Something that accelerates undergoes a A. Change in velocity per unit time
B. Change in direction
C. Change.
D. Change in velocity

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another 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 •  

What is a subatomic particle with a negative charge and very little mass?