Advertisements
Advertisements
प्रश्न
What is meant by the term ‘Atmospheric Pressure’?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give reason for the following:
A balloon collapses when air is removed from it.
How is water drawn up from a well by a water pump?
How is the barometric height of a simple barometer affected if Its tube is slightly tilted from vertical?
How does the atmospheric pressure change with altitude? Draw an approximate graph to show this variation.
What do the following indicate in a barometer regarding weather : gradual fall in the mercury level
The radius of the press plunger and pump plunger are in ratio of 50 : 4. If an effort of 20 kgf acts on the pump plunger, calculate the maximum effort which the press plunger can over come.
What does a falling barometer indicate?
A solid weighs 2.10 N in air. It has a relative density of 8.4. How much will the body weigh if placed: In water
It is much easier to burst an inflated balloon with a needle than by a finger. Explain.
