Question

Explain how water at the top of the pan gets hot?

Answer 1

Convection:

1-Convection is the mode of heat transfer that occurs mostly in liquids and gases.

2-In convection heat transfer takes place with the actual motion of matter from one place within the body to the other.

3- When we boil water we see currents develop in the water on careful observation.

4- The hot water at the bottom becomes lighter and moves up forcing the cold and denser water at the top to come down and hence get heated up.

Hence, in this way, the water at the top layer is heated.