Question

The work done is blowing a soap bubble of $10cm$ radius is (surface tension of soap solution is $0.03N/m$

• A. $37.68\times {10}^{-4}J$
• B. $75.36\times {10}^{-4}J$
• C. $126.82\times {10}^{-4}J$
• D. $75.36\times {10}^{-3}J$

Answer 1

The correct option is B $75.36\times {10}^{-4}J$

The Work done is given as,

$W=2\times 4\pi r^2\times T$

$=2\times 4\pi {\left(10\times {10}^{-2}\right)}^2\times 0.03$

$=75.36\times {10}^{-4}J$

Thus, the work done is $75.36\times {10}^{-4}J$.