Question

What is the work done in blowing a soap bubble of radius r and surface tension S

Answer 1

$heya \:$✌

$we \: know \: that$,

WORK DONE = SURFACE TENSION × AREA OF OBJECT

$work \: done \: = s \times (4\pi \: r {}^{2} ) \times 2$

$8\pi \: s \: r {}^{2}$