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.

What is the most useful equation for electric power?

A36,287 kg truck has a momentum of 907,175 kg • . what is the truck’s velocity

A50 kg student climbs 3 m to the top of a set of stairs. calculate the change in the student’s gravitational potential energy from the bottom to the top of the stairs. show your calculations and include units in your answer. how much total work does the student do while climbing the stairs? show your calculations or explain your reasoning. include units in your answer. it takes the student 30 s to climb to the top of the stairs. what is the average power generated by the student climbing the stairs? show your calculations and include units in your answer. the next day the student carries a 10 kg backpack up the same stairs and again takes 30 s to reach the top of the stairs. is the average power you calculated in part (c) greater than, less than, or equal to the average power the student generated the next day? explain your answer.