Air at 1.0 atmosphere pressure and 77 0C enters a 5.0 mm i.d. tube with a bulk average velocity of 2.5 m/s. the velocity profile is developed and the thermal profile is developing. The tube length is 1.0 m, and a constant heat flux is imposed by the tube surface on the air over the entire length. An exit air bulk average temperature, T b,o = 127 0C, is required. Determine the exit h, the uniform heat flux and the exit tube surface temperature.