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प्रश्न
What is an altimeter? State its principle. How is its scale calibrated?
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उत्तर
An altimeter is a device used in aircraft to measure its altitude.
Principle: Atmospheric pressure decreases with the increase in height above the sea level; therefore, a barometer measuring the atmospheric pressure can be used to determine the altitude of a place above the sea level.
The scale of altimeter is graduated with height increasing towards left because the atmospheric pressure decreases with increase of height above the sea level.
संबंधित प्रश्न
Describe a simple experiment to illustrate that air exerts pressure.
Write the numerical value of the atmospheric pressure on the surface of earth in pascal.
We do not feel uneasy even under enormous pressure of the atmosphere above as well as around us. Give a reason.
Explain the following :
A balloon collapses when air is removed from it.
Explain the following :
Water does not run out of a dropper unless its rubber bulb is pressed .
How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?
Why does nose start bleeding on high mountains?
Explain briefly the factors that affect Atmospheric Pressure.
If there is low pressure at the equator, what will be the condition of air pressure in the Arctic Zone?
Define one atmosphere.
