Pick out the correct statement?

A. Mach number is given by the ratio of the speed of the fluid to that of sound in the fluid under

B. ditions of flow</strong>

C. Fanning friction factor is inversely proportional to Reynolds number always

D. ume to the volume of voids in the bed

E. Mach number in an incompressible fluid is always unity

F. The property of a randomly packed bed (with raschig rings) is given by the ratio of the total

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