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 f w 4ywo2yu056t7nbeviluid is marked as it moves along a horizontal st cf5:-kw /vnuhreamline through a pipe, as shown in the figure. In Region I, the speed of the fluid on the streamline isvc-uwnf: /hk 5 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 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

微信扫一扫，分享更方便