Question

Water from a pipe is coming at a rate of 100 litres per minute. If the radius of the pipe is 5 cm, the radius of the pipe is 5 cm, the Reynolds number for the flow is of the order of (density of water = 1000 kg/m³, coefficient of viscosity of water = 1 Pa^-s:

(a) 10³

(b) 10⁶

(c) 10²

(d) 10⁴

Answer 1

Correct option is : (d) 10⁴

Reynolds number = \(\frac{\rho vd}{\eta}\)

Volume flow rate = v x πr²

Order = 10⁴