Find the gauge and absolute pressures in the balloon and peanut jar shown in the

Question

Find the gauge and absolute pressures in the balloon and peanut jar shown in the figure below, assuming the manometer connected to the balloon uses water whereas the manometer connected to the jar contains mercury Open to atmosphere Open to Open to atmosphere Meter stick Meter stick Vacuum Meter stick pg = _hpg pats" parm-hpg pabs = parm + hpg Express in units of centimeters of water for the balloon and millimeters of mercury for the jar, taking h0.0268 m for each balloon gauge pressure balloon absolute pressure jar gauge pressure jar absolute pressure cm H20 cm H20 mm Hg mm Hg

Explanation / Answer

given

h = 0.0268 m

h = 2.68 cm

Pg = h cm of H2O

= 2.68 cm of H2O

Patm = 1.03 X 103 cm of H2O

Pabs = Patm + Pg

Pabs = 1.03 X 103 cm of H2O + 2.68 cm of H2O  

Pabs = 1.03268 X 103 cm of H2O

Pg = h mm of Hg

h = - 0.0268 m

h = - 26.8 mm

Pg = - 26.8 mm of Hg

Pabs = Patm + Pg

Pabs = 760 mm of Hg - 26.8 mm of Hg

Pabs = 733.2 mm of Hg

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final answers :

Patm = 1.03 X 103       cm of H2O

Pabs = 1.03268 X 103 cm of H2O

Pg = - 26.8                  mm of Hg

Pabs = 733.2               mm of Hg

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