Advertisements
Advertisements
Question
Mention two demerits of a simple barometer and state how they are removed in a Fortin barometer .
Advertisements
Solution
In a simple barometer, there is no protection for the glass tube but in Fortin's barometer, this defect has been removed by enclosing the glass tube in a brass case.
In a simple barometer, a scale cannot be fixed with the tube (or it cannot be marked on the tube) to measure the atmospheric pressure but Fortin's barometer is provided with a vernier calipers to measure the accurate reading.
APPEARS IN
RELATED QUESTIONS
State two experiences that made you think that air exerts pressure.
We do not feel uneasy even under enormous pressure of the atmosphere above as well as around us. Give a reason.
Describe an experiment to demonstrate that air exerts pressure.
Why does the liquid rise in a syringe when its piston is pulled up?
How is the barometric height of a simple barometer affected if Its tube is slightly tilted from vertical?
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
If there is low pressure at the equator, what will be the condition of air pressure in the Arctic Zone?
What will be the effect on air pressure if the temperature drops? Why?
Give reasons:
Why artificial pressure creates in Aircraft?
The air pressure at sea level is referred to as ______.
