In the United States, flow rates through showerheads are regulated to be no greater than 9.5 L/min under any water pressure condition likely to be encountered in a home. Water pressures in homes are...

In the United States, flow rates through showerheads are regulated to be no greater than 9.5 L/min under any water pressure condition likely to be encountered in a home. Water pressures in homes are typically less than 550 kPa. A practical showerhead delivers water at a velocity of at least 5 m/s. If nozzles in a showerhead can be manufactured with diameters of 0.75 mm, what is the maximum number of nozzles required to make a practical showerhead?