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Originally Posted by flappist
The density of the ice is less than the water so it floats. The mass of the ice displaces the same mass of water to set the level.
When the ice melts it becomes water and is therefore the same density so displaces the same as before so the level does not change.
Archimedes in ancient Greece (250BC +/-) is credited for the discovery of this principle.
The big whinge about oceans rising is that most ice in the world is not floating it is on land.
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Beware the miniscus......
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