Imagine That You Have Been Given the Job of Designing

Multiple Choice

Imagine that you have been given the job of designing a fountain to be the centrepiece of a new shopping mall on the Gold Coast. The fountain will consist of a single upward jet of water, launched from a pipe of radius 4 mm and length 1.5 m. The pipe is fed by recycled water, pushed by a pump which produces a pressure difference of 100 000 Pa. With what speed will the water come out of the pipe? The viscosity of water is 0.001 Pa s.

A) 1.3 m s-1.
B) 4.2 m s-1.
C) 13.3 m s-1.
D) 419 m s-1.
E) 133 m s-1.ANS