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Homework Help: Percentage Decrease in Specific Volume using Bulk Modulus from Table

  1. Aug 28, 2009 #1
    The problem statement, all variables and given/known data

    "Water in a hydraulic press is subjected to a pressure of 4500 psia at 68 F. If the initial pressure is 15 psia, approximately what will be the percentage decrease in specific volume. Use Table 2.1 (below)."

    2. Relevant equations

    http://img86.imageshack.us/img86/7606/scanx200908280001.jpg [Broken]

    http://img198.imageshack.us/img198/2330/scanx200908280002.jpg [Broken]

    3. The attempt at a solution

    It seems easy enough:

    http://img38.imageshack.us/img38/6264/scanx200908280003.jpg [Broken]

    but the back of the book gives 1.34%; what is wrong with my solution?
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Aug 28, 2009 #2
    I came up with the correct solution taking the average value of E at psia = 15 and 4500 (E = [348000 + 320000]/2); how would I justify this?
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