Q. Suppose that you hear a clap of thunder 15.90 s after seeing the associated lightning stroke. The speed of sound waves in air is 343-m/s and the speed of light is 3 multiplied by 108 m/s. How far are you from the lightning stroke?
Q. A 7.00 kg bowling ball moves at 2.30m/s. How fast must a 2.60g Ping-Pong ball move so that the two balls have the same kinetic energy?