What is the best description of the energy stored in a stretched or compressed object?
gravitational potential
potential energy
elastic potential
spring constant

Positrons are spontaneously emitted from the nuclei of

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match