本题目来源于试卷: Fluid Mechanics，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.36: An ideal fluid fqjwd xg;(lb o0dk3.+ jlows through a long horizontal circyepm 8t :wtig 0j.vgvw::bg(:ular pipe. In one region of the pipe, it has radius R. The pipe then widens to radius 2R. What is the ratio of the fluid's speed in the region of radius R to the s8:bg.j::wi eg v:pt( mtwgy0vpeed of the fluid in region with radius 2R?
A. 1/4
B. 1/2
C. 1
D. 2
E. 4
参考答案: E
本题详细解析:
暂无
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