Answer :
the air pressure inside and outside is equal, and the pressure inside the eardrum remains constant. At 15 degrees Celsius and sea level, the density of air is approximately 1.225 kilograms per cubic meter (kg/m3).
At a temperature of 273 K and a pressure of 101.325 kPa, dry air has a density of 1.293 kg/m3. The composition of air is basically constant up to an altitude of at least 50 km, with the exception of the variability of water vapor. Finding the air density is a straightforward process. The air pressure must be split into two partial pressures: that of dry air and that of water vapor. These two values when combined result in the desired parameter.
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