A soap bubble with a diameter of 2.28" is to be enlarged by blowing air into it. If the surface tension of the soap solution is 0.0040 lbf/ft, determine the work input required to inflate the bubble to a diameter of 4.94". Express your answer in 8 decimal places and in Btu.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A soap bubble with a diameter of 2.28" is to be enlarged by blowing air into it. If the surface tension of the soap solution is 0.0040 lbf/ft, determine the work input required to inflate the bubble to a diameter of 4.94". Express your answer in 8 decimal places and in Btu. 

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