what is the density of air?

Answer 1

about 1.29 kg/m3

Answer 2

The density of air, ρ is the mass per unit volume of Earth's atmosphere, and is a useful value in aeronautics. In the SI system it is measured as the number of kilograms of air in a cubic meter (kg/m3). At sea level and at 20 °C dry air has a density of approximately 1.2 kg/m3. varying with pressure and temperature. Air density and air pressure decrease with increasing altitude.

Answer 3

The density of air, ρ (Greek: rho) (air density), is the mass per unit volume of Earth's atmosphere, and is a useful value in aeronautics. In the SI system it is measured as the number of kilograms of air in a cubic meter (kg/m3). At sea level and at 20 °C dry air has a density of approximately 1.2 kg/m3. varying with pressure and temperature. Air density and air pressure decrease with increasing altitude.

where ρ is the air density, p is pressure, R is the specific gas constant, and T is temperature in kelvins.

Therefore:

At standard temperature and pressure (0 °C and 101.325 kPa), dry air has a density of ρSTP = 1.293 g/L.
At standard ambient temperature and pressure (25 °C and 100 kPa), dry air has a density of ρSATP = 1.168 g/L.
At standard ambient temperature and pressure (70 °F and 14.696 psia), dry air has a density of ρSATP = 0.075 lbm/ft3.

Answer 4

At sea level and at 20 °C dry air has a density of approximately 1.2 kg/m3. varying with pressure and temperature.

At standard temperature and pressure (0 °C and 101.325 kPa), dry air has a density of ρSTP = 1.293 g/L.

At standard ambient temperature and pressure (25 °C and 100 kPa), dry air has a density of ρSATP = 1.168 g/L.

At standard ambient temperature and pressure (70 °F and 14.696 psia), dry air has a density of ρSATP = 0.075 lbm/ft3.

Answer 5

About 14.7 p/s/i at sea level.

Answer 6

0.08 lbs/ft³ : 1.2 kg/m³