Question

water is piped from a dam to a town 24 km away using pipes each 8m long. How many pipes will be needed?

Answer 1

A = cross sectional area of the pipe. When the pressure is expressed in terms of the equivalent height of a column of that fluid, as is common with water, the friction loss is expressed as S, the "head loss" per length of pipe, a dimensionless quantity also known as the hydraulic slope.