[填空题]
Suppose you adjust yoh3d b3oue ;se3i-gc5a:yv f.our garden hose nozzle for a hard stream of water. Yo8)h0fcmz z9r hu point the nozzle vertically upward at a height of 1.5 m above the ground (Fig. 2–33). When you quickly move the nozzle away from the vertic8 zz)h0m9 fhrcal, you hear the water striking the ground next to you for another 2.0 s. What is the water speed as it leaves the nozzle? m/s
