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Write the numerical value of the atmospheric pressure on the surface of earth in pascal.
Name the physical quantity which is expressed in the unit 'atm'. State its value in pascal.
How does the atmospheric pressure change with altitude? Draw an approximate graph to show this variation.
State two factors which affect the atmospheric pressure as we go up.
What do the following indicate in a barometer regarding weather : Gradual rise in the mercury level?
State two advantages of an aneroid barometer.
How does the atmospheric pressure change with altitude?
At higher altitudes, air becomes ______
Figure shows a child blowing air with a straw near the opening of another straw which has its other end in a soft drink bottle. It was observed that the level of the soft drink in the straw rises up as soon as air is blown over its open end. Which one of the following best explains the reason for rise in level of the drink?
