A.Remains constant
B.Varies with Reynold’s number
C.Depends on relative roughness
D.Depends on Reynolds number, pressure gradient and relative roughness
E.Depends on velocity and relative roughness
A.Remains constant
B.Varies with Reynold’s number
C.Depends on relative roughness
D.Depends on Reynolds number, pressure gradient and relative roughness
E.Depends on velocity and relative roughness