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Homework Help: Derive temp conversion formula

  1. Jan 22, 2009 #1
    1. The problem statement, all variables and given/known data

    the fahrenheit temp scale is defined to that ice melts at 32 F and water boils at 212 F. Derive formulas for converting fahrenheit to celsius and back.

    2. Relevant equations
    c=5/9(f-32)

    3. The attempt at a solution
    ok so i figured that 212-32= 180
    and
    100-0=100
    so the ratio of c/f= 5/9
    i don't know how to get the 32 part into the equation
     
  2. jcsd
  3. Jan 22, 2009 #2

    Dick

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    Homework Helper

    0C=32F. So a fahrenheit temperature f is (f-32) fahrenheit degrees above 0C. Now just convert the (f-32) fahrenheit degrees to celsius degrees.
     
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