A slide-plate viscometer is used to measure the viscosity of a Newtonian fluid. A force of 250 N is required to keep the top plate moving at constant velocity of 20 cm/s. What is the viscosity of the fluid? ( B ) The analysis of a propeller that operates in water at 25°C shows that the pressure at tips of the propeller drops to 3.25 kPa at high speeds. Determine if there is a denger of cavitation for this propeller and why?