Предмет: Физика, автор: 7asdfghj47

какую полезную работу способен совершить за 1 минуту электродвигатель мощностью 1,2 кВт если его КПД=75%?​ пожалуйста помогите

7asdfghj47: а решение?

Ответы

Автор ответа: ponchik01503
0

Дано:

t = 1 мин = 60 сек

P = 1,2 кВт

КПД = 75%

Найти:

А - ?

Решение:

1) А = P × t

A = 1,2 × 60 = 72 Дж.

Ответ: 72 Дж

ponchik01503: Правда не знаю зачем КПД дано... Или это я не так решила
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