a spring has a spring constant of 53N. How much elastic potential energy is stored in the spring when it is compressed by .21 m

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

Robin is swinging back and forth from a trapeze. in which of the following situations is his kinetic energy being transformed into potential energy