Question

what should be the average velocity of water in a tube of radius 2.5 mm so that the flow is just turbulent?viscosity of water is 0.001 pa s.

Answer 1

For flow to be just turbulent R =2000

So using R=rho v D /n

2000=1000 *v *2.5*2/0.001

v=0.4m/s

Answer 2

Answer:

The answer is v=0.4m/s