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Q3. *
A vertical tube, closed at one end, is immersed in water. A column of air is trapped inside the
tube.
O
A
C
B
water
D
20.0 cm
30.0 cm
The density of water is 1000 kg m-³.
What is the difference between the pressure of the air in the tube and the atmospheric pressure?
A
1960 Pa
B 2940 Pa
C 4910 Pa
D 7850 Pa
30.0 cm
air
vertical tube
water surface

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