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Barometer - basic

  1. Nov 9, 2015 #1
    1. The problem statement, all variables and given/known data
    borometer.jpg

    2. Relevant equations
    The given ans is 9600 as attached above, but i get 15 000.

    3. The attempt at a solution
     
    Last edited: Nov 9, 2015
  2. jcsd
  3. Nov 9, 2015 #2

    billy_joule

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    Show your attempt so we can see where you went wrong.
     
  4. Nov 9, 2015 #3
    Snapshot.jpg
     
  5. Nov 10, 2015 #4

    DrClaude

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    Lets approach this from a physical point of view. What should be equal in both cases, and how does that relate to the density?
     
  6. Nov 11, 2015 #5

    andrevdh

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    Why do the liquid go up into the tube?
     
  7. Nov 11, 2015 #6
    Pressure acting on both liquids is the same
     
  8. Nov 11, 2015 #7

    andrevdh

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    Can you relate the pressure to the height of the column of liquid in the tube?
     
  9. Nov 20, 2015 #8

    andrevdh

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    Then construct the equation pX = pY for the two liquid columns, that is the two columns are created by the same pressure.
     
  10. Nov 26, 2015 #9
    Boyle Law>???
     
  11. Nov 26, 2015 #10

    DrClaude

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    It has nothing to do with Boyle's law. It is actually a simple problem of statics.

    andrevdh almost gave you the answer in his replies.
     
  12. Nov 26, 2015 #11

    SteamKing

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    How do you apply Boyle's Law to a vacuum? :wink:
     
  13. Nov 27, 2015 #12

    andrevdh

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    Just try the calculation again stuc and show us your results.
     
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