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Explain the following observations:
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Aug 26, 2021
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Physics Form 1
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anonymous
Explain the following observations:
Water wets glass surface but does not wet the waxed glass surface.
A steel needle placed carefully on the surface of water does not sink.
pressure
surface tension
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Aug 26, 2021
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anonymous
Water wets glass surface but does not wet the waxed glass surface.
water wets glass-adhesive force is stronger between water molecules and glass molecules.
A steel needle placed carefully on the surface of water does not sink.
surface of water acts/appears like an elastic stretched 2km due to forces of surface tension.
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