Предмет: Физика, автор: dimakrasochkin

Тепловий двигун виконав корисну роботу, що дорівнює 3,8 МДж, і при цьому витратив 0,272 кг бензину. Обчисліть ККД цього двигуна.

Питома теплота згоряння бензину q=46 МДж/кг=46000000Дж/кг.

Відповідь заокругли до десятих.

Ответы

Автор ответа: dyexfnf
2

Ответ:

Объяснение:

Дано:

m = 0,272 кг

Aкор. = 3,8 МДж = 3800000 Дж

q = 46 МДж/кг = 46000000Дж/кг

Найти: η - ?

η = Aкор./Qповна * 100%

Кількість теплоти, яка виділяється при сгорянні палива

Qповна = q * m , тоді η = Aкор./q * m

η = (3800000/46000000 * 0,272) * 100% = 30,4%

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3. What does Frank hope will happen next year?
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