Fluid Mechanics

A mercury drop of radius $10^{-3}$ m is broken into 125

equal size droplets. Surface tension of mercury is

0.45 $\mathrm{Nm}^{-1}$ . The gain in surface energy is:

$28 \times 10^{-5} \mathrm{~J}$

$2.26 \times 10^{-5} \mathrm{~J}$

$17.5 \times 10^{-5} \mathrm{~J}$

$5 \times 10^{-5} \mathrm{~J}$

Fluid Mechanics