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प्रश्न
How is water drawn up from a well by a water pump?
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उत्तर
In a water pump, on pulling the piston up, the pressure of air inside the siphon decreases and the atmospheric pressure on the water outside increases. As a result, the atmospheric pressure pushes the water up in pump.
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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 earth surface in pascal.
How does the pressure at a certain depth in sea water differ from that at the same depth in river water? Explain your answer.
Explain the following :
A balloon collapses when air is removed from it.
Why is the barometric height used as unit to express the atmospheric pressure?
What do the following indicate in a barometer regarding weather : Gradual rise in the mercury level?
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.
What will be the effect on air pressure if the temperature drops? Why?
The highest air pressure at sea level was recorded at ______ Russia.
