Question

Find an
expression of atmospheric pressure at any
point on earth.​

Answer 1

Answer:

The mean atmospheric pressure at sea level is given equivalently as P = 1.013x105 Pa = 1013 hPa = 1013 mb = 1 atm = 760 torr.

Answer 2

Answer:

The expression of atmospheric pressure at any point on earth is given by the formula P = ρgh, where P is the atmospheric pressure, ρ is the density of air, g is the acceleration due to gravity, and h is the height of the air column above the point.

Explanation:

• Atmospheric pressure is the force per unit area exerted by the weight of the air above a point on the earth's surface.
• This pressure is affected by various factors such as altitude, temperature, and weather conditions.
• The expression for atmospheric pressure is derived from the hydrostatic equation, which relates the pressure in a fluid to its density and height.
• The density of air varies with altitude, temperature, and humidity, but it is generally around 1.2 kg/m3 at sea level.
• The acceleration due to gravity is a constant value of 9.8 m/s2.
• Thus, the atmospheric pressure decreases with increasing altitude as the height of the air column above the point decreases.

Keywords: atmospheric pressure, density of air, hydrostatic equation, altitude, humidity, acceleration due to gravity.

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