Water with Ice

You have a glass of water and an ice cube floating in it. When the ice cube melts, will the water level increase, decrease or remain the same?

It will remain the same. The amount of water that the ice cube displaces is equal to its mass. Since the mass does not change and the density of water is equal to 1, the extra water after melting will be the same amount as the displaced water before that.

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  1. volume displaces the water, not mass. a block of gold the same size as the ice cube, will displace the same amount of water. therefore when the ice melts, its volume will decrease, therefore the level of the water should decrease……. I think.