Предмет: Физика, автор: kristinavasilje

При сгорании топлива в тепловом двигателе мощностью 1,2 кВт за 30 минут выделилась энергия 10,8 МДж. Определите КПД этого теплового двигателя.

Ответы

Автор ответа: KissaMiller

Pзатраченная=Q/t=10800000/1800=6000Вт=6кВт
Кпд=Pполезная/Pзатраченная=1,2/6=20%

Автор ответа: kristinavasilje

А где мы взяли число 1800?

Автор ответа: kristinavasilje

Спасибо:-)

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