Discuss the below problem in detail:
Q: Air at 3 x 10-4 kg/s and 27°C enters a rectangular duct that is I m long and 4 mm by 16 mm on a side. A uniform heat flux of 600 W/m2 is imposed on the duct surface. What is the temperature of the air and of the duct surface at the outlet? You must solve the problem step by step.