Atmosphere exerts enormous pressure to our body but we do not feel it, why?
1 Answer
Our internal body pressure is nearly equal to the outwards pressure. This balances blood pressure and atmospheric pressure. Thus, we do not feel the enormous pressure of the atmosphere.
Things to remember from Pressure
- The force acting perpendicularly on per unit surface area is called pressure. Its SI unit is N/m2 or Pascal.
- The pressure exerted by the atmosphere is called atmospheric pressure.
- The normal atmospheric pressure i.e. atmospheric pressure at the sea level is 760 mm of Hg.
- Air has weight and it can be easily be compressed.
- Air occupies space.
- Atmospheric pressure decreases with the increase in altitude.
- The pressure exerted by the liquid is called the liquid pressure.
- Liquid exerts pressure at the bottom of the vessel as well as on the sides of the vessel in which it is kept.
- Liquid pressure increases with the increase in depth.
- Liquid exerts pressure equally in all directions.
- When the pressure is applied to an enclosed liquid, then it transmits pressure equally in all directions. This is called Pascal's law.
- Liquid pressure increases with the increase in the density of the liquids.
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