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OpenStudy (anonymous):
Inside a pressurized cabin, a 1m long barometer tube held vertically in a mercury tub has 700 mm long mercury column in the tube. There is some air above the mercury column in the tube. The tube is slowly tilted by an angle with the vertical. The mercury column now is 900 mm along the length of the tube. The value of pressure in the cabin in units of mm of mercury is o60 A 760 B 825 C 800 D 900
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