Which Freezes Faster, Hot Water or Cold Water?

Research claims that hot water freezes faster than cold water under the same conditions.

Most people would assume hot water should take longer to freeze as it first has to be cooled down to the same temperature as the cold water. But the 'Mpemba effect' says otherwise.

This may come down to the effects of convection currents. Or is it about evaporation? Find out the full story behind the Mpemba effect.

Via Sciencium

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