A pressure difference across an elbow in a water pipe is measured. Estimate the flow rate in the pipe. The pressure difference, pipe diameter, and radius of curvature are, respectively:
(a) 80 kPa, 10 cm, 20 cm
(b) 80 kPa, 5 cm, 20 cm
(c) 10 psi, 4 in., 8 in
(d) 10 psi, 2 in., 8 in
Use a water temperature of 20°C.