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Water density and compressibility

  1. Oct 16, 2011 #1


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    Water is compressible, but it takes a lot of pressure to increase the density by 10 or 20%

    Deep Ocean pressure measurements

    http://seagrant.gso.uri.edu/factsheets/abyss.html [Broken]



    Pure water would have a density of 1205.154 kg/m3 at pressure = 1086 bar
    1086 bars (15750 psi) from en.wikipedia.org/wiki/Mariana_Trench

    or a density of 1100 kg/m3 at pressure at 263.835 bar, which is about 20% higher than the pressure in a PWR.

    Salt water has a maximum density of ~12700 kg/m3.
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Oct 16, 2011 #2


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    Was there a question in there?
  4. Oct 17, 2011 #3
    That's one reason water is used as a hydraulic fluid. Add a little anti-bacterial and presto! Water is also under immense pressure in the lithosphere. Leucogranites form when expelled water melts its new host rock environment - found in places like Tibet. My home state of Texas sits ontop of North America's 3rd largest aquifer - the Gulf Coast aquifer, formed from high pressures of slumping mud wedges going into the Gulf of Mexico basin.
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