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A matchstick rubbed at one end with soap starts moving immediately in one direction when placed on the surface of water.
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Aug 26, 2021
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Physics Form 1
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anonymous
A matchstick rubbed at one end with soap starts moving immediately in one direction when placed on the surface of water.
pressure
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Aug 26, 2021
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anonymous
soap at the end of the stick immediately dissolves in water hence lowering surface tension at the end of the stick. Surface tension at the other end pulls the stick and makes it move in that direction.
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