Example 2 Given:Pp=101 325 Pa,height difference of the mercury columns in the U-shape tube AH=300 mm,reading of gauge B is 0.254 3 MPa. Find:Pain room A;PeA B Solution: 马 PB -P6+PeB =101325Pa+0.2543×106Pa =355600Pa 上游充通大学 February 28,2019 21 SHANGHAI JLAO TONG UNIVERSITYFebruary 28, 2019 21 Given: pb =101 325 Pa，height difference of the mercury columns in the U-shape tube ΔH = 300 mm，reading of gauge B is 0.254 3 MPa. Find: pA in room A; peA Example 2 b e 6 101 325 Pa 0.254 3 10 Pa 355 600 Pa p p p B B       Solution：