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At 20^@C , The radius of mercury drop is...

At `20^@C` , The radius of mercury drop is 3mm and its surface tension is `4.65xx10^-1 N//m`. What is the excess of pressure inside the drop?

A

`310 N//m^2`

B

`210 N//m^2`

C

`110 N//m^2`

D

`10 N//m^2`

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