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. 18 $\pi$ ergs
• B. 180 $\pi$ ergs
• C. 1800 $\pi$ ergs
• D. 8000 $\pi$ ergs

Answer 1

Answer: (C)

1800 $\pi$ ergs

Answer 2

$= 4 \pi \times 1 \times 50 \left( 10 ^ { 3 / 3 } - 1 \right)$

=