A 40 mm diameter 2 m long straight uniform pipe carries a steady flow of water (viscosity 1.02 centipoise) at the rate of 3.0 L/min. What is the approximate value of the shear stress on the internal wall of the pipe?

A

0.0166 dyne/cm$$^2$$

B

0.0812 dyne/cm$$^2$$

C

8.12 dyne/cm$$^2$$

D

0.9932 dyne/cm$$^2$$