$($pipe length $=400m,$ Pipe ${?}_{DE}=180m$ diametr $=0\mathrm{.}5m,$ friction factor is $f=0\mathrm{.}03)$

Q$1.$ Given that the valve is closed: find the absolute and gage pressure of water at the

elevations shown,. $($Hint: elevation of the middle point of the valve is the average of the sides

elevation$).$

Absolute Pressure $(\frac{N}{m^2})$:

Gage Pressure $(\frac{N}{m^2})$ :

Q$2.$ Given that the valve is open and the straight pipe was moved $($up or down!!$)$: if the

velocity of the pipe is $1\mathrm{.}5\frac{m}{s},$ find the absolute and gage pressure of water at the new

elevations.