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 flows through a long horizo dbuji p4ma..k- 23jvontal circular pipe. In ts/2a)imw *gj one region of the pipe, it has g) j/miw*a2stradius 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 speed 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
| 
