Ametal ball of mass 100 g is heated to 90°c and then cooled to 25°c. the heat lost in the process is 2.5 kj. another metal ball of mass 200 g is heated to 90°c and then cooled to 25°c. the heat lost in the process is 5.0 kj. what can be concluded from the data?

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.