31..16. An incompressible fluid flows through a 10 in. diameter horizontal constant-area pipe. At one section the pressure is 150 psia and 1000 ft downstream the pressure has dropped to 100 psia. (a)...

Extracted text: 31..16. An incompressible fluid flows through a 10 in. diameter horizontal constant-area pipe. At one section the pressure is 150 psia and 1000 ft downstream the pressure has dropped to 100 psia. (a) Find the total frictional force exerted on the fluid by the pipe. (b) Compute the average wall shear stress.