Partial pressure of the gases you breathe is what matters though, that's why astronauts could breathe pure oxygen for days during the Mercury/Gemini/Apollo missions and be fine (as long as there's no fire :/ ).
Beryl
joined 2 years ago
There are 850k people living in La Paz, Bolivia (elevation 3650m) with the equivalent of 13.2% sea level oxygen and they seem to be doing just fine. And granted, the natives of the region display some hemoglobin adaptation, but still... Even Aspen, Colorado sits at about 15% sea level oxygen and I'm pretty sure people don't wear breathing gear while skiing there.
There are 850k people living in La Paz, Bolivia with the equivalent of 13.2% sea level oxygen and they seem to be doing just fine.
Le nombre de fois où ils ont déjà tenté de passer le même type de loi à la con, et toujours avec la même justification foireuse de protéger les enfants...
Les failles de sécurité qui ne marchent que pour les ''gentils'' ça n'existe pas nondidju!
Well, this is a post about flashlights, a growing number are using them. And since a type-c charging port is more and common on this type of devices, you don't need to worry too much about how to top them up (though they fit in a bog standard Lii-500 just fine). Anyway i'm not contesting the ubiquity of 18650, I'm just saying 21700 might be the future.
Sure, but 21700 is a superior format. It's barely larger than 18650 but thanks to the square-cube law, the stored energy is significantly higher. 18650 is usually around 3500mAh, whereas 21700 is more like 5000mAh.
An even realler lamp uses 21700 batteries
"Éric tient plus que tout à son statut de questeur à l’Assemblée nationale, glisse-t-il. Il veut conserver son maître d’hôtel, son cuisinier, son chauffeur. On ne peut pas le comprendre si on ne garde pas ces choses-là en tête !"
This guy could suddenly rupture a brain aneurysm and you wouldn't even be able to tell the difference.
I had always assumed they just compensated with oxygen pressure to match atmospheric partial oxygen pressure, but I checked and indeed you're right, but it was only that high an oxgen pressure for testing purposes on the ground. Once in flight, they would have dropped it to 5 PSI. It also makes sense as to why that Apollo 1 fire was so violent. Thanks for that learning opportunity ! :)