A pump at point A in a water delivery system produces 200 ft of head at a flow of 1000 gpm. It delivers water to a point B from a reservoir. If the head loss between point A and B is 20 feet, what is the pressure at point B in psi and kPa if B is at the same elevation as the water surface of the reservoir from which the pump is withdrawing water? (Ans: pB = 78.0 psi or 537.93 kPa)

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?