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The critical angular velocity w of a cyl...

The critical angular velocity w of a cylinder inside another cylinder containing a liquid at which its turbulence occurs depends on viscosity `eta`, density d and the distance x between the walls of the cylinders. Then w is proportional to

A

`(eta )/( x^(2) d)`

B

`(eta)/( d^(2) x)`

C

`( eta^(2) )/( xd)`

D

`( xd)/( eta)`

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The correct Answer is:
A
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