Question

distinguish between radiation and convection


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Answer 1

Answer:

Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission.

Explanation:

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Answer 2

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Explanation:

Convection:

Convection is the transfer of internal energy into or out of an object by the physical movement of a surrounding fluid that transfers the internal energy along with its mass. Although the heat is initially transferred between the object and the fluid by conduction, the bulk transfer of energy comes from the motion of the fluid. Convection can arise spontaneously (or naturally or freely) through the creation of convection cells or can be forced by propelling the fluid across the object or by the object through the fluid.

Radiation:

Radiation is heat reaching you directly as infrared rays from a hot body. The higher the temperature of the body the more effective it is at giving off infrared, and ironically that piece of room-heating equipment known as a “radiator” is too low temperature to radiate very much heat away. Radiation is the only way heat can cross a vacuum and so it’s the only way we receive heat from the Sun (although it’s subsequently shared out by other means after reaching Earth).

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