Based on the magnetic field lines shown what is the orientation of the mystery magnet ?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

Newtons view of arrangement of the universe