In the formula used to solve problems related to the first law of thermodynamics what does q represent?

The heat Q(in) supplied to the system in one stage of the cycle, minus the heat Q(out) removed from it in another stage of the cycle; plus the work added to the system W(in) equals the work that leaves the system W(out)

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.