Предмет: Физика, автор: IvanYary

паяльник имеет сопротивление 440 ом и рассчитан на напряжение 220 в.какое количество теплоты выделит паяльник за 20 секунд

Ответы

Автор ответа: ẞßnkt

1

Q=U^2*t/R
Q=220*220*20/440=2200
Ответ 2200дж

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