Question

water flow through a horizontal pipe whose internal diameter is 2 at a speed of 1m/s. what should be the diameter of the nozzle if the water is to emerged at a speed of 4m/s​

Answer 1

Equation of continuity:-

A1v1=A2v2

($\pi$r1²)v1=($\pi$r2²)v2

r1²v1=r2²v2

D1²v1=D2²v2 [ r=D/2]

2²*1=D2²*4

D2=1