Atrain is approaching you at very high speed as you stand next to the tracks. just as an observer on the train passes you, you both begin to play the same recorded version of a beethoven symphony on identical mp3 players.

according to you, whose mp3 player finishes the symphony first?
a. your player,
b. the observer's player,
c. both finish at the same time.

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?