A micrometeorite 0.001 m in diameter runs into the Moon at 5,000 m/s. The magnitude of the force exerted by the Moon on the micrometeorite is:

A.
smaller than the magnitude of
the force exerted by the micrometeorite on the Moon.
greater than the magnitude of

B.
the force exerted by the micrometeorite on the Moon.

C.
the same magnitude as the force exerted by the micrometeorite on the Moon.

D.
zero.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.