Aball is rolling a 5 m/s down a hill the ball has 20 j of energy what is the mass of the ball
1.6kg
8kg
50kg

During the refrigeration cycle, what does the refrigerant do? absorbs and releases thermal energy by first vaporizing then condensing. absorbs and releases thermal energy by first condensing then vaporizing. insulates the thermal energy away from the cooling area. transfers thermal energy to the cooling area by condensing.