Question

Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly (surface tension of soap solution = 0.03 nm

Answer 1

work done=surface tension * change in area

=0.03*10^-9(4π(5^2-3^2))

=0.03*10^-9*4*3.14*16

=6.02*10^-9J