A liquid drop having surface energy E is spread into 512 droplets of the same size. The final surface energy of the droplets is

Step-by-step solution

The surface area of the liquid drop is A = 4 π R 2 Its surface energy is E When the drop splits in 512 droplets, the surface area of each droplet is 4 π r 2 ∴ Total surface area A 2 = 512 × 4 π r 2 The volume of the bigger drop is 4 3 π R 3 and the volume of small droplets is 512 × 4 3 π r 3 ∴    4 3 π R 3 = 512 × 4 3 π r 3 ⇒ r = R 8 ∴    A 2 = 512 × 4 π r 2 = 512 × 4 π R 8 2 = 8 A 1 Surface energy E =