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प्रश्न
Give reason for the following:
Water does not run out of a dropper unless its rubber bulb is pressed.
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उत्तर
Atmospheric pressure acting from outside the dropper balances the pressure exerted by water and water does not come out of a dropper. On pressing the dropper inside pressure of water becomes more than outside atmospheric pressure and water run out.
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संबंधित प्रश्न
State two experiences that made you think that air exerts pressure.
Write the numerical value of the atmospheric pressure on the surface of earth in pascal.
What is the purpose of a barometer?
Why is the barometric height used as unit to express the atmospheric pressure?
Distinguish between the following:
Isobars and Isotherms
What will be the effect on air pressure if the temperature drops? Why?
Air pressure is expressed in ______.
The atmosphere is a layer of gases surrounding the planet.
The standard air pressure at sea level is ______.
The human lung is well adapted to breathe at a pressure of ______ k Pa.
