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 $



NCERT Chapter Video Solution

Dual Pane