An ideal gas is trapped between Hg thread of 12 Cm and the closed lower end of a narrow vertical tube of uniform cross section.Length of the air column is 20.5cm , when the open end is kept upward If the tube is making 30 degrees with the horizontal then the length of the air column is (assuming temperature to be constant and atmospheric pressure is equal.to 76 Cm of Hg )
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11th
Physics
Kinetic Theory
Molecular Nature of Matter
An ideal gas is trapped bet...
PHYSICS
Asked on December 30, 2019 byMudali Merlin
An ideal gas is trapped between Hg thread of 12 cm and the closed lower end of a narrow vertical tube of uniform cross section. Length of the air column is 20.5 cm, when the open end is kept upward. If the tube is making 300with the horizontal then the length of the air column is (assuming temperature to be constant and atmospheric pressure = 76 cm of Hg)
A .
22 cm
B .
$$18\ cm
C .
24 cm
D .
20.2 cm
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Assuming the process to be isothermal, we can sa for an ideal gas,
P1V1=P2V2
(76+12)(20.5)=(76+12sin(300))l, since in second case, the vertical height of mercury column will be 12sin(300).
This gives l=22cm.