b. A resistance diagram is shown in Figure 1.1 below, which represents the heat transfer through a composite plane wall. Please use it to construct the heat transfer situation. Assume steady-state operation and no heat generation. Draw the wall and label all the heat flows and heat transfer mechanisms. Ti > To Ti On L/2A1 1/hA L/A L2/23A1 L3/k5A L2/24 A Figure 1.1 for Question 1 (b). CHEN10092 1/h,A 1/hrad A O To [8 marks] C. A sphere 10 cm in diameter is suspended inside a large, evacuated chamber whose walls are kept at 27 C. If the surface of the sphere has emissivity of 0.8 and is maintained at 227 C, determine the rate of heat loss from the sphere to the walls of the chamber. [3 marks]

b. A resistance diagram is shown in Figure 1.1 below, which represents the heat transfer through a composite plane wall. Please use it to construct the heat transfer situation. Assume steady-state operation and no heat generation. Draw the wall and label all the heat flows and heat transfer mechanisms. [8 marks] c. A sphere 10cm in diameter is suspended inside a large, evacuated chamber whose walls are kept at 27C. If the surface of the sphere has emissivity of 0.8 and is maintained at 227C, determine the rate of heat loss from the sphere to the walls of the chamber