Question $6.$

$6\mathrm{.}1$ Water flows through a pipe with a diameter of $25$ mm and a length of $50$ mm at a velocity

of $2,5\frac{m}{s}.$

Use Darcy's formula to determine the loss of head due to friction. Assume that the coefficient

of friction has a value of $0,005.$ Test the answer by using the Chezy formula.

$6\mathrm{.}2$ A horizontal pipeline with a diameter of $75$ mm conveys water at a rate of $0,015\frac{m}{s}$ with a

pressure drop of $50$ kPa for every $30$ metres of pipe length.

Calculate the value of the coefficient of friction $($f$)$ for the above$-$mentioned circumstances

by using Darcy's formulaif