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.
Hint : For flow to be just turbulent `R_(e)` = 2000

Explanation

To find the average velocity of water in a tube of radius 2.5 mm such that the flow is just turbulent, we can use the Reynolds number formula. The Reynolds number (Re) is given by the equation:

\[ Re = \frac{\rho V D}{\eta} \]

Where:
- \( \rho \) = density of the fluid (for water, approximately \( 1000 \, \text{kg/m}^3 \))
...