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Very simple question - is pressure 1m down in water.

  1. Feb 17, 2005 #1
    Very simple question - is pressure 1m down in water.......

    is it pgh?? (1000*9.81*1)...

    or is it P2 = P1 + pgh.. that is.. (101.3kPa) + (1000*9.81*1)


    im so confused :/
     
  2. jcsd
  3. Feb 17, 2005 #2

    dextercioby

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    Yes.I'm confused,too,because you used the letter "p" both for pressure (good thing) and for mass volumic density (bad thing)...

    Daniel.
     
  4. Feb 17, 2005 #3
    the small p is rho

    and i figured it out :)
    its the 2nd eqn
     
  5. Feb 17, 2005 #4

    dextercioby

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    Of course,that's the total pressure acting on a body immersed in a fluid.However,you might have noticed it's ~11/10 times larger than the one due to air at Earth's surface,which means a difference of ~0.1 atm due to fluid pressure...

    Daniel.
     
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