Question

What is atmospheric pressure?

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Answer 1

the pressure exerted by the weight of the atmosphere, which at sea level has a mean value of 101,325 pascals (roughly 14.6959 pounds per square inch).

Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere of Earth. The standard atmosphere is a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.

Formula

P_h= P_0 e^{\frac {-mgh}{kT}}

P_h = pressure at height h

P_0 = sea level pressure

g = acceleration due to gravity

k = Boltzmann's constant (ideal gas constant divided by Avogadro's number)

T = absolute temperature

m = mass of one air molecule

Answer 2

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It is the pressure exerted by the weight of the atmosphere, which at sea level has a mean value of 101,325 pascals (roughly 14.6959 pounds per square inch)