While the Apollo astronauts were on the Moon, 3.844 x 10 8 m away, they communicated using radio - w aves, which travel at the speed of light. The Earth’s atmosphere, which is about 160 - km thick, does not appreciably affect the speed of the signal. About how long will the ground controller have to wait from the end of a question to the start of an answe r, given that an astronaut takes 1s to respond?

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

What are some important factors to consider when choosing a warm-up before your workout?