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Which temperature has water the highest density at?

0°C

-52°C

4°C

97°C

4 degrees C turns out to be the temperature at which liquid water has the highest density. If you heat it or cool it, it will expand. The expansion of water when you cool it to lower temperatures is unusual, since most liquids contract when they're cooled.

ShadowMaster

4

Wknight94 wikipedia → Maximum density

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