2.Какое количество теплоты необходимо для превращения в парт спирта массой 300 г взятой при температуре 780 С

1)

Давление газа вызывается ударами молекул о стенки сосуда, т. к. молекулы хаотически движутся и постоянно соударяются друг с другом и со всеми встреченным препятствиями.

2)

потому что на них действует сила притяжения Земли

3)

Дано:

S=500м

t=20мин

Найти:V-?

Формула для вычисления пути при равномерном движении S=V*t.Из нее выражаем скорость и подставляем значения:V=S/t=500/20=25м/с

ответ:25/с

4)

Вес тела: P = m · g

где g = 9,8 м/с² ≈ 10 м/с² - ускорение свободного падения;

Вес тела массой 4 кг: P = 4 · 10 = 40 (H)

Я только 5 не смог,а остальные все сделал

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