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Reynold's Number

Calculate Rey...

Question

Calculate Reynolds number, if a fluid having viscosity of $0.5 {Ns/m}^{2}$ and density of $450 {kg/m}^{3}$ , flows through a pipe of $20 mm$ diameter with an average velocity of $2.5 m/s$ .

A

225

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B

90

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C

45

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D

144

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Solution

The correct option is C $45$
We know,
Reynolds number $= \frac{ρ v D}{μ} = \frac{450 \times 2.5 \times .02}{0.5} = 45$

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Reynold's Number

Standard XII Physics

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