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Derive Laplace’s law for spherical membrane of bubble due to surface tension.
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Derive the relation between surface tension and surface energy per unit area.
The surface tension of water at 0ºc is 75·5 dyne/em. Find surface tension of water at 25°C. [α for water = 0·0021/°C]
A raindrop of diameter 4 mm is about to fall on the ground. Calculate the pressure inside the raindrop. [Surface tension of water T = 0.072 N/m, atmospheric pressure = 1.013 x 105 N/m2 ]
Water rises to a height 3.2 cm in a glass capillary tube. Find the height to which the same water will rise in another glass capillary having half area of cross section.
Angle of contact for the pair of pure water with clean glass is _______.
- Angle Of Contact
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