Acar traveled 1025 kilometers from el paso to dallas in 13.5 hours. what was it's average velocity?

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.)

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

What is an electric motor? explain its operation. 2-3 sentence