Question

A spherical drop of oil of radius 1 cm is broken into 1000 droplets of equal radii. If the surface tension of oil is 50 dynes/cm, the work done is

• A. 18Πergs
• B. 180Πergs
• C. 1800Πergs
• D. 8000Πergs

Answer 1

The correct option is C

1800Πergs

$W=4\pi R^{2}T(n^{1/3}-1)=4\pi \times 1\times 50({10}^{3/3}-1)$

$=1800\pi erg$