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प्रश्न
What is meant by the term ‘Atmospheric Pressure’?
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उत्तर
Atmospheric Pressure refers to the force per unit area exerted against a surface by the weight of the air above that surface. The pressure is expressed in millibars (mb) and measured with a mercury barometer. The average atmospheric pressure at sea level is 1013.25 mb or 760 mm (the) height of the column of mercury in a barometer at sea level). Atmospheric Pressure decreases with height.
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संबंधित प्रश्न
Describe a simple experiment to illustrate that air exerts pressure.
Give reason for the following:
Water does not run out of a dropper unless its rubber bulb is pressed.
Give two reasons for use of mercury as a barometric liquid.
What is an aneroid barometer? Draw a neat and labelled diagram to explain its construction and working.
The normal atmospheric pressure is :
Give reasons for the following:
As we go higher, the atmospheric pressure decreases.
Select the correct option.
The atmospheric pressure on the earth’s surface is approximately
Describe an experiment to demonstrate that air exerts pressure.
On the earth, air pressure is ______
