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.
Many experience. this decrease in density as the âpoppingâ of the ears while flying. This. decrease in density is due to molecules positioning themselves farther. apart. Our atmosphere contains different types of gases; about 78% of the. atmosphere is nitrogen, 21% is oxygen and 1% are various other gases.