What is convection , conduction & radiation?
Plz explain . .
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Answers
Answer:
Conduction is the process by which heat or electricity is directly transmitted through the material of a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
Convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Radiation is the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
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Convection- mode of transfer of heat in liquids and gases in which molecules themselves carry heat.
Conduction - mode of transfer of heat in solids in which it moves from molecule to molecule without any movement of the molecules themselves.
Radiation - mode of transfer of heat which does not require any material or medium
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