Question

The radius of soap bubble is the surface tension of the soap is s keeping the temperature constant the radius of the soap bubble is doubled the energy necessary for this will be

Answer 1

Answer:

soap bubble has two free surfaces.

So, increase in surface area,

if radius get doubled is dA=2×[4π(2r)2−4πr2]=24πr2

The energy spent will beE=W=S×dA=S×24πr2A