ï»¿ A soap bubble of radius 10mm is blown from soap solution of surface tension 0.06 N/m. Find the work done in blowing the bubble. What addition work will be done in further blowing to double the radius? from Physics Mechanical Properties of Fluids Class 11 Manipur Board

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A soap bubble of radius 10mm is blown from soap solution of surface tension 0.06 N/m. Find the work done in blowing the bubble. What addition work will be done in further blowing to double the radius?

The soap bubble is formed from the soap solution.

Therefore, increase in the surface area of soap bubble is equal to total surface area of soap bubble.

Since the soap bubble has two free surfaces, therefore increase in area of free surface of bubble is,

We have,

Radius of the soap bubble, r = 1mm=10-3Â

Â

Now the work done in blowing the bubble

Â

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