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Physics-

General

Easy

Question

A space 2.5 cm wide between two large plane surfaces is filled with oil. Force required to drag a very thin plate of area 0.5 $m to the power of 2 end exponent$ just midway the surfaces at a speed of 0.5 m/sec is 1N. The coefficient of viscosity in kg–sec/ $m to the power of 2 end exponent$ is :

$5 \times 10^{- 2}$
$2.5 \times 10^{- 2}$
$1 \times 10^{- 2}$
$7.5 \times 10^{- 2}$

The correct answer is: $2.5 cross times 10 to the power of negative 2 end exponent$

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