Anonymous asked in Science & MathematicsAstronomy & Space · 8 years ago

What is the lowest air pressure a person can survive in?

The Armstrong limit is 0.06 bar. Lets say we land on another world and its atmosphere is 0.10 bar and we have oxygen masks to breath but without a pressure suite. Wouldn't our saliva evaporate before boiling?

1 Answer

  • Paula
    Lv 7
    8 years ago
    Favorite Answer

    The Armstrong limit, often called Armstrong's line, is the altitude that produces an atmospheric pressure so low (0.0618 atmosphere or 6.3 kPa (1.9 inHg)) that water boils at the normal temperature of the human body: 37 °C (98.6 °F).

    At or below that pressure death occurs quickly because all moisture in the mouth, airways and lungs boils, and the tissue dries out and dies.

    And near that pressure there would certainly be a greater than normal tendency for all that fluid to evaporate.

    It is of academic interest because there is zero liklyhood of anyone reaching such a worold in under 10,000 years. It would require very major advances in propulsion systems and life support systems before we can travel to other star systems.

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