Question:
why does the atmosphere pressure decreses when we go to more height
Answer:
The atmospheric pressure is the pressure exerted by a coulmn of air from the top of the atmosphere to the surface of earth.
And as we know that air pressure decrease as we go high,similarly atmospheric pressure also decreases with height.
See the above figure, this shows a coulmn of atmospheric pressure on surface.
H0 is on surface, and H1 H2 H3 are heights from surface of earth.
So, you can clearly see in figure that when a person goes on high altitude, he/she experience less atmospheric pressure.
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