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GATE 2019 AE – Question 14

Aerodynamics · Basic fluid mechanics: kinematics, conservation laws, dimensional analysis, incompressibility and Newtonian fluids · 1 mark · Multiple choice

The dimensions of kinematic viscosity are

  1. $LT^{-1}$
  2. $L^2T^{-1}$
  3. $LT^{-2}$
  4. $L^{-2}T$

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Correct answer: (B) $L^2T^{-1}$

Explanation

Kinematic viscosity is dynamic viscosity divided by density. Their dimensions are $ML^{-1}T^{-1}$ and $ML^{-3}$, respectively. The ratio is $L^2T^{-1}$, B.

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