A convergent-divergent nozzle is fitted into the vertical side of a tank container water. Assuming that there are no losses in the convergent part of nozzle, that the losses in the divergent part are equivalent to 0.18 times the velocity head at exit, and that the minimum absolute pressure at the throat is 2.5 m of water. For a barometric pressure of 10.4 m of water, determine the throat and exit diameters of the nozzle to discharge 0.0045 m³/s for a head of 1.5 above the centreline of the nozzle. As the head in the tank is allowed to fall, show that the pressure at the throat is a linear function of the head above the nozzle. Po P2