A backyard waterfall used in landscaping (Fig. P10.94) has water cascading down at a rat...

A backyard waterfall used in landscaping (Fig. P10.94) has water cascading down at a rate of 18 liters/min. (a) If the waterfall is fed using a hose of diameter 2.5 cm, what is the speed of water in the hose? (b) If the hose is 15 m long, what is the pressure difference between the two ends of the hose?