Предмет: Физика, автор: hdjdjdjd1ejjej

Спираль электроплитки, рассчитанной на напряжение 220 B, при силе тока 4 A выделила 800 кДж тепла. Сколько времени была включена плитка в сеть?

Ответы

Автор ответа: evgorlova

Количество теплоты
Q=IUt
Время t=Q/ IU= 800 ×10^3/( 220×4)=909 c= 15 минут 15 секунд
Ответ 909 с

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