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Homework Help: Fractional change in density of mercury

  1. May 13, 2010 #1
    1. The problem statement, all variables and given/known data

    What is the fractional change in the density of mercury when temperature changes for 30oC to -10oC. The density of mercury at 30oC is 13600 kgm-3.



    2. Relevant equations

    dt=do(1-gamma t)

    3. The attempt at a solution

    gamma=180x10^-6
    t=30
    dt=13600
    13600=do(1-180x10^-6*30)
    do=13600/(1-180x10^-6*30)
    do=13673.839

    gamma=180x10^-6
    t=-10
    do=13673.839
    dt= ?
    dt=13673.839 (1-180x10^-6*-10)
    dt=13698.45

    fractional change = 13600/13698.45

    I just don't think that I am understanding this properly....
     
  2. jcsd
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