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Give reason for the following observatio...

Give reason for the following observation: The small of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.

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The smell of hot sizzling food or that of cold food reaches us by diffusion and at high temperature diffusion becomes faster. That is why the smell of hot sizzling fod reaches us several meters away but to get the smell from cold food, we have to go close.
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