alleryThe free surface of a liquid possesses some additional:
APressure
BEnergy
CVolume
DDensity
Answer & Solution
Correct answer: B. Energy
1. Molecules at the surface are placed differently from those inside.
2. That difference shows up as extra energy at the surface.
3. This additional energy is what gives rise to surface tension.
_Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._
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