Water flows at speed v in a pipe of radius r.Neglecting viscosity,at what speed does the water flow through a constriction in which the radius of the pipe is r/3?
A)v/9
B)v/3
C)v
D)3v
E)9v

Question

Quizplus · Accepted Answer

The speed of a fluid flowing through a pipe is inversely proportional to the square of the radius of the pipe. Therefore, the speed of the water flowing through the constriction will be 9 times the speed of the water flowing through the original pipe.

Water Flows at Speed V in a Pipe of Radius