1 Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in Fig. Determine the pressure difference between the two pipelines. Take the density of seawater at that location to be r = 1035 kg/m3. Can the air column be ignored in the analysis? Fresh- water -Air 30 cm Sea- 70 cm water 50 cm 10 cm + -Mercury

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