HW-Ch14 - HW-CH14 9th Edition CH14 Problems 27 53 65 71 82...

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HW-CH14 9th Edition CH14 Problems: 27, 53, 65, 71, 82 9th Edition CH14 Problems: 27, 53, 65, 67, 80 27. What would be the height of the atmosphere if the air density (a) were uniform and (b) decrease linearly to zero with height? Assume that at sea level the air pressure is 1.0 atm and the air density is 1.3 kg/m 3 . 53. Water is pumped steadily out of a °ooded base- ment at a speed of 5.0 m/s through a uniform hose of radius 1.0 cm. The hose passes out through a window 3.0m above the waterline. What is the power of the pump? 65. Figure 14-53 shows a stream of water °owing through a hole at depth h= 10 cm in a tank holding water to height H = 40 cm. (a) At what distance x does the stream strike the °oor? (b) At what depth should a second hole be made to give the same value of x ? (c) At what depth should a hole be made to maximize x ? 71. A venturi meter is used to measure the °ow speed of a °uid in a pipe. The meter is connected between two sections of pipe (Fig. 14-55); the cross-sectional area A of the entrance and exit
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