I hope nobody lights a match with 100% oxygen. Won't they also get an oxygen intoxication?
Your lungs don't magically get smaller. It just requires more effort from your muscles to fill them with the same gas pressure inside them as you would have at sea level. The air want's to make the pressure the same, inside and outside. Less pressure outside means you can't have as much inside without more effort, if that makes any sense?the lung volume is decreased.
iirc at 20% atmospheric pressure, fire burns the same in pure oxygen as it does in normal atmosphere.I hope nobody lights a match with 100% oxygen.
That's the bit I don't get, like, if you breathe in the same amount, thus expanding your lungs the same amount, the volume within must remain the same? In order to achieve the same pressure(which at sea level the gas pressure of oxygen is ~20% atmospheric pressure), at higher altitude you would need to exert more force.When I mean lung volume decreases I mean the volume of inhaled air decreases.