a pump is used to empty a 4400 l wading pool. the water exits the 2.0-cm-diameter hose at a speed of 1.8 m/s . part a how long will it take to empty the pool? express your answer in seconds. A 1.0 cm diameter pipe widens to 2.0 cm, then narrows to 0.50 cm. Liquid flows through the first segment at a speed of 4.0 m/sA pump is used to empty a 6000 L wading pool. The(a) What are the speed in the second and third segments? (Ans: 1.0 m/s, 16 m/s)(b) What is the volume flow rate through the pipe? (Ans: 3.14 x 10-4 m3/s)