Explaining the Mpemba Effect: Causes and Discussion

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The Mpemba effect refers to the phenomenon where hot water freezes faster than cold water under certain conditions. Various explanations have been proposed, including differences in evaporation rates, convection currents, and the behavior of hydrogen bonds in water. Despite extensive research, the exact causes remain unclear, leading to conflicting theories and ongoing debate among physicists. Many experts agree that more investigation is needed to fully understand the underlying mechanisms. The discussion highlights the complexity of the Mpemba effect and the challenges in reaching a consensus on its causes.
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I have read many different explanations for the Mpemba effect. What is your take on it? What causes this effect? Let's discuss.
 
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What is Mpemba effect?
 
Under fairly reasonable conditions, hot water will freeze faster than cold water.
 
I should have been more specific. Since everything I've read seems either conflicting or states "we just don't know" , I want to know what some people knowledgeable in physics think is the underlying cause(s) of this effect.
 
I think it's easist first to watch a short vidio clip I find these videos very relaxing to watch .. I got to thinking is this being done in the most efficient way? The sand has to be suspended in the water to move it to the outlet ... The faster the water , the more turbulance and the sand stays suspended, so it seems to me the rule of thumb is the hose be aimed towards the outlet at all times .. Many times the workers hit the sand directly which will greatly reduce the water...
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