Determine the (a) shear stress at the walls of a 400-mm- diameter pipe when water flowing causes a head lost of 3 m in 100 m pipe length, (b) the shear velocity, and the (c) shear stress at 60 mm from the centerline of the pipe.

Determine the (a) shear stress at the walls of a 400-mm- diameter pipe when water flowing causes a head lost of 3 m in 100 m pipe length, (b) the shear velocity, and the (c) shear stress at 60 mm from the centerline of the pipe.