TS EAMCET · Physics · Mechanical Properties of Fluids
When ' \(n\) ' identical mercury drops combine to form a single big drop
- A Surface area increases and heat is released
- B Surface area decreases and heat is released
- C Surface area increases and heat is absorbed
- D Surface area decreases and heat is absorbed
Answer & Solution
Correct Answer
(B) Surface area decreases and heat is released
Step-by-step Solution
Detailed explanation
\(R = n^{1/3}r\) \(A_{initial} = n \cdot 4\pi r^2\) \(A_{final} = 4\pi R^2 = 4\pi (n^{1/3}r)^2 = 4\pi n^{2/3}r^2\) Since \(n > 1\), \(n^{2/3} Decrease in surface energy leads to heat release. Surface area decreases and heat is released.
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