Asingle pane window in your home has a thickness of 3 mm. assume it has an area a-1 m2. the outside temperature is 20 °c warmer than inside the house. (a) calculate the heat current (rate of heat flow) into the house by conduction through the glass window. (b) if you replace the single pane window with a double pane window (2 glass sheets similar to the one above, which are separated by an airspace of 3 mm), calculate the heat current into the house. assume no convection occurs in the airspace. (c) assume you replace the air between the windows with ar. calculate the heat current into the house. d) which window would be best for your house, and why?