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The surface tension of a soap solution i...

The surface tension of a soap solution is `0.03Nm^(-1)` . How much work is done in producing soap bubble of radius `0.05m` ?

Text Solution

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Given: Surface Tension , `T=0.03N//m`
Work, `W=?`
radius of Soap bubble, `r=0.05m`
Formula: (F) Force `xx` radius (r )
`=4` (Surface Tension `Txx` Area`A`)
`Fxxr=4TA`
`(W)` work=`4T(pir^(2))`
`W=4T(pir^(2))`
`W=4xx0.03xx3.14xx0.05xx0.05`
`=0.000942J`
`W=9.42xx10^(-4)J`
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