Why Does Hot Water Freeze Faster Than Cold Water?

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Homework Statement


For my physics homework I'm supposed to make "5 intelligent and observant questions about the Mpemba effect." but I don't even know why it happens! Can anyone help me out?


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The Attempt at a Solution

 

Discussion

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AFAIK no one knows exactly why the Mpemba effect occurs. I suggest you try to come up with explanations and ways to test them,
 

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