In an ideal Brayton cycle, air is compressed from 84 kPa and 25C to 840 kPa. Under cold air standard conditions, the thermal efficiency of this cycle is

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.

It indicates no change in temperature and the process of matter changing its state