Advertisements
Advertisements
Question
State two experiences that made you think that air exerts pressure.
Advertisements
Solution 1
We have experienced that when we blow a balloon, the balloon becomes tight. If we try to fill more air, then the balloon will burst after an extent. This happens because air exerts pressure.
We have also experienced the movement of fringes of windows and doors of our houses when wind blows in a high speed. This also happens because air exerts pressure.
Solution 2
1) Balloons and balls can be used only when they are inflated with air. When balloon is overfilled with air it bursts due to excessive air pressure.
2) Compressed air is used in the brake system for stopping trains.
RELATED QUESTIONS
How does the pressure at a certain depth in sea water differ from that at the same depth in river water? Explain your answer.
State two uses of a barometer.
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
What do the following indicate in a barometer regarding weather : gradual fall in the mercury level
The atmospheric pressure at earth's surface is P1 and inside mine is P2. They are related as :
Give reasons for the following:
The Westerlies in the Southern Hemisphere blow with greater force than those in the Northern Hemisphere.
Give reasons for the following:
Temperature and pressure are inversely related to one another.
How does the atmospheric pressure change with altitude?
What is the purpose of a barometer? State two major defects of a simple barometer.
