Properties Of Solids And Liquids Question 330
Question: A drop of liquid of diameter 2.8 mm breaks up into 125 identical drops. The change in energy is nearly (S.T. of liquid =75 dynes/cm) [CPMT 1989]
Options:
A) Zero
B)19 erg
C) 46 erg
D)74 erg
Show Answer
Answer:
Correct Answer: D
Solution:
$ E=4\pi R^{2}T({{n}^{1/3}}-1) $ = $ 4\times 3.14\times {{(1.4\times {{10}^{-1}})}^{2}}\times 75({{125}^{1/3}}-1) $
$ =74\ erg $
