A student is to determine the kinematic viscosity of an oil using the system shown in Prob. 14–101. The initial fluid height in the tank is H = 40 cm, the tube diameter is d 5 6 mm, the tube length is L = 0.65 m, and the tank diameter is D = 0.63 m. The student observes that it takes 1400 s for the fluid level in the tank to drop to 34 cm. Find the fluid viscosity.