In the film 2001: A Space Odyssey astronaut Dave Bowman is trapped outside the ship without a helmut. He blows the electric charges on the pod door which propels him into the open air lock of the main ship. The air lock is open to the vacuum of space and has no oxygen. Bowman holds his breath until he can close the...
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answers:
Logan say: Space is a vacuum. It would be like everything is sucking you apart, you wouldn't be able to hold your breath because the air would be sucked out of you so fast, and that would create extremely cold temperatures and make your blood vessels freeze.
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Athena say: Actually, yes, though NOT holding air in your lungs is better.
And for a limited time of course.
But we are talking about minutes.
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Newdivide1701 say: You would not explode if you are exposed to a vacuum. That's been debunked many, many times. If you could explode, then you would also be crushed if you only go down 10 metres under water since the pressure is at 2 atmospheric pressures, and a free diver can go as far as 102 metres based on this site:
http://www.teara.govt.nz/en/diagram/6175...
And most underwater swimmers goes as far down as 10 metres, 2 atms.
Now holding your breath until the last possible instant might help oxygenate your blood a bit, but once you're in a vacuum, you will experience extreme pressure to exhale since now your body is putting -- say twice the amount of pressure to keep the air in.
According to Google when asking the question, "consciousness without oxygen", it says under "How long can you survive in space?"
At most, an astronaut without a suit would last about 15 seconds before losing conciousness from lack of oxygen. (That's how long it would take the body to use up the oxygen left in the blood.) Of course, on Earth, you could hold your breath for several minutes without passing out.