Why copper vessel cooler on wooden table while in winer?
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Because our perception of hotness and coldness of an object depends on heat flow rate rather than the actual temperature of the body.
Copper being a metal has higher thermal diffusivity and can pass heat very quickly as compared to wood. When we touch a copper vessel, heat is taken away from our body at a very fast rate and we percieve that copper is colder than wood.
If we were to measure the temperature (using thermometer) of copper and wood which have been kept in open cold atmosphere for a sufficiently long period of time, we will get same reading for both.
Copper being a metal has higher thermal diffusivity and can pass heat very quickly as compared to wood. When we touch a copper vessel, heat is taken away from our body at a very fast rate and we percieve that copper is colder than wood.
If we were to measure the temperature (using thermometer) of copper and wood which have been kept in open cold atmosphere for a sufficiently long period of time, we will get same reading for both.
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