Air flows through the device shown in the figure. If flow rate is large enough, the pressure within the

constriction will be low enough to draw water up inte the tube.

Derive an equation to determine the flow $(Q)$ needed to rise the water the distance $h.[30$ points$]$

If $D=50mm,d=25mm,$ and $h=0\mathrm{.}3m,$ determine $Q.[5$ points$]$

Specific weight of air:

${}_a=12\frac{(N)}{m^3}$