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 62p o. mz.snmk*sx fx uj8g7g)ideal fl 8*ocorf 4ix+ auid is marked as it moves along a horizontal 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 speed of the marked fluid when it is 4o +forixa*8cin 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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