A small stagnant pendulum with diameter of 0.5 ft and surface temperature of 100 oF is hung from the roof in a room. The temperature of surrounding walls and stagnant air in the room is 80 oF. Given e1 = 0.93 at 100 oF and a1 = 0.93 at 80 oF. Calculate (a) amount of heat transfer by radiation (b) amount of heat transfer by convection (c) total amount of heat transfer from this pendulum