Assertion :Reynolds number cannot be negative. Reason: Reynold's formula is valid for all types of flow

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Reynold's number is given by,
$R_{l} = \frac{ϱ v l}{μ}$ ; here $ϱ, v, l$ and $μ$ are always positive which makes Reynold's number always positive irrespective of any other factor And it is a universal law hence it is valid for all types of flow.

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