У залізній коробці масою 300 г хлопчик розплавив 200 г олова. Яка кількість теплоти пішла на нагрівання коробки, якщо початкова температура їх була 32оС? Температура плавлення олова 232оС. Питома теплоємність заліза 460 Дж/кг*С. Відповідь подайте у Дж.

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.

Hydrogen and helium are both members of?