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प्रश्न
State two experiences that made you think that air exerts pressure.
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उत्तर १
We have experienced that when we blow a balloon, the balloon becomes tight. If we try to fill more air, then the balloon will burst after an extent. This happens because air exerts pressure.
We have also experienced the movement of fringes of windows and doors of our houses when wind blows in a high speed. This also happens because air exerts pressure.
उत्तर २
1) Balloons and balls can be used only when they are inflated with air. When balloon is overfilled with air it bursts due to excessive air pressure.
2) Compressed air is used in the brake system for stopping trains.
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संबंधित प्रश्न
Name the physical quantity which is expressed in the unit 'atm'. State its value in pascal.
Explain briefly the factors that affect Atmospheric Pressure.
Atmospheric pressure at sea level is 76 cm of mercury. Calculate the vertical height of the air column exerting the above pressure. Assume the density of air 1.29 kgm−3 and that of mercury is 13600 kgm−3. Why the height calculated by you is far less than the actual height of the atmosphere?
Air pressure is expressed in ______.
One atmosphere is equivalent to 1,00,000 newton force acting on one square metre.
As we go from the equator of the earth to pole of the earth, the value of acceleration due to gravity ______.
______ is used to show the distribution of air pressure.
It is much easier to burst an inflated balloon with a needle than by a finger. Explain.
Tyre pressure of 30psi is almost ______ the atmospheric pressure.
