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प्रश्न
How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?
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उत्तर
The space above mercury is a vacuum. This empty space is called 'Torricellian vacuum'.
This can be shown by tilting the tube till the mercury fills the tube completely. Again when the mercury column becomes stationary, the empty space is created above the mercury column. If somehow air enters into the empty space or a drop of water gets into the tube, it will immediately vaporize and the air will exert pressure on mercury column due to which the barometric height will decrease.
संबंधित प्रश्न
The atmospheric pressure is nearly 105 Pa.
Explain the following :
Water does not run out of a dropper unless its rubber bulb is pressed .
At sea level, the atmospheric pressure is 1.04 x 105 Pa. Assuming g = 10 m s-2 and density of air to be uniform and equal to 1.3 kg m-3, find the height of the atmosphere.
Briefly state the variations in the vertical distribution of pressure.
What is meant by atmospheric pressure?
What is the purpose of a barometer? State two major defects of a simple barometer.
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
Give reasons:
Why artificial pressure creates in Aircraft?
______ is used to show the distribution of air pressure.
The highest air pressure at sea level was recorded at ______ Russia.
