A bullet of mass 0.01 kg is fired from a rifle of mass 20 kg with a speed of hundred metre per second the recoil velocity of the rifle must be

10. the kinetic theory of matter states that atomic particles will move if the temperature is above the freezing temperature of water atomic particles bounce off each other one time in their life atomic particles are constantly bumping off each other because particles are in direct contact with each other at all times all matter is made up of atomic particles which are in constant random motion