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The dimensions of viscosity in mass, length and time are

  • A.mass per length squared per time
  • B.mass length per time squared
  • C.mass per time squared
  • D.mass per length per time

Answer: D

Viscosity is a stress divided by a velocity gradient, and reducing that combination gives mass per length per time, the poise or pascal second. Kinematic viscosity divides this by density and is length squared per time instead.

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