The Darcy-Weisbach friction factor f which is a direct measure of resistance to flow in pipes depends on which of the following?

Relative roughness, velocity and viscosity

Relative roughness, diameter and viscosity

Roughness height, diameter and velocity

Roughness height, diameter, velocity and kinematic viscosity.

The Darcy-Weisbach friction factor f which is a direct measure of resi

1.	The Darcy-Weisbach friction factor f which is a direct measure of resistance to flow in pipes depends on which of the following?
A.	Relative roughness, velocity and viscosity
B.	Relative roughness, diameter and viscosity
C.	Roughness height, diameter and velocity
D.	Roughness height, diameter, velocity and kinematic viscosity.
Answer» E.