Assertion: ambient air pressure | /r/CapableOf | fall to about 0.2 bar
Facets:
value: at 40,000 feet
type: LOCATION
Source sentences:
text: At 40,000 feet (12,000 m), the ambient air pressure falls to about 0.2 bar, at which maintaining a minimum partial pressure of oxygen of 0.2 bar requires breathing 100% oxygen using an oxygen mask.