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Publish On: 2019-05-16

Guy white

Total Post: 819

Question: Describe how heat transfer may decrease the amount of heat flow

Reply On: 2014-02-06

lala singh

Total Post: 22

ANS: Describe how heat transfer may decrease the amount of heat flow

A thermos bottle illustrates how the principles of heat transfer may be used to decrease the amount of heat flowing into (or out of) a container. It consists of two bottles, one inside the other, touching each other only at the neck. The space between the two bottles is evacuated, and the surfaces are silvered. Transfer by conduction is minimized by using a very small area of a poorly conducting material; those due to convection are lessened by removing the air. The transfer by radiation is made small, because the polished silver acts as a poor emitter for one surface and a poor absorber for the other.

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