QUESTION $3[10$ marks$]$

Water at $10C$ flows through a $25mm\%$ pipe with a mean velocity of $360\frac{m}{m}in.$

$3\mathrm{.}1$ Assuming that viscous effects dominate, determine the head lost due to friction per

kilometre of pipeline.

$3\mathrm{.}2$ If oil with a specific weight of $8\mathrm{.}829k\frac{N}{m^3}$ and a viscosity of $1\mathrm{.}0710-4\frac{m^2}{s}$ flows at

the same rate through the same pipe, compute the head lost due to friction per

kilometer of pipeline.