Strep throat Strep throat is a throat infection causing symptoms including a red sore throat with white patches. Hay fever Hay fever, an allergic reaction to outdoor pollens and molds, causes nasal congestion, itchy eyes, and more.
Air Density is the mass per unit volume of the air. For example, the standard air density at sea level is 1.225 kg/m 3 (0.076474 pounds/ft 3). Relative Density is the ratio of the actual air density to the standard sea level density, expressed as a percentage.
1 At IUPAC standard temperature and pressure (0 Â°C and 100 kPa), dry air has a density of 1.2754 kg/m3. 2  At 20 Â°C and 101.325 kPa, dry air has a density of 1.2041 kg/m3.  At 70 Â°F and 14.696 psi, dry air has a density of 0.074887lbm/ft3.