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प्रश्न
Explain the following :
Water does not run out of a dropper unless its rubber bulb is pressed .
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उत्तर
Water is held inside the dropper against the atmospheric pressure because the pressure due to height column of liquid inside the dropper is less than the atmospheric pressure. By pressing the dropper we increase the pressure inside the dropper and when it becomes greater than the atmospheric pressure the liquid comes out of the dropper.
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संबंधित प्रश्न
Write the numerical value of the atmospheric pressure on the surface of earth in pascal.
What is an aneroid barometer? Draw a neat and labelled diagram to explain its construction and working.
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.
Briefly state the variations in the vertical distribution of pressure.
State two factors which affect the atmospheric pressure as we go up.
Give reason:
Air pressure decreases with increasing altitude.
On the earth, air pressure is ______
What is meant by atmospheric pressure?
The highest air pressure at sea level was recorded at ______ Russia.
