Question

What causes the liquid refrigerant in the cold end of a heat pipe to move back to the hot end?

A) an impulse pump.
B) gravity.
C) thermal action.
D) the 1st law of thermodynamics.
E) capillary action.

Answer 1

Answer: B) Gravity

Explanation: a condenser decreases the pressure of the refrigerant, which then causes the temperature to decrease. And a refrigerant getting colder means that the air around will be getting warmer. In an air conditioner, the condenser expels hot air — air that has stolen its energy from the refrigerant.

I think it is the answer, I hope it helps