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Well type manometer

  1. May 7, 2015 #1
    In a reservoir of a well type manometer, the sealing liquid is mercury having a weight density of 132.5 KN/m^3. If the area of the well is 0.02m^2 and that of the tube is 40mm^2. Calculate the height of the measuring column if the applied differential pressure is 70KN/m^2.

    Relevant formulae: P1-P2
    =ρ.m(g)(h)(a2/a1 + 1)

    Attempt at question.

    70=132.5(9.81)(h)(0.00004/0.02 + 1)

    70=1335.98664(h)
    h=0.05239573354m
    =52.39573354mm

    Set up is similar as shown below

    The answer provided is 527mm. I can't spot any mistakes in my calculations too.
    Well-Type-Manometer.jpg
     
  2. jcsd
  3. May 7, 2015 #2
    Well, for one thing, you don't need the factor of 9.81 since that is already included in the "weight density" 132.5kN/m^3.

    Chet
     
  4. May 7, 2015 #3
    Hey thanks alot for pointing that out! Didn't realise I've made such a silly error. :D
     
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