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A needle of 12 cm length is on the surfa...

A needle of 12 cm length is on the surface of water. The extra force required, over its weight, to take it out form the surface of water is (surface tension = 72 dyne `cm^(-1)`)

A

72 N

B

`0.864 N`

C

`0.0173 N`

D

`7.2 N`

Text Solution

Verified by Experts

The correct Answer is:
C
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