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KVPY SA Exam 2011 Question Paper

Question : 21

Total: 80

We sit in the room with windows open. Then

air pressure on the floor o f the room equals the atmospheric pressure but the air pressure on the ceiling is negligible
air pressure is nearly the same on the floor, the walls and the ceiling
air pressure on the floor equals the weight of the air column inside the room (from floor to ceiling) per unit area
air pressure on the walls is zero since the weight of air acts downward 10

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