Examples:

Referring to the given figure below, assume that the liquid flows

from $A$ to $C$ at the rate of $222\frac{L}{s}$ and that the friction loss

between A and $B$ is negligible but that the head between $B$ and $C$

is $0,1\frac{V_B^2}{2}g.$ Find the pressure heads at A and $C.$

Natural gas $($methane$)$ flow from a $7\mathrm{.}6cm$ diameter gas main,

through a $2\mathrm{.}5cm$ diameter pipe and in to a burner of a furnace at

a rate of $2\mathrm{.}8\frac{m^3}{h}.$ determine the pressure in the gas main if the

pressure in the $2\mathrm{.}5cm$ pipe is to be $15\mathrm{.}2cm$ of water $($the density

of methane is $0\mathrm{.}667k\frac{g}{m^3})$