Consider a manual automotive transmission case that is made of aluminum. The sides measure 0.3m and the system receives 140 HP in electrical energy from an external source. The ambient temperature, convection coefficient, and efficiency are 30^oC, 200 W/m2, and 0.90 respectively. Calculate the surface temperature of the transmission if:

a. Radiative heat transfer is neglected

b. Radiative heat transfer is not neglected and the system has an emissivity of 0.75

c. Compare and comment on the results