Answer to Question #263688 in Civil and Environmental Engineering for jjk

Question

A reservoir supplies water to a horizontal 6′′ pipe 800 ft long. The pipe flows full and discharges into the atmosphere at the rate of 2.23 cfs. What is the pressure in psi midway in the pipe, assuming the only lost head is 6.20 ft in each 100 ft of length?

Answer 1

By considering the pressure forces acting on a triangular fluid element of constant depth we can show that the pressure at a point in a fluid in equilibrium (no motion) is the same in all directions; it is a scalar quantity. For gases and liquids in relative motion the pressure may vary with direction at a point; however, this variation is extremely small and can be ignored in most gases and in liquids with low viscosity (e.g., water). We have not assumed in the above discussion that pressure does not vary from point to point, only that at a particular point it does not vary with direction.

So, the pressure will be same as it’s $800 psi$