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IF work done by an agent to form a bubbl...

IF work done by an agent to form a bubble or radius R is Q, then how much energy is required to increase its radius to 2R?

Text Solution

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Energy required to form soap bubble of radius R=W
`therefore w=8 pi R^2`
Work done to blow to bubble of Radius `2R=8pi(2R)^2=4w`
`therefore` Work done to increase the radius from R to 2R =4w-w=3w
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