EXERCISE $2$

In the pipe system shown below the flow rate is $Q=0\mathrm{.}056\frac{m^3}{s}$ the pressure measured by the manometer $M_1$ is $p_1=400$kPa; the pipe has a constant diameter $D=0\mathrm{.}08m.$ Calculate the pressure measured by the manometers $M_2$ and $M_3$ assuming the fluid $($water$,=9810N)$ as perfect.