An energy-efficient double-paned window consists of two panes of glass, each with thickness L1 and thermal conductivity
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An energy-efficient double-paned window consists of two panes of glass, each with thickness L1 and thermal conductivity k1, separated by a layer of air of thickness L2 and thermal conductivity k2. Show that the equilibrium rate of heat flow through this window per unit area, A, is
![(T, – T;) Q At 2L 1/k, + L2/k2](https://dsd5zvtm8ll6.cloudfront.net/si.question.images/image/images15/1307-P-M-F-M(1351).png)
In this expression, T1 and T2 are the temperatures on either side of the window.
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