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Thermopane window is constructed, using two layers of glass 4.0 mm thick, separated by an air space of 5.0 mm.
if the temperature difference is 20° c from the inside of the house to the outside air, what is the rate of heat flow through this window?
(thermal conductivity for glass is 0.84 j/s⋅m⋅°c and for air 0.023 4 j/s⋅m⋅°c.)
a. 7 700 wb. 1 900 wc. 547 wd. 180 w
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