Question

Why does heat flows from a hot body to a cold body???

Answer 1

We have already seen that the flow of heat through conduction occurs when fast (hot) atoms collide with slow (cool) atoms, transferring some of their kinetic energy in the process.

Answer 2

hey mate here is your answer

The atoms of hot body have higher Kinetic Energy than that of cold body. So the atoms of hot body move and collide with the atoms of cold body and transfer heat. Since the atoms of cold body are at lower kinetic energy level hence they do not move and collide.

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