Question

How does heat transfer by convection?

Answer 1

Answer:

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Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it.

Convection above a hot surface occurs because hot air expands, becomes less dense, and rises (see Ideal Gas Law).

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Answer 2

Answer:

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Transfer of Heat - Conduction is heat transfer by means of molecular agitation within a material without any motion of the material as a whole.

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