Question on: JAMB Physics - 1999

In the J-tube above, Y and X are on the same horizontal level and 30cm3 of air is trapped above Y when the atmospheric pressure is 75cm Hg, calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X
A
15 cm3
B
25 cm3
C
35 cm3
D
45 cm3
Ask EduPadi AI for a detailed answer
Correct Option: B

Since the temperature of the air is to remain Constant => P1V1 = P2V2

∴ 75 x 30 = (75 + 15) x V2

75 x 30 = 90 x V2

=> V2 = 75 x 30
_90

= 2250
_90

= 25cm2

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