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    kesavan's Avatar
    kesavan Posts: 118, Reputation: 1
    Junior Member
    		  
    #1

    Sep 20, 2010, 09:51 AM
    Thermal equlibrium
    Is it possible for two objects to be in thermal equlibrium if they are not in contact with each other?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Sep 20, 2010, 10:08 AM

    According to this wikipedia article, they must be in contact.

    http://en.wikipedia.org/wiki/Thermod...al_equilibrium

    So, it implies that it is not possible to have two bodies in thermal equilibrium unless they are in contact.

    EDIT: Forgot the link, sorry :o
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #3

    Sep 20, 2010, 10:30 AM

    I disagree - two bodies can exchange heat without being in physical contact wiith each other, through radiation and/or convection.

    EDIT: to be clear, to be in thermal equilibrium two objects must be in thermal contact, meaning they can exchange energy via heat. But this does not mean that they must be in direct physical contact.
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