70
Yes
The 'Queen of the Hills' is 7000 feet above sea level
East of Zhangjiakou Nearly 7000 feet (2130 meters)
I don't see why not.Denver is at 5000 feet and Laramie Wyoming is at 7000 feet but Idon't remember seeing any birds or trees for that mater
No. It changes negligably from the standard ~21% regardless of elevation. (at any elevation you can survive at anyway) :p The actual amount of available oxygen does change, due to a decrease in atmospheric density as elevation increases. For example: at 17,700ft (apparently a common Mt. Everest base camp) the air density is approximately 51% of the density at sea level. So you COULD express it as 51% of ~21%, which would be about 10.71%.
7000 feet = 1.32575758 miles
There are 22,965.87927 feet in 7000 metres.
There are 5280 feet in one mile. Therefore, 7000 feet is equal to 7000 / 5280 = 1.3257 recurring (that is, 1.32575757..) miles.
The person living in Denver (5280 feet elevation) would likely have higher hemoglobin levels compared to the person living in Philadelphia (39 feet elevation). This is because at higher elevations, the air has lower oxygen concentration, prompting the body to produce more red blood cells and hemoglobin to compensate for the lower oxygen availability.
According to the National Park Service (www.nps.gov/grca/grandcanton/south-rim/), the elevation on the South Rim of the Grand Canyon averages about 7000 feet (2100 meters). The North Rim is about 1000 feet (300 meters) higher.
Standard oxygen concentration for earth's atmosphere is 20.9% Theoretically, this percentage does not change at varying altitudes. What changes is the density of the oxygen (and other gases, such as nitrogen) present in the air. At sea level or on a mountain top, oxygen concentration is 20.9% However, depending on things like air pollution and location (indoors vs. outdoors), O2 concentration can vary widely, down to as little as 10% in polluted indoor environments.
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