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An open U-tube of vertical limbs contain...

An open U-tube of vertical limbs contains oil of specific gravity 0.8 and surface tension 28 dyne`cm^(-1)`. The radii of limbs are 1mm and 4 mm. If the angle of contact is assumed `0^(@)`, calculate the difference of levels of oils in the limbs.

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The correct Answer is:
0.5357 cm
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