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While the official threshold of space is 100km above the Earth, the effects of the atmosphere can be detected much higher. Even Hubble, which orbits at almost 600km, could be brought down by the creeping effect of drag. Only satellites in orbits several tens of thousands of kilometres above the Earth can be regarded as effectively permanent ...
Apr 14, 2010 · A good rule of thumb is that the higher you go, the shorter you should stay. If you were suddenly transported to the summit of Everest (8848 metres) without acclimatising first, you…
Aug 9, 2012 · For example, how long can you stay awake before you die? How high in altitude can you climb before suffocating? How much acceleration can your body withstand before it rips apart?
High-altitude adaptation in humans is an instance of evolutionary modification in certain human populations, including those of Tibet in Asia, the Andes of the Americas, and Ethiopia in Africa, who have acquired the ability to survive at altitudes above 2,500 meters (8,200 ft). [1]
The medical problems that are direct consequence of high altitude are caused by the low inspired partial pressure of oxygen, which is caused by the reduced atmospheric pressure, and the constant gas fraction of oxygen in atmospheric air over the range in which humans can survive. [1]
Jun 12, 2018 · At sea-level, the partial pressure of oxygen is 159 mmHg, whereas at 8,848m above sea level (the summit of Mt Everest), the partial pressure of oxygen is only 53 mmHg. At high altitudes, oxygen...
Jul 10, 2021 · A wet-bulb temperature of 35 °C, or around 95 °F, is pretty much the absolute limit of human tolerance, says Zach Schlader, a physiologist at Indiana University Bloomington. Above that, your...
