what is the medium in heat ch class 7
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Convective heat travels through a fluid. Molecules of a gas (air) or a liquid (water) become less dense and lighter when heated and rise. As the warmer molecules rise, the cooler ones sink to create convection currents. Radiant heat transfer takes place without a medium.
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the medium of heat is radiation, evaporation and also it get tranfer in contact to metal
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