49. Water is flowing at 4.0 m/s in a circular pipe. If the diameter of the pipe decreases to 1/2 its
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