A room has a 4m x 4m x10cm concrete roof (K1 = 1.26w|m|0C). At some instant, the temperature outside is 460c and radius 320c.
1) Calculate amount of heat flowing per second into the room through the roof.
2) If bricks (K2 – 0.56w |m|0c) of thickness 7.5cm are laid down on roof, calculate the new rate of heat flow under the same temperature conditions?
