Предмет: Физика, автор: dasaforostana96

Через провідник протягом 25 хв тече струм 5 А, і при цьому виділяється кількість теплоти 8 кДж. Який опір провідника?​

Ответы

Автор ответа: pomachdlyauchniv7
1
Щоб визначити опір провідника, можна скористатися законом Джоуля-Ленца, який стверджує, що кількість виділеної теплоти в провіднику пропорційна опору провідника, силі струму та квадрату часу:

Q = I^2 * R * t,

де Q - кількість виділеної теплоти (в джоулях),
I - сила струму (в амперах),
R - опір провідника (в омах),
t - час (в секундах).

У нашому випадку, ми знаємо, що сила струму I = 5 А, кількість виділеної теплоти Q = 8 кДж (8 * 10^3 Дж), а час t = 25 хв = 25 * 60 с = 1500 с.

Підставимо ці значення в формулу:

8 * 10^3 = (5^2) * R * 1500.

Розв'яжемо це рівняння для R:

R = (8 * 10^3) / (25 * 5^2 * 1500).

Обчисливши це вираз, отримаємо значення опору провідника R.

pomachdlyauchniv7: …+
Автор ответа: Cohendd
0

Ответ:

Объяснение:.....

Приложения:

vlattess: Добрый день, можете пожалуйста помочь с физикой? очень нужна ваша помощь
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Буду благодарна тому, кто решится помочь мне немного разгрести дистанционку. Кто бы ты ни был, ты - лучший)))