A train travelling at 28m/s takes 3 seconds to pass Zarina. What is the distance of the train?

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Where do magnetic lines of force enter earth?