FIGURE 15-18 -Water Flows Through the 30.0-Cm Diameter Pipe Shown in Figure

Multiple Choice

FIGURE 15-18
-Water flows through the 30.0-cm diameter pipe shown in Figure 15-18. An open tube is flush with an opening in the pipe at A and enters the pipe at B and is bent along the centerline of the pipe to face the oncoming flow, as shown in the figure. Water enters the tube and rises until the hydrostatic pressure in the tube balances the pressure at the mouth of the tube. Because no more water enters the tube, the speed of the water just outside the mouth of the tube is zero m/s. What is the speed of the water in the pipe if the manometer reading is 8.50 cm? The manometer fluid is oil with a density of 800 kg/m³.

A) 0.125 m/s
B) 0.323 m/s
C) 0.424 m/s
D) 0.525 m/s
E) 0.577 m/s