本题目来源于试卷: Fluid Mechanics，类别为 美国物理杯赛(Physics Bowl)
[单选题]
12.47: Water flows ideally through a cylindrically-shapedmcbq(3jy zlw+ trb2qdi-4 ,0f 9o/r7kmuyf9 p pipe. At the lower end, the pipe’s cross- sectional area ismp9rou yfk/97 $ 30.0 cm^{2}$ whereas in the upper portion, the pipe’s cross-sectional area is $10.0cm^{2}$ and fluid is moving at 9.0 m/s. Which one of the following choices best represents the difference in pressure between the lower section of the pipe and the upper section if the vertical distance between the centers of the pipe sections is 2.0 m ?
A. 5.6 Pa
B. 6.05 Pa
C. 56 kPa
D. 60.5 kPa
E. 65 kPa
参考答案: C
本题详细解析:
暂无
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