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प्रश्न
What do you understand by atmospheric pressure?
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उत्तर
The thrust exerted per unit area of the earth surface due to column of air, is called the atmospheric pressure on the earth surface.
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संबंधित प्रश्न
Mention two demerits of a simple barometer and state how they are removed in a Fortin barometer .
How does the atmospheric pressure change with altitude? Draw an approximate graph to show this variation.
At sea level, the atmospheric pressure is 76 cm of Hg. If air pressure falls by 10 mm of Hg per 120m of ascent, what is the height of a hill where the barometer reads 70 cm Hg. State the assumption made by you.
What is meant by the term ‘Atmospheric Pressure’?
Atmospheric pressure at sea level is 76 cm of mercury. Calculate the vertical height of the air column exerting the above pressure. Assume the density of air 1.29 kgm−3 and that of mercury is 13600 kgm−3. Why the height calculated by you is far less than the actual height of the atmosphere?
What effect does temperature have on air pressure?
Air pressure is expressed in ______.
Why is it not advisable to use a fountain pen while travelling in an aeroplane?
A low-pressure system is also called ______ and ______.
The increase in internal energy of 1 kg of water at 100°c when it is converted into steam at the same temperature and at 1 atmospheric pressure will be ______.
(density of steam is 0.6 kg m-3, latent heat of vaporisation of water = 2.25 × 106 J kg-1).
