At the best efficiency point, a centrifugal pump, with impeller diameter D=8 in., produces H =21 9 ft at Q=300 gpm with N =1170 rpm. Compute the corresponding specific speeds using:

(a) U.S. customary units,

(b) SI units rad s,m3 s,m2 s2 , and

(c) European units rev s,m3 s,m2 s2 . Develop conversion factors to relate the specific speeds.