The inside surfaces of a pottery oven are all at 500oC. A cube of clay (10 cm on each side, ? = 0.9), initially at 20oC is placed inside. (a) Assuming that all of the energy transfer is by radiation, what is the rate of heat transferred to the clay? (b) When the clay is removed, it is at 500oC and it is left to cool on a rack in the 20oC room (h = 5 W/m2 . oC). What is the rate of convection heat transfer from the clay to the room? (c) What is the heat flux in part b)?