SATHEE: Properties Of Solids And Liquids Question 349

Properties Of Solids And Liquids Question 349

Question: A liquid drop of diameter D breaks upto into 27 small drops of equal size. If the surface tension of the liquid is s, then change in surface energy is[DCE 2005]

Options:

A) $π D^{2} σ$

B) $2 π D^{2} σ$

C) $3 π D^{2} σ$

D) $4 π D^{2} σ$

Show Answer

Answer:

Correct Answer: B

Solution:

Work done = $4 π R^{2} T (n^{1 / 3} - 1)$

$= 4 π {(\frac{D}{2})}^{2} σ (n^{1 / 3} - 1)$

$= π D^{2} σ (27^{1 / 3} - 1)$

$= 2 π D^{2} σ$

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Properties Of Solids And Liquids Question 349

Question: A liquid drop of diameter D breaks upto into 27 small drops of equal size. If the surface tension of the liquid is s, then change in surface energy is[DCE 2005]

Options:

Answer:

Solution:

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