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July 28, 2015

Homework Help: physics--heat

Posted by lisa on Saturday, March 14, 2009 at 2:40am.

a piece of glass is 6mm thick and the coefficient of thermal conductivity of this glass is K=0.75Wm^-1K^-1.
if we add a 2nd identical piece of glass separated by an airgap of 5cm, the total thermal conduction will be reduced.
what is the ratio of heat transfer by conduction for the double pane to the single case.

K of air =0.023W m^-1K^-1

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