A cannon of mass 1500kg fires a cannon-ball of mass 5.0kg. The speed with which the ball leaves the cannon is 70m/s relative to the Earth. What is initial speed of recoil of the cannon

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.