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प्रश्न
Why can't water be used in place of mercury in a barometer?
टीपा लिहा
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उत्तर
Water can't be used in place of mercury in a barometer because of its low density. It would require a 10.34 m long tube to measure 1 atmospheric pressure which is not practically possible while mercury having high density (13.6 g/cc) would require only 0.76 m long pipe which is practically possible.
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संबंधित प्रश्न
State two experiences that made you think that air exerts pressure.
Give reason for the following:
A balloon collapses when air is removed from it.
Why is the barometric height used as unit to express the atmospheric pressure?
How is the barometric height of a simple barometer affected if Its tube is pushed down into the trough of mercury?
Give two reasons for use of mercury as a barometric liquid.
How does atmosphere pressure vary with height?
What does a falling barometer indicate?
Describe an experiment to demonstrate that air exerts pressure.
If there is low pressure at the equator, what will be the condition of air pressure in the Arctic Zone?
What effect does temperature have on air pressure?
