a) Calculate the conduction rate of heat H=deltaQ/deltaT through an A=2.0 m^2 glass window of the thickness of the glass is 4 mm and the temperature difference between the inside and the outside is 20 degree celsisus.
b) If a double layer window in which there is an air layer of 1.0 cm between the two glass layers is used what is the coreresponding conduction rate? assuming thermal conductivity is 0.8 W/m.k and 0.026 W/m.k respectively.