Double pane windows are often used to reduce heat loss in buildings. to illustrate this, consider the following problem. two 6 mm thick panes of glass are separated by a stagnant insulating argon gas. the panes are separated by 12mm, and the internal surfaces of the glass are at 25°c and 10°c. the thermal conductivities of glass and argon are 1.4 w/(m*k) and 0.017 w/(m*k), respectively. a) what is the rate of heat loss from a 1m x 0.5m window? b) what would the rate of heat loss be if only one pane of glass were used in this situation? assume that the temperatures on the external surfaces of the glass pane are 25°c and 10°c. c) why is the result in part a) so different from that in part b)?