Water at 24 degree C flows at 0.8 m/s in a smooth, 1.5 cm I.D. tube that is kept at 27 degree C. The system is extremely clean and quiet, and the flow stays laminar until a noisy air compressor is turned on in the laboratory. Then it suddenly goes turbulent. Calculate the ratio of the turbulent h to the laminar h. [hturb = 4429 W/m2K.]