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Homework Help: Simple temperature conversion problem

  1. May 24, 2013 #1
    1. The problem statement, all variables and given/known data

    I know this sounds too easy, but somehow webassign refuses my answers

    The temperature difference between the inside and the outside of a home on a cold winter day is 64°F.

    (a) Express this difference on the Celsius scale.

    (b) Express this difference on the Kelvin scale.

    2. Relevant equations


    3. The attempt at a solution

    Simply using the equations I got
    C=160/9 or 17.7777778
    K=2617/9 or 290.77777778

    I inputted them three times in three forms, what is wrong with my answers?
  2. jcsd
  3. May 24, 2013 #2


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    Gold Member

    Your equations are for converting one temperature from one scale to another. What you are given is a temperature difference. Suppose it's T Deg F outside and T+64 inside, then try your equations on each and take the difference after conversion. What do you notice?
  4. May 24, 2013 #3
    Thank you very much haruspex, I should have not subtracted 32 from the given temperature difference.
    The right answer should be (64)(5/9)= 35.6
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