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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
Give reason for the following:
A balloon collapses when air is removed from it.
Describe an experiment to demonstrate that air exerts pressure.
Explain how is the height of mercury column in tube of a simple barometer, a measure of the atmospheric pressure.
State two uses of a barometer.
Explain briefly the factors that affect Atmospheric Pressure.
Why do not we feel uneasy even under enormous pressure of the atmosphere above as?
Define Low pressure.
Give Reason for the following
Our ears pop in Airplanes.
