Home » Past Questions » Physics » In the J-tube above, Y and X are on the same horizontal level and 30cm3 of air i...

In the J-tube above, Y and X are on the same horizontal level and 30cm3 of air i...


Question

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

Options

A) 15 cm3

B) 25 cm3

C) 35 cm3

D) 45 cm3


The correct answer is B.

Explanation:

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

More Past Questions:


Dicussion (1)