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Heat transfer of a cup of coffee

  1. Aug 16, 2012 #1
    does a cup of coffee, say 85 degrees C in a 20 degree C room, lose more heat due to radiation or conduction. In general, do common objects lose more heat due to radiation vs. conduction?
     
  2. jcsd
  3. Aug 16, 2012 #2

    mfb

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    Staff: Mentor

    Evaporation is the main effect for hot coffee.

    In general, it depends on the materials used and the temperature difference, and you can even have different regions with different dominating effects in the same setup.
     
  4. Aug 16, 2012 #3

    russ_watters

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    Of the four choices, conduction is likely the least. The mix of the other three would depend on the cup. Ie, if it is uninsulated, convection and radiation would be proportionally higher.
     
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