Oil at 100F is owing through a 1.0in inner diameter copper tube that is 20ft long at the ow rate of 100 lbm/hr.

Oil at 100F is owing through a 1.0in innerdiameter copper tube that is 20ft long at the ow rate of 100 lbm/hr. The inside surface ofthe tube is maintained at 215F by condensing steam on the outside surface. Fully developedow may be assumed through the length of the tube, and the physical properties of the oilmay be considered constant at the following values: = 55 lbm/ft3, cp = 0.49 Btu/lbmF, = 1.42 lbm/hr ft, k = 0.0825 Btu/hr ftF.(a) Compute Pr.(b) Compute Re.(c) Calculate the exit temperature of the oil