The parameters which determines the friction factor for turbulent flow

1.	The parameters which determines the friction factor for turbulent flow in a rough pipe are
A.	Froude number and relative roughness
B.	Froude number and Mach number
C.	Reynolds number and relative roughness
D.	Mach number and relative roughness
Answer» D. Mach number and relative roughness

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The parameters which determines the friction factor for turbulent flow in a rough pipe are

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