air density
Mass per volume
Air density is the mass of air per unit volume, typically measured in kilograms per cubic meter.
It varies with temperature, pressure, and humidity—warm air is less dense than cold air, which is why hot air balloons rise.
Air density affects aircraft performance, engine combustion, and how far a baseball travels: The ball carries better in Denver's thin air.
- troposphereLowest atmospheric layer
- altitudeMeasured height above reference
- high altitudeGreat distance upward
- sea levelElevation reference point
- aerodynamicsPhysics of air motion
pressure · barometric pressure · buoyancy · humidity · rarefied · mass · cubic meter · compressibility · temperature · volume · drag force · hypoxia · breathing difficulty · mountain climbing · drag · fluid dynamics · viscosity · molar mass