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NEET
Exam
NEET
Subject
Physics
Chapter
Mechanical Properties of Fluids

NEET · Physics · Mechanical Properties of Fluids

Surface tension is exhibited by liquids due to force of attraction...

Surface tension is exhibited by liquids due to force of attraction between molecules of the liquid. The surface tension decreases with an increase in temperature and vanishes at boiling point. Given that the latent heat of vaporisation for water (Lv) = 540 k cal kg–1, the mechanical equivalent of heat (J) = 4.2 J cal–1, density of water (ρw) = 103 kg l–1, Avogadro’s Number (NA) = 6.0 × 1026k mole–1, and the molecular weight of water (MA) = 18 kg for 1 k mole. Calculate F/d, which is a measure of the surface tension.

Options

  1. A6.6×10-2Nm
  2. B3.3×10-2Nm
  3. C3.3×10-3Nm
  4. D6.6×10-3Nm

Correct answer

A. 6.6×10-2Nm

Step-by-step solution

Correct Option is : (A)
6.6×10-2Nm
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