Question

The physical quantity which determines the direction of the flow of heat energy when two bodies are brought into contact is ______

Answer 1

Temperature:

1. Temperature is the property that tell us how hot or cold a particular body.
2. It is defined as the average kinetic energy of all molecules.
3. Temperature determines the direction of flow of heat energy.

Hence, the physical quantity which determines the direction of the flow of heat energy when two bodies are brought into contact is temperature.