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प्रश्न
Define the surface energy of the liquid.
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उत्तर
The potential energy is greater for molecules at the surface film as compared to molecules well inside the liquid. This extra energy of the molecule on the surface layer of a liquid is called the surface energy of the liquid.
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संबंधित प्रश्न
Derive the relation between surface tension and surface energy per unit area.
Energy needed in breaking a drop of radius R into n drops each of radius r is given by ____________.
Assertion: If work done in increasing the size of a soap film from 10 cm x 4 cm to 10 cm x 8 cm is 2 x 10-4 J, then the surface tension is 5 x 10-4 N m-1.
Reason: Work done = Surface tension x increase in area.
If two identical mercury drops are combined to form a single drop, then its temperature will ____________.
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(surface tension of water = 7.2 x 10-2Nm-1)
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The surface tension of a liquid is 10 N/m. If a thin film of the area 0.05 m2 is formed on a loop. Then the surface energy will be:
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If T1, T2 and T3 are the forces due to surface tension at the liquid-s solid-gas and liquid-gas interfaces such that T2 - T1 ≅ T3 and the contact angle for the liquid-solid pair is θ then ______.
Prove that, equivalent S.I. unit of surface tension is J/m2.
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A liquid drop having surface energy E is spread into 729 droplets of same size. The final surface aenergy of the droplets is ______.
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Work done to get ‘n’ spherical drops of equal size from a single spherical drop of water, is proportional to ______.
