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Lycopodium is lightly sprinkled on a clean water surface in a large tray. A red hot needle is plunged into the centre of the water surface. State and explain the observation made.
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Jul 29, 2021
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Physics Form 1
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anonymous
Lycopodium is lightly sprinkled on a clean water surface in a large tray. A red hot needle is plunged into the centre of the water surface. State and explain the observation made.
force
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Jul 29, 2021
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anonymous
A clear circle is formed
Surface tension is broken at the centre hence no force in the middle
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