1. A pipe passes through a room in which the surrounding air is at 20 C. The outside diameter of the pipe is 150 mm and the length of the pipe is 3 meters, and its surface temperature is 450C and the emissivity of the surface can be considered like a black surface. a. What is the surface emissive power (radiation heat loss)? [2 mark] b. If convection heat transfer coefficient from the surface to the air is 45 W/m2.K, what is the rate of heat loss form the surface of pipe by convection? [2 mark] c. Total heat loss from the surface of the pipe per unit length [1 mark]