What pressure drop per foot of tube is caused by the shear stress in Problem 7.17? Problem 7.17 For water flowing in a 0.1-in.-diameter tube, the velocity distribution is parabolic (see Example 4.2)....

What pressure drop per foot of tube is caused by the shear stress in Problem 7.17?

Problem 7.17

For water flowing in a 0.1-in.-diameter tube, the velocity distribution is parabolic (see Example 4.2). If the average velocity is 2 fps, determine the magnitude of the shear stress at the tube wall.