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We sit in the room with windows open. Th...

We sit in the room with windows open. Then

A

air pressure on the floor of the room equals the atmospheric pressure but the air pressure on the ceiling is negligible

B

air pressure is nearly the same on the floor, the walls and the ceiling

C

air pressure on the floor equals the weight of the air column inside the room (from floor to ceiling) per unit area

D

air pressure on the walls is zero since the weight of air acts downward

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The correct Answer is:
B
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