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If the surface tension of soap solution ...

If the surface tension of soap solution is `35"dynes"//cm`, calculate the work done to form an air bubble of diameter 14 mm with that solution.

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Surface tension `T="35 dynes cm"^(-1)=0.035 Nm^(-1)`
`"Radius of the bubble"`
`r=(14mm)/(2)=7mm=7xx10^(-3)m`
`W=DeltaAxxT=8pir^(2)T=8xx(22)/(7)xx49xx10^(-6)xx0.035`
`W=4.312xx10^(-5)J`
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