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Which of the following is a unit of dynamic viscosity?

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+2 votes
in Fluid Mechanics by (118k points)
Which of the following is a unit of dynamic viscosity?

(a) [M^1 L^1 T^-1].

(b) [M^1 L^-1 T^-1].

(c) [M^1 L^-2 T^-2].

(d) [M^1 L^-2 T^-2].

I got this question during an online interview.

This intriguing question comes from Viscosity in section Properties of Fluids of Fluid Mechanics

1 Answer

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Right option is (b) [M^1 L^-1 T^-1].

The best I can explain: where F= viscous force, A= area, du ⁄ dx = velocity gradient, μ = co-effcient of viscosity. Therefore,

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