Question

Calculate the work done in blowing a soap bubble of radius 5 cm

cm if the surface tension of soap solution is 30 dyne/cm​

Answer 1

Answer:

Work done in blowing a soap bubble W=2T(A 2 −A 1 )

now r 1 =0.05m ,r 2 =0.1m

So W=2T(4πr^2/2−4πr ^1/2 )=8πT(0.1 ²

−0.05 ² )=6.6×10^ −3 J