1. The pressure difference between two air tanks A and B is measured by a U-tube manometer, with mercury as the manometer liquid. The barometric pressure is 700 mm Hg. (a) What is the absolute pressure in the tank A? (b) What is the gauge pressure in the tank A? A air Pa Zo wwwwwwww 2 cm B air Pb Hg h₂ - 86 cm

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