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What keeps the water from spilling over the top of the cup?

User SuperVeetz
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2 Answers

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Surface tension is the reason. Surface tension holds the water together and acts against what would normally cause the water to fall – gravity – because each molecule of water is attracted to the other water molecules around it.
User Daanish
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11 votes
what keeps the water from spilling over the top is the surface tension.
User Yomimono
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