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प्रश्न
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
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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.
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संबंधित प्रश्न
Fill the missing word in the blank spaces in the following statements:
Air moves from a region of __________ pressure to a region of ________ pressure.
The atmospheric pressure is nearly 105 Pa.
We do not feel uneasy even under the enormous atmospheric pressure. Give a reason.
Why does the liquid rise in a syringe when its piston is pulled up?
Why is the barometric height used as unit to express the atmospheric pressure?
How is the barometric height of a simple barometer affected if Its tube is slightly tilted from vertical?
Give two reasons for use of mercury as a barometric liquid.
Air pressure is expressed in ______.
What is meant by atmospheric pressure?
The highest air pressure at sea level was recorded at ______ Russia.
