A frame made of metallic wire enclosing a surface area A is covered with a soap film. If the area of the frame of metallic wire is reduced by 50 % , the energy of the soap film will be changed by

Step-by-step solution

Surface energy = surface tension surface area E=T 2 A New surface energy, E₁=T 2 ( A 2 )=T A % decrease in surface energy aligned & = E-E₁ E 100 & = 2 T A-T A 2 T A 100=50 % aligned