При каком минимальном значении скорости свинцовая пуля при ударе о стенку может полностью расплавиться? Начальная температура пули 27°С, Температура плавления свинца 327°С, удельная теплота плавления свинца 25 кДж/кг, удельная теплоемкость 130 Дж/(кг К).

При каком минимальном значении скорости свинцовая пуля при ударе о стенку может полностью расплавиться? Начальная температура пули 27°С, Температура плавления свинца 327°С, удельная теплота плавления свинца 25 кДж/кг, удельная теплоемкость 130 Дж/(кг К).
- Предмет:
  Физика
- Автор:
  lukaskz1o
- 6 лет назад

Ответы 1

Закон сохранения энергииm*v^2/2 = c*m*dt + l*mv=√(2*c*dt+2*l) = √( 2*130*(327-27)+2*25000)= ~ 358 м/с
- Автор:
  romeronzsf
- 6 лет назад
- 0
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