問題詳情
49. Water is flowing at 4.0 m/s in a circular pipe. If the diameter of the pipe decreases to 1/2 its former value, what is the velocityof the water downstream?
(A) 16 m/s
(B) 4.0 m/s
(C) 1.0 m/s
(D) 8.0 m/s
(E) 2.0 m/s
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)