Fluid Mechanics (id: 7a6cdbce3)

本题目来源于试卷: Fluid Mechanics，类别为 美国物理杯赛(Physics Bowl)

[单选题]
09.35: A piece of an ideal fluid is markegf5d8t*ay 0c6m3 kbxod as it moves along a horizontamnrqr uuw* ,w:/e 42nxl streamline through a pipe, as shown in the figure. In Region I, the speed of the fluid on the streamline is V. The cylindrical, horizontal pipe narrows so that the radius of the pipe in Region II is half of what it was in Region I. What is the spx 4n eww,2ru umn:/r*qeed of the marked fluid when it is in Region II?

A. $4V$
B. $2V$
C. $V$
D. $V/2$
E. $V/4$


参考答案:  A


本题详细解析: 暂无

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