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GK QUESTION#3101

Assertion (A): The stokes is a CGS unit of kinematic viscosity. Reason (R): The joule is an SI unit of energy equal to one newton metre.

  1. ABoth A and R are true, and R is the correct explanation of A.
  2. BBoth A and R are true, but R is not the correct explanation of A.Correct answer
  3. CA is true, but R is false.
  4. DA is false, but R is true.
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Answer

B. Both A and R are true, but R is not the correct explanation of A.

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Explanation

The stokes is a CGS unit of kinematic viscosity:1 St=1 cm²/s=10⁻⁴m²/s. A joule is one newton metre and measures energy. Both statements are true, but the energy-unit definition does not explain the viscosity unit.

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