Air at atmospheric pressure and 27°C enters a 12 m long, 1.5 m ID tube with a mass flow rate of 0.1 kg/s. The tube surface is maintained at a uniform temperature of 80°C. Calculate the average heat...

Air at atmospheric pressure and 27°C enters a 12 m long, 1.5 m ID tube with a mass flow rate of 0.1 kg/s. The tube surface is maintained at a uniform temperature of 80°C. Calculate the average heat transfer coefficient and the rate of heat transfer to air.