5. Consider a single pane glass window that has an area of 8 ft² and is 3/16" thick. The outside temperature is -10°C and the inside temperature is 21°C. [9] a. How much heat flows through the window in 8 hours? Use an R-value. b. In reality, all surfaces have a thin layer of air covering them that does not move. This air "film" is about 5x104 m thick. Calculate how much heat flows through the window in the 8 hour period with the addition of this film of air on both sides of the window. c. Most windows are double-pane glass with " Argon gas between the two panes. If the R- value of Argon gas is 0.54 W1 m2 °C for a thickness of 1 cm, find: i. The effective RSI-value of the window. ii. The effective R-value of the window. iii. The effective U-value of the window. R = 1.3 x 102 x 0.476 = 6.19×103 Thermal Resistances R for Materials of Thickness 1 cm Material Copper Plywood Glass R (W m² K) (or W 'm²°C) 2.6 X 10 8.6 X 10 1.3 × 10