The surface of a 50 -mm-diameter, thin-walled tube is maintained at 100C. (i) In one case air is in cross flow over the tube with a temperature of 25C and a velocity of 50m/s. (it) In ano ther case air is in futly developed flow through the tube with a temperature of 25C and a mean velocity of 50m/s. Determine the heat flux from the tube to the air, in W/ m2, for the two cases. q1=qm=W/m2W/m2