Properties Of Solids And Liquids Question 339
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 [MP PET 1990]
Options:
A) 18$ \pi $ ergs
B) 180$ \pi $ ergs
C) 1800$ \pi $ ergs
D) 8000$ \pi $ ergs
Show Answer
Answer:
Correct Answer: C
Solution:
$ W=4\pi R^{2}T({{n}^{1/3}}-1) $
$ =4\pi \times 1\times 50({{10}^{3/3}}-1) $ = $ 1800\pi \ erg $
