Home
Class 11
PHYSICS
The reading in a barometer changes from ...

The reading in a barometer changes from 75 cmHg to 25 cmHg when `10 cm^3` of air of atmospheric pressure is introduced in the vaccum space of the barometer tube. What is the volume of air in the tube?

Text Solution

Verified by Experts

Pressure of confined air=75-25=50 cmHg.
Initial volume of air `V_1=10 cm^3` and initial pressure `p_1=75 cmHg`
Final volume of air =`V_2 cm^3` and final pressure `p_2= 50 cmHg`
Using Boyle.s law `p_1V_1=p_2V_2` we get
`V_2=(p_1V_1)/p_2=(75times10)/50=15`
So the volume occupied by the air inside the barometer is `15 cm^3`.
Promotional Banner

Topper's Solved these Questions

  • EXPANSION OF GASES

    CHHAYA PUBLICATION|Exercise HIGHER ORDER THINKING SKILLS (HOTS ) QUESTIONS|25 Videos

  • EXPANSION OF GASES

    CHHAYA PUBLICATION|Exercise EXERCISE (MULTIPLE CHOICE QUESTION)|20 Videos

  • ELASTICITY

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|10 Videos

  • EXPANSION OF SOLIDS AND LIQUIDS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|2 Videos

Similar Questions

Explore conceptually related problems

The reading of a barometer decreases from 75 cmHg to 65 cmHg when some air is introduced in the vaccum space of the tube.Initial length of the space was 6 cm.IF the area of cross section of the tube is 1 cm^2 What is the volume of this air at standard pressure?

Self-inductance of an air core solenoid increases from 0.01 mH to 10 mH when an iron core is introduced in it. What is the relative magnetic permeability of iron?

When an air bubble rises from the bottom of a sea its volume increases to 4 times its initial value. IF the atmospheric pressure is 76 cmHg and the temperatures at the bottom and the surface of the sea are the same. Then what will be the depth of the sea? Density of mercury= 13.6 g.cm^-3 .

The tyre of a motorcar bursts suddenly when air was being pumped in it. The internal pressure became 3 times the atmospheric pressure during pumping. If the initial temperature of the air inside the tyre is 27^(@)C , what will be the decrease in temperature of air due to the bursting of tyre? for air, gamma = 1.4 .