Glycerin is flowing through a $2\mathrm{.}5cm$ diameter horizontal pipe of $30m$

length i$,$hai discharges it into the atmosphere at $101$kPa. The flow rate

througl the pipe is $0\mathrm{.}05$ litres$/$second$.$ Dynamic viscosity $()$ and density

of glycerin are $0\mathrm{.}25k\frac{g}{m}-$s and $1250k\frac{g}{m^3},$ respectively.

Answer the following:

$($i$)$ What is the absolute pressure at $30m$ length just before the exit of

pipe?

$($ii$)$ At what angle $()$ must the pipe be inclined downward from the

horizontai for the pressure in the entire pipe to be atmospheric

pressire and tree flow rate to be maintained the same?