Question

A single-pane window is a piece of glass 7.50 mm thick with conductivity 0.223 W/m-K. A double-pane window has the same area and is constructed of two single-panes with a layer of argon gas 9.00 mm thick in between the two panes. The conductivity of argon is
0.0179 W/m-K. Find the percentage by which the rate of heat flow would be reduced if the single-pane window was replaced by a double-pane window. Use R=x/kA

Answer: 94.1%

Answer 1