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 jf0 qbj4 n/.htideal fluid is marked as it moves along a horizontal str xpi/7gw 7ua z5eamline 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 i /izwpu ag 57x7n Region II is half of what 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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