Consider a pig alone in a large barn exchanging thermal radiation with the inside walls of the barn. The surface area of the pig can be approximated as 2 m2 , with its skin temperature of 35°C and a skin emissivity of 0.90. The mean temperature of the inside walls of the barn is 10°C. (a) Calculate the net radiative heat exchange (loss) from the pig. (b) Calculate the thermal radiation emitted by the pig and explain the difference between it and what is calculated in part (a).