border: 1px solid rgb(0, 0, 0);"><thead><tr><th style="border: 1px solid rgb(0, 0, 0);">Температура воздуха в комнате, °C</th><th style="border: 1px solid rgb(0, 0, 0);">Показание влажного термометра, °C</th><th style="border: 1px solid rgb(0, 0, 0);">Разность показаний термометров, °C</th></tr></thead><tbody><tr><td style="border: 1px solid rgb(0, 0, 0);">23</td><td style="border: 1px solid rgb(0, 0, 0);">18</td><td style="border: 1px solid rgb(0, 0, 0);">5</td></tr></tbody></table></div>" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "1492612" "type" => "task" ] "previous" => array:2 [ "refs" => "1492610" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1078 #items: array:1 [ 0 => App\Models\Book {#1030} ] #escapeWhenCastingToString: false } "page" => Illuminate\Database\Eloquent\Collection {#1238 #items: array:1 [ 0 => App\Models\BookPage {#1083 #connection: "mysql" #table: "book_pages" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 1492143 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "251" "field_url" => "/8-klass/fizika/izergin-uchebnik/page-251" "field_display_title" => "251" "field_folder" => "1" "field_image_name" => "251" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1086 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null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #original: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" …8 ] #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_country" => Illuminate\Database\Eloquent\Collection {#1099 #items: array:1 [ 0 => App\Models\Term {#1100 #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: [] 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"field_allowed" => null "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "417" "field_priority" => null "field_default_folder" => "/fizika_08/izergin-u/" "field_isbn" => "978-5-533-01067-2" "field_cover" => array:1 [ 0 => "/media/fizika_08/izergin-u/covers/cover1.webp?ts=1760998278" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/fizika_08/izergin-u/covers/cover1.webp?ts=1760998278" "alt" => "" "width" => "1608" "height" => "2576" ] ] "field_popular_book" => "0" "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1110} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1111} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1112} "field_url" => "/8-klass/fizika/izergin-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1113} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ "class" => 379 "subject" => 556 "class_subject" => 492 ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "edition_groups" => Illuminate\Database\Eloquent\Collection {#1115 #items: [] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1116 #items: array:1 [ 0 => App\Models\Element {#1117 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1775044 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1118 #items: array:1 [ 0 => App\Models\Edition {#1119 #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: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "book_page" => array:2 [ "refs" => "1492143" "type" => "book_page" ] "img" => array:1 [ 0 => array:5 [ "name" => "251-1.jpg" "alt" => null "width" => "1901" "height" => 2557 "path" => "/media/fizika_08/izergin-u/0-1/251-1.webp?ts=1761329779" ] ] ] #original: array:6 [ "id" => 1775044 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1118} "book_page" => array:2 [ "refs" => "1492143" "type" => "book_page" ] "img" => array:1 [ 0 => array:5 [ "name" => "251-1.jpg" "alt" => null "width" => "1901" "height" => 2557 "path" => "/media/fizika_08/izergin-u/0-1/251-1.webp?ts=1761329779" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "1492144" "type" => "book_page" ] "previous" => array:2 [ "refs" => "1492142" "type" => "book_page" ] "tasks" => Illuminate\Database\Eloquent\Collection {#1125 #items: array:2 [ 0 => App\Models\Task {#1126 #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" => 1492610 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "250" "field_page_end" => "251" "field_url" => "/8-klass/fizika/izergin-uchebnik/dom-4" "field_display_title" => "4" "field_outside_task" => "0" "field_task_type" => Illuminate\Database\Eloquent\Collection {#1127 #items: array:1 [ 0 => App\Models\Term {#1128 #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_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 {#1129 #items: [] #escapeWhenCastingToString: false } "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1130 #items: array:1 [ 0 => App\Models\Branch {#1131 #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 {#1163 #items: array:1 [ 0 => App\Models\Branch {#1131} ] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1164 #items: array:2 [ 0 => App\Models\Element {#1165 #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 {#1172 #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" => "1492611" "type" => "task" ] "previous" => array:2 [ "refs" => "1492609" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1180 #items: array:1 [ 0 => App\Models\Book {#1134 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ …50] #original: array:50 [ …50] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "page" => array:2 [ "refs" => "1492142" "type" => "book_page" ] ] #original: array:24 [ "id" => 1492610 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "250" "field_page_end" => "251" "field_url" => "/8-klass/fizika/izergin-uchebnik/dom-4" "field_display_title" => "4" "field_outside_task" => "0" "field_task_type" => Illuminate\Database\Eloquent\Collection {#1127} "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 {#1129} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1130} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1163} "content" => Illuminate\Database\Eloquent\Collection {#1164} "next" => array:2 [ "refs" => "1492611" "type" => "task" ] "previous" => array:2 [ "refs" => "1492609" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1180} "page" => array:2 [ "refs" => "1492142" "type" => "book_page" ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Task {#1181 #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" => 1492611 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "251" "field_page_end" => null "field_url" => "/8-klass/fizika/izergin-uchebnik/dom-5" "field_display_title" => "5" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1182 #items: array:1 [ 0 => App\Models\Term {#1183 #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_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 {#1184 #items: [] #escapeWhenCastingToString: false } "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1185 #items: array:1 [ 0 => App\Models\Branch {#1186 #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 {#1218 #items: array:1 [ 0 => App\Models\Branch {#1186} ] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1219 #items: array:2 [ 0 => App\Models\Element {#1220 #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 {#1227 #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" => "1492612" "type" => "task" ] "previous" => array:2 [ "refs" => "1492610" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1235 #items: array:1 [ 0 => App\Models\Book {#1189 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ …50] #original: array:50 [ …50] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "page" => array:2 [ "refs" => "1492143" "type" => "book_page" ] ] #original: array:24 [ "id" => 1492611 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "251" "field_page_end" => null "field_url" => "/8-klass/fizika/izergin-uchebnik/dom-5" "field_display_title" => "5" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1182} "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 {#1184} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1185} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1218} "content" => Illuminate\Database\Eloquent\Collection {#1219} "next" => array:2 [ "refs" => "1492612" "type" => "task" ] "previous" => array:2 [ "refs" => "1492610" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1235} "page" => array:2 [ "refs" => "1492143" "type" => "book_page" ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:21 [ "id" => 1492143 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "251" "field_url" => "/8-klass/fizika/izergin-uchebnik/page-251" "field_display_title" => "251" "field_folder" => "1" "field_image_name" => "251" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1086} "field_weight" => "0" "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1085} "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 {#1115} "content" => Illuminate\Database\Eloquent\Collection {#1116} "next" => array:2 [ "refs" => "1492144" "type" => "book_page" ] "previous" => array:2 [ "refs" => "1492142" "type" => "book_page" ] "tasks" => Illuminate\Database\Eloquent\Collection {#1125} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 1492611 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "251" "field_page_end" => null "field_url" => "/8-klass/fizika/izergin-uchebnik/dom-5" "field_display_title" => "5" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#331} "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 {#1026} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#342} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1061} "content" => Illuminate\Database\Eloquent\Collection {#1062} "next" => array:2 [ "refs" => "1492612" "type" => "task" ] "previous" => array:2 [ "refs" => "1492610" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1078} "page" => array:2 [ "refs" => "1492143" "type" => "book_page" ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] }
№5 (с. 251)
Условие. №5 (с. 251)
скриншот условия
Задание 5
Измерение влажности воздуха
Цель: научиться измерять влажность воздуха.
Порядок выполнения
1. Посмотрите по комнатному термометру, чему равна температура в комнате. Показания термометра занесите в таблицу 29.
2. Оберните шарик комнатного термометра кусочком бинта, смоченного водой комнатной температуры. Подождите, пока установится температура, и занесите её значение в таблицу.
3. Найдите разность показаний сухого и влажного термометров.
4. По психрометрической таблице в учебнике определите относительную влажность воздуха в комнате.
Таблица 29
Температура воздуха в комнате, ${^\circ}C$
Показание влажного термометра, ${^\circ}C$
Разность показаний термометров, ${^\circ}C$
Решение. №5 (с. 251)
Для выполнения этого задания необходимо произвести измерения и расчеты, чтобы определить относительную влажность воздуха. Поскольку провести реальный эксперимент невозможно, ниже представлен пример выполнения с использованием типичных для жилой комнаты значений.
1. Посмотрите по комнатному термометру, чему равна температура в комнате. Показания термометра занесите в таблицу 29.
Этот пункт описывает измерение температуры сухим термометром психрометра. Допустим, комнатный термометр показывает температуру $T_{сух} = 23^\circ\text{C}$. Это значение заносится в первую ячейку таблицы.
Ответ: Температура воздуха в комнате (показания сухого термометра) равна $23^\circ\text{C}$.
2. Оберните шарик комнатного термометра кусочком бинта, смоченного водой комнатной температуры. Подождите, пока установится температура, и занесите её значение в таблицу.
Это измерение температуры влажным термометром. За счет испарения воды с ткани термометр охлаждается. Скорость испарения, а значит и степень охлаждения, зависит от влажности воздуха: чем суше воздух, тем интенсивнее испарение и ниже показания влажного термометра. Предположим, что после стабилизации влажный термометр показал температуру $T_{вл} = 18^\circ\text{C}$. Заносим это значение во вторую ячейку таблицы.
Ответ: Показания влажного термометра равны $18^\circ\text{C}$.
3. Найдите разность показаний сухого и влажного термометров.
Для определения относительной влажности необходимо найти разность температур сухого и влажного термометров, $\Delta T$.
$ \Delta T = T_{сух} - T_{вл} $
Подставляем наши значения:
$ \Delta T = 23^\circ\text{C} - 18^\circ\text{C} = 5^\circ\text{C} $
Это значение заносится в третью ячейку таблицы.
Ответ: Разность показаний термометров составляет $5^\circ\text{C}$.
4. По психрометрической таблице в учебнике определите относительную влажность воздуха в комнате.
Относительную влажность воздуха ($\phi$, %) находят по психрометрической таблице. Для этого в левом столбце таблицы находят строку с температурой сухого термометра ($23^\circ\text{C}$), а в верхней строке – столбец с разностью температур ($5^\circ\text{C}$). Значение на пересечении строки и столбца и есть искомая влажность.
Пример фрагмента психрометрической таблицы:
| Температура по сухому термометру, °C | Разность температур по сухому и влажному термометрам, °C | |||||
|---|---|---|---|---|---|---|
| 2 | 3 | 4 | 5 | 6 | 7 | |
| 22 | 82 | 73 | 65 | 58 | 50 | 43 |
| 23 | 83 | 74 | 66 | 59 | 52 | 45 |
| 24 | 83 | 75 | 67 | 60 | 53 | 46 |
Из таблицы видно, что на пересечении строки «23» и столбца «5» находится число 59. Следовательно, относительная влажность воздуха составляет 59%.
Ответ: Относительная влажность воздуха в комнате равна 59%.
Итоговая заполненная таблица 29:
| Температура воздуха в комнате, °C | Показание влажного термометра, °C | Разность показаний термометров, °C |
|---|---|---|
| 23 | 18 | 5 |
Другие задания:
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