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Hello if anyone could help it would be great. Why is cooler material more dense than warmer material?
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Hello if anyone could help it would be great. Why is cooler material more dense than warmer material?

User Neverland
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Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water.
User Mnrl
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