A large furnace whose walls are at Tsur=1000K and whose air is at T=400K is being used to heat a cylinder. The air is circulating in the furnace at a velocity V=3m/s. The cylinder has a diameter D=30mm and has a length L=150mm. Compute the cylinder surface temperature under steadystate conditions for the following three scenarios: (a) The air is moving perpendicular to the cylinder and the cylinder surface is diffuse and gray with an emissivity of 0.5. (b) The air is moving perpendicular to the cylinder and the cylinder surface is spectrally selective with a spectral absorptivity =0.1 for less than or equal to 3m and =0.5 for greater than 3m (see the second figure below for the spectral distribution). (c) The air is moving along the cylinder and the cylinder surface is diffuse and gray