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1-69 Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in Fig. P1-69. Determine the pressure difference between the two pipelines. Take the density of sea- water at that location to be p = 1035 kg/m³. Can the air col- umn be ignored in the analysis? Air Fresh 40 cm water Sea 70 cm 60 cm water 10 cm Mercury FIGURE P1-69

1-69 Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in Fig. P1-69. Determine the pressure difference between the two pipelines. Take the density of sea- water at that location to be p = 1035 kg/m³. Can the air col- umn be ignored in the analysis? Air Fresh 40 cm water Sea 70 cm 60 cm water 10 cm Mercury FIGURE P1-69

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Repeat problem 1-69 by replacing the air with oil whose specific gravity is 0.72.
C. the dussitiep of seawati, and mescury are given to .be Psea = 1035 Kam 13600 kalyo Take densily of watis (Pu) = 1o00kolm? stanking uith foressure in forush watis pipe O and moving along the tube by eah' lign unal reach the sea ulatis fipe ®. %3D R-2 = -fwahw + Pig ahug + lai, thais – beadhsea + Pais hais – (gea hgea] %3D The effect of ais column on foresure is neglisible hesce, Pi – Pz = al Prghng – Pwhw - PBe hsea] 35x 4o 9.81 13G00 x locm-1000x60cm-1035 - 9.81 13 600 xo-1 - lo00xo.6 – 1035xo.47 33१५.20 Pa R-2= 3.3942 Kpa! detigmine onty the aiscolung porusture la = fai, a hain Pa = 112 kalm?x 9. 81 m/sx Pa %3D 8.2404 pa Pa 0-00824o4 KPa
Transcribed Image Text:C. the dussitiep of seawati, and mescury are given to .be Psea = 1035 Kam 13600 kalyo Take densily of watis (Pu) = 1o00kolm? stanking uith foressure in forush watis pipe O and moving along the tube by eah' lign unal reach the sea ulatis fipe ®. %3D R-2 = -fwahw + Pig ahug + lai, thais – beadhsea + Pais hais – (gea hgea] %3D The effect of ais column on foresure is neglisible hesce, Pi – Pz = al Prghng – Pwhw - PBe hsea] 35x 4o 9.81 13G00 x locm-1000x60cm-1035 - 9.81 13 600 xo-1 - lo00xo.6 – 1035xo.47 33१५.20 Pa R-2= 3.3942 Kpa! detigmine onty the aiscolung porusture la = fai, a hain Pa = 112 kalm?x 9. 81 m/sx Pa %3D 8.2404 pa Pa 0-00824o4 KPa
1-69 Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in Fig. P1–69. Determine the pressure difference between the two pipelines. Take the density of sea- water at that location to be p = 1035 kg/m³. Can the air col- umn be ignored in the analysis? Air Fresh 40 cm water Sea 70 cm 60 cm water 10 cm Mercury FIGURE P1-69
Transcribed Image Text:1-69 Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in Fig. P1–69. Determine the pressure difference between the two pipelines. Take the density of sea- water at that location to be p = 1035 kg/m³. Can the air col- umn be ignored in the analysis? Air Fresh 40 cm water Sea 70 cm 60 cm water 10 cm Mercury FIGURE P1-69
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