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This graph shows how air pressure changes with altitude (the distance above sea level) as one moves upward in the atmosphere. The density of air is computed based on the mass of air molecules, divided by the volume of air. Density and pressure change similarly with height.
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The pressure below sea level is in a virtual air column or as achieved with an air filled closed pipe connected to the atmosphere. Elevation above sea level - in feet and meter - with barometric and atmospheric pressure - <i>inches mercury, psia, kg/cm<sup>2</sup> and kPa</i>.
Oct 19, 2023 · An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury. Atmospheric pressure drops as altitude increases.
In most circumstances, atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. As elevation increases, there is less overlying atmospheric mass, so atmospheric pressure decreases with increasing elevation.
Atmospheric pressure reduces with altitude for two reasons, both of which are related to gravity. The gravitational attraction* between the earth and air molecules is greater for those molecules nearer to earth than those further away — they have more weight — dragging them closer together and increasing the pressure (force per unit area ...
Oct 19, 2023 · One normal effect of altitude is shortness of breath, since the lungs have to work harder to deliver oxygen to the bloodstream. It can take days and even weeks for a body to adjust to high altitude and low air pressure.
Atmospheric pressure varies with the altitude; since the air mass above a certain surface is smaller as we climb up a mountain, air pressure on mountains is usually lower than air pressure at sea level. We can obtain an expression for the atmospheric pressure as a function of elevation.
