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The density of air or atmospheric density, denoted ρ, is the mass per unit volume of Earth's atmosphere. Air density, like air pressure, decreases with...

calculating density Densities of the elements (data page) List of elements by density Air density Area density Bulk density Buoyancy Charge density Density prediction...

The density altitude is the altitude relative to standard atmospheric conditions at which the air density would be equal to the indicated air density at...

or 39.2 °F); for gases, the reference is air at room temperature (20 °C or 68 °F). The term "relative density" (abbreviated r.d. or RD) is preferred in...

the indicated air density at the place of observation, or, in other words, the height when measured in terms of the density of the air rather than the...

correct fuel mass to the engine. Air changes its density with temperature and pressure. In automotive applications, air density varies with the ambient temperature...

when the air is humid. The relative concentration of gases remains constant until about 10,000 m (33,000 ft). In general, air pressure and density decrease...

This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes...

ideal gas law, moist air will have a lower density than dry air. At max. saturation (i. e. rel. humidity = 100% at 0 °C) the density will go down to 28...

by aircraft, supercharging was often used to compensate for the lower air density at high altitudes. Supercharging is less commonly used in the 21st century...

Dual Air Density Explorer was a set of 2 satellites, DADE-A and DADE-B, released as part of NASA's Explorer program. DADE-A and DADE-B was launched on...

A lifting gas or lighter-than-air gas is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful...

electronic control unit (ECU). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required...

air density due to high ambient temperature and high airport elevation. Air density decreases with increasing temperature and altitude. The lower air...

hence air density variations, where air velocity changes. An example: the speed of the jet stream is not constant along its length; additionally air temperature...

in the U.S., vapour density is defined with respect to air, not hydrogen. Air is given a vapour density of one. For this use, air has a molecular weight...

heated air inside the envelope makes it buoyant, since it has a lower density than the colder air outside the envelope. As with all aircraft, hot air balloons...

for installation error, instrument error, or the actual encountered air density, being instead calibrated to always reflect the adiabatic compressible...

lean-burn. For precise air–fuel ratio calculations, the oxygen content of combustion air should be specified because of different air density due to different...

fuels where in practice air would only be drawn in locally to the burner. This explains the apparently lower energy density of materials that contain...