One thought on “2013 S4 EOY P1 Q09”

  1. Pressure at P (measured in units of mm HG) is given by:
    P_P = P_0 + 30.0
    (where P_0 is atmospheric pressure)

    Pressure at Q is given by P_Q = P_0 – 50.0

    Applying Boyle’s Law we get

    P_1V_1=P_2V_2

    P_PV_P=P_QV_Q

    (P_0 + 30.0)(75.0timesA)=(P_0-50.0)(83.4timesA)

    Which can easily be solved to find P_0

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