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 marked as it moves along bpdfxt 6kh:r(0 aru0x.;+tjf a horizo 6j, cx lu 987hzeenqy-ntal 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 wh 9ej-ly n8qc xz u7e6,hat it was in Region I. What is the speed 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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