How Does a Thermos Flask Keep Things Hot or Cold?#thermos #flasks #chemistry #cold #heat
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YouTubeChemistry_k2823
How Does a Thermos Flask Keep Things Hot or Cold?#thermos #flasks #chemistry #cold #heat
Description:A thermos flask has double walls with a vacuum between them. This vacuum prevents heat transfer, so heat from hot liquids cannot escape and heat from outside cannot enter cold liquids.The inner surfaces are shiny, which reflects heat back inside and reduces heat loss by radiation.The tight-fitting lid stops air movement, preventing ...
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