(Solved): A double pane window consists of two panes of glass held together by an air-filled space from each o ...

A double pane window consists of two panes of glass held together by an air-filled

space from each other

are separated.

(a) Show that the heat flow per unit time is given by

?Q/?t= A(T2 ? T1)/(l1/k1 + l2/k2 + l3/k3), where k1, k2 and k3 are the thermal conductivities

for glass, air or glass.