Question

A windowpane is made of dash

Answer 1

Answer:

Two models of a windowpane are made. In one model, two identical glass panes of thickness 3 mm are separated with an air gap of 3 mm. This composite system is fixed in the window of a room. The other model consists of a single glass pane of thickness 6 mm, the temperature difference being the same as for the first model. The ratio of the heat flow for the double pane to that for the single pane is (K

glass

=2.5×10

−4

cal / m.

∘

C and K

air

=6.2×10

−6

cal/s.m.

∘

C)