Advertisements
Advertisements
प्रश्न
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
Advertisements
उत्तर
To measure the atmospheric pressure, first the leather cup is raised up or lowered down with the help of the screw S so that the ivory pointer I just touches the mercury level in the glass vessel. The position of the mercury level in the barometer tube is noted with the help of main scale and the vernier scale. The sum of the vernier scale reading to the main scale reading gives the barometric height.
संबंधित प्रश्न
Explain why holes are made in hanging banners and hoardings.
What physical quantity is measured in torr? How is it related to the S.I. unit of the quantity?
What is meant by the statement 'the atmospheric pressure at a place is 76 cm of Hg'? State its value in Pa.
What is an altimeter? State its principle. How is its scale calibrated?
The unit torr is related to the barometric height as :
State two advantages of an aneroid barometer.
State two factors which affect the atmospheric pressure as we go up.
Describe an experiment to demonstrate that air exerts pressure.
At higher altitudes, air becomes ______
Clouds float in atmosphere because of their low ______.
