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Why does ice floats in water and why does ice sink in rubbing alcohol?

April 26, 2017alcohol floats Ice rubbing sink water

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Why does ice floats in water and why does ice sink in rubbing alcohol?

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The density of rubbing alcohol is 75% that of water. Thus ice (frozen water which is roughly equal in density to liquid water), sinks in rubbing alcohol since it has more mass per cubic millimeter than the alcohol does. In order to float, the object would have to be less dense than the alcohol per cubic space.