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Pressure problem(Fluid mechanic)

  1. May 22, 2012 #1
    1. The problem statement, all variables and given/known data

    enclosed, thanks for checking

    2. Relevant equations

    P = ρgh

    3. The attempt at a solution

    I have try to add up all pressure in the tank
    (including gauge pressure, pressure of the oil(ρg*0.5), pressure of the water(ρg*0.8))
    but still can't balance out the equation since the answer of part A is 1.4m

    also, I don't have any clue about part B

    thanks if anyone can give me any help
     

    Attached Files:

  2. jcsd
  3. May 22, 2012 #2

    haruspex

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    Let's see you working. In terms of depth of water, how much pressure at the bottom of the tank comes from:
    - The gas above the oil
    - The oil
    - The water in the tank?

    For B:
    - what is the pressure at the water/Hg boundary?
    - what height of Hg is that equivalent to?
     
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