Question

# A liquid of coefficient of viscosity $$\eta =1$$ poise is flowing in a pipe of radius $$3cm$$ such that the rate of volume flow is $$1000\ell/min$$. Determine the Reynolds numbers.

A
3563
B
3500
C
3400
D
3600

Solution

## The correct option is B $$3563$$Rate of volume flow $$=\pi r^2=100 l/min$$$$\pi r^2=\dfrac{1}{60}m^3/s$$Reynolds number $$=R_e=\dfrac{\rho vD}{\nu}=\dfrac{1000}{0.1}\times \dfrac{1}{60\pi r^2}\times 2r$$$$\dfrac{2000}{1.0\times 60\pi \times 3\times 10^{-2}}=3563$$Physics

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