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  • The work done in blowing a soap bubble of voume 'V' is W. The workdone in blowing a soap bubble of volume '2V' is-Option: 1 <img

The work done in blowing a soap bubble of voume 'V' is W. The workdone in blowing a soap bubble of volume '2V' is-

Option: 1

\omega


Option: 2

2\omega


Option: 3

2^\frac{2}{3}\omega


Option: 4

3^\frac{2}{3}v


Answers (1)

best_answer

\omega_1=8 \pi r_1^2 T,\ \ \omega_2=8 \pi r_2^2 T \\

\frac{\omega_1}{\omega_2}=\frac{8 \pi r_1^2 T}{8 \pi r_2^2 T}=\frac{r_1^2}{r_2^2}

As, \quad v=\frac{4}{3} \pi r^3 \Rightarrow\ \ \therefore\left(\frac{r_1}{r_2}\right)^2=\left(\frac{v}{2 v}\right)^{2 / 3}

Posted by

Gunjita

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