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Homework Help: Pressure in a closed tube

  1. Dec 1, 2009 #1
    1. The problem statement, all variables and given/known data
    The container shown in the figure is filled with oil. It is open to the atmosphere on the left.
    What is the gauge pressure at point A? Point A is 50cm high from the ground and 50 cm from the top.

    2. Relevant equations

    3. The attempt at a solution
    I took 1 atompshere in Pa of 1.013*105+900*G which is 9.8*.5m and I came up with an answer of 1.057 then I subtracted the gauge pressure of 101.3 kPa and solved for the final answer to be 4,400Pa.

    Does anyone come up with the same answer?
  2. jcsd
  3. Dec 1, 2009 #2


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    Homework Helper

    What's the density of the oil? Gauge pressure is just (density)gh, so you don't have to calculate total pressure and then subtract atmospheric pressure.
  4. Dec 1, 2009 #3
    The denisty of oil is 900kg/m3
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