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प्रश्न
Name the physical quantity which is expressed in the unit 'atm'. State its value in pascal.
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उत्तर
At normal temperature and pressure, the barometric height is 0.76 m of Hg at sea level which is taken as one atmosphere.
1 atmosphere = 0.76 m of Hg = 1.013 x 105 pascal
संबंधित प्रश्न
Describe an experiment to demonstrate that air exerts pressure.
A partially inflated balloon is placed inside a bell jar connected to a vacuum pump. On creating vacuum inside the bell jar, balloon gets more inflated. How does the pressure change: increase, decrease or remains same, inside the (a) bell jar, (b) balloon?
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.
Give reasons for the following:
Temperature and pressure are inversely related to one another.
What is meant by the term ‘Atmospheric Pressure’?
State briefly, how and why the atmospheric pressure of a place varies with the altitude. Draw an approximate graph to illustrate this variation.
What does a falling barometer indicate?
Why is it not advisable to use a fountain pen while travelling in an aeroplane?
What does low pressure and high pressure lead to?
