a screw is a type of simple machine. if we look closely at a screw, we see that it is really a wrapped around a central core.

a) wedge
b) lever
c) fulcrum
d) inclined plane

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.