Answer:
4. In physics, the second law of thermodynamics says that heat flows naturally from an object at a higher temperature to an object at a lower temperature, and heat doesn't flow in the opposite direction of its own accord. ... A heat engine turns heat into work.
5. Thermal siphon effect: heat flows from low temperature to high temperature. Heat energy spontaneously goes from higher temperature to lower temperature.
Explanation:
Hope it helps
