Heat Temperature Conduction Convection Radiation

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Presentation transcript:

Heat Temperature Conduction Convection Radiation Heat and Heat Transfer Heat Temperature Conduction Convection Radiation

Convection Heat transfer by movement of particles or molecules Fluids (liquids and Gases) Mechanism Hot fluid becomes less dense and rises Cold fluid is more dense and sinks Convection current Examples

Radiation Heat transfer without use of a medium Electromagnetic radiation Infra-red radiation Microwave Mechanism Emission of electromagnetic radiation

Surfaces and Radiation Black Surface Good radiator, good absorber White surface (Good reflector) bad absorber, bad radiator Silver Surface Very good reflector, bad absorber

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