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Author Topic: Why does a wet cloth feel colder than a dry one?  (Read 2991 times)

Alexander

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Why does a wet cloth feel colder than a dry one?
« on: 16/09/2008 21:18:54 »
Alexander asked the Naked Scientists:

Hi,
My question is why if you touch a wet piece of cloth left in a room it appears to be colder as compared with a dry one, even if they were left there for some time?

Thank you.
Alexander Tkachev,
Lawyer from Moscow

What do you think?


 

Offline RD

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Why does a wet cloth feel colder than a dry one?
« Reply #1 on: 16/09/2008 21:28:45 »
Water (and cloth) is more effective in conducting the heat from your hand than cloth (and air).

The thermal conductivity of metals is even higher than that of water,
e.g. try comparing the feel of a metal piece of furniture with a wooden part,
they are at the same (room) temperature, but the metal feels much colder. 


http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html
« Last Edit: 16/09/2008 21:33:03 by RD »
 

Offline syhprum

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Why does a wet cloth feel colder than a dry one?
« Reply #2 on: 16/09/2008 21:52:40 »
Also the wet clothe could well be colder than the ambient air if a flow of air is inducing evaporation of the liquid.
 

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Why does a wet cloth feel colder than a dry one?
« Reply #2 on: 16/09/2008 21:52:40 »

 

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