Pressure at hill stations will be
Pressure at hill stations will be Correct Answer Less than 1 atm
Concept:
Atmospheric pressure: The force per unit area pushed on any surface by the Earth's atmosphere is called atmospheric pressure.
- Atmospheric pressure decreases with an increase in the altitude for any region.
- This is because high altitude places do not have sufficient air above them, pushing down.
- Barometers used to measure the pressure of the atmosphere.
The atmospheric pressure is given by:
P = ρ g h
Where ρ = Density of the fluid/air, g = Acceleration due to gravity and h = Depth
- The standard atmospheric pressure (1 atm) is equal to the pressure which supports the 760 mm column of mercury at 0 °C at sea level.
- The atmospheric pressure at sea level is equal to the atmospheric pressure on the earth's surface.
The value of 1 atm is given by:
P = 1.013 x 105 Pa = 1013 hPa = 1013 mb = 1 atm = 760 torr.
Explanation:
- The atmospheric pressure at sea level is 1 atm.
- Hill stations are always at a height(generally, >1200 m).
- Therefore, from P = ρ g h, pressure will be less at heights.
Hence pressure will always be less than 1 atm at hill stations.
Additional InformationFactors responsible for Atmospheric pressure:
There are some major factors that are usually responsible for atmospheric pressure, which as follows:
- Altitude:
- Altitude means actual height above the sea level or above it may be above the plain ground.
- Altitude is used in general in aviation, especially in parachuting, flying, gliding, and surveying also it is used.
- In geometry, it is termed the height of the substance.
- Relation of Atmospheric pressure with Altitude:
- Atmospheric pressure decreases with an increase in the altitude for any region.
- The pressure at any geographical level in the atmosphere may be cumulated as the total weight of the air above one unit area.
- At higher altitudes, there are a few molecules of air above a specified surface than a similar surface of lower levels.
- Earth's Rotation:
- The earth's rotation affects the pressure of the atmosphere in various ways.
- This happens because of the rotation swelling to the near of our equator.
- The rotation causes a displacement of fluid especially in the hemisphere, which is converted to the clockwise direction, is called the Coriolis effect.
মোঃ আরিফুল ইসলাম
Feb 20, 2025