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Does convection require a medium?

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Yes, convection requires a medium to transfer heat. In convection, in order to transfer heat, molecules have to move by their own. As it does, it removes or displaces cold air in its path. read more

Radiation, Conduction, Convection Describe the types of energy transfer that occur when you burn your bare feet when walking on hot sand. Radiation heats the sand, but the direct contact transfer of this energy to the bare foot is conduction. read more

Convection does not necessarily require direct contact. Convection refers to the heat transfer in liquids. It is conduction that requires the direct contact. read more

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