Какая масса каменного угля была сожжена в печи,если при этом выделилось 60 МДж теплоты?(удельная теплота сгорания угля 3*10 Дж/кг)

ПЕРЕВЕСТИ НА РУССКИЙ ЯЗЫК

1. but for her remark(замечание) they wouldn't have complained about the noise.

2. but for Tom's new job he would go on with his education.

3. but for my parents I would not have visited Paris.

4. but for the rain they would have gone out.

5. but for grandpa's hearing aid he would have no channel to the news.

6. but for Caroline's new friend I wouldn't feel that worried about her.

7. but for the conference Philip would never have come back to his native city.

Буду очень благодарен за помощь.

11.91. Заряд, создающий поле, уменьшили на rjj = 30%, расстояние до точки наблюдения увеличили на г\\2 = 20% . Как и на сколько тов изменилась напряженность электрического поля?

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