The force required to take away flat pla...

The force required to take away flat plate of radius `4cm` from the surface of water is (surface tension os water `=70"dyne"//cm)`

`1221.2 "dyne"`

`1589.2"dyne"`

`1645.3"dyne"`

`1758.4"dyne"`

Text Solution

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The correct Answer is:

`F=2pirxxT`

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