21%
2.66666666667 is the decimal of oxygen in the air
the aircontains 20.93% oxygen-whether you are swimming in the Dead Sea in Israel (1,369 feet or 417 meters below sea level) or standing on top of Mount Everest in Nepal (29,035 feet or 8,850 meters above sea level). the barometric pressure is lower the higher in altitude you go so the pressure of oxygen is lower therefore its harder for your lungs to absorb the oxygen.
The percentage of oxygen in the atmosphere does not change with altitude, so it is about 21% at 10 000 feet. What does change is the pressure. This declines with altitude. At sea level the air pressure is about 101 kPa (kilopascals). Oxygen accounts for 21% of this so the oxygen pressure is 19.6 kPa. This means that there are less oxygen molecules in the same volume of air at higher altitudes. At 10000 feet the oxygen pressure drops to 7.2 kPa, which is roughly one third of the pressure at sea level. For an online calculator of oxygen levels at different altitudes see: http://www.altitude.org/calculators/oxygencalculator/oxygencalculator.htm This site also lets you convert between kilopascals and mm Hg. For further information about the effects of altitude see: http://anthro.palomar.edu/adapt/adapt_3.htm http://www.bmj.com/cgi/content/full/317/7165/1063
1.21kg/m3 at 20 deg C at sea level 1.16kg/m3 at at 30 deg C
The earth's atmosphere at sea level.
The oxygen content of air at any altitude is always about 21%
2.66666666667 is the decimal of oxygen in the air
The average air pressure at sea level is around 101.3 kilopascals (kPa).
Sea level oxygen is around 21% and Denver has about 18% available oxygen.
2
At 7200 feet, the oxygen level is lower compared to sea level because the air pressure is reduced at higher altitudes. This decrease in oxygen level can lead to symptoms of hypoxia such as shortness of breath, fatigue, and dizziness.
well.logically it just makes sense that since there is less oxygen above sea level (mt Everest roughly 1/3 of the oxygen at sea level) that there would be more oxygen below sea level. note: this is completely hypothetical and has no scientific backing whatsoever
22% oxygen at sea level
The average air pressure at sea level is around 1013.25 millibars or 29.92 inches of mercury.
At the summit of Mount Everest there is approximately 33% of the oxygen that is available at sea level.
The partial pressure of oxygen in Denver is lower than at sea level due to the higher elevation. On average, it is around 20-21% lower than at sea level, which means the partial pressure of oxygen in Denver is approximately 16-17 kPa (kilopascals).
At 20,000 feet above sea level, the air is thin and lacks sufficient oxygen for normal breathing. Without supplemental oxygen, it becomes difficult to breathe at this altitude.