Question

what is convection? and define the word convection​

Answer 1

Answer:

Convection is the transfer of heat due to the bulk movement of molecules within fluids, including molten rock. Convection includes sub-mechanisms of advection, and diffusion. Convection cannot take place in most solids because neither bulk current flows nor significant diffusion of matter can take place.

the word convection means:-the transfer of heat by the circulation or movement of the heated parts of a liquid or gas. Meteorology. the vertical transport of atmospheric properties, especially upward (distinguished from advection). the act of conveying or transmitting.

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Answer 2

$\Huge{\bold{\mathrm{\underline{\red{ANSWER}}}}}$Convection, process by which heat is transferred by movement of a heated fluid such as air or water.

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Convection, process by which heat is transferred by movement of a heated fluid such as air or water.

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Natural convection results from the tendency of most fluids to expand when heated—i.e., to become less dense and to rise as a result of the increased buoyancy. Circulation caused by this effect accounts for the uniform heating of water in a kettle or air in a heated room: the heated molecules expand the space they move in through increased speed against one another, rise, and then cool and come closer together again, with increase in density and a resultant sinking.Forced convection involves the transport of fluid by methods other than that resulting from variation of density with temperature. Movement of air by a fan or of water by a pump are examples of forced convection.Atmospheric convection currents can be set up by local heating effects such as solar radiation (heating and rising) or contact with cold surface masses (cooling and sinking). Such convection currents primarily move vertically and account for many atmospheric phenomena, such as clouds and thunderstorms.

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