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Heat transfer is a part of thermal engineering that deals with the generation, use, conversion, and exchange of thermal energy between physical systems.

Conduction: Transfer of heat by the direct collision of molecules.

Convection: Transfer of heat by carrying thermal energy along with the fluid being heated and moving away from the source.

Radiation: Transfer of heat by the emission of electromagnetic waves.

examples of heat transfer:

Conduction:

Touching a stove and being burned

Ice cooling down your hand

Boiling water by thrusting a red-hot piece of iron into it

Convection:

Hot air rising, cooling, and falling (convection currents)

An old-fashioned radiator (creates a convection cell in a room by emitting warm air at the top and drawing in cool air at the bottom).

Radiation:

Heat from the sun warming your face

Heat from a lightbulb

Heat from a fire

Heat from anything else which is warmer than its surroundings.

true.

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explanation: