Ultimately, a perfect vacuum isn't possible because quantum theory dictates that energy fluctuations known as 'virtual particles' are constantly popping in and out of existence, even in 'empty' space.
Practically, it is impossible to make a perfect vacuum. A perfect vacuum is defined as a region in space without any particles. The problem is that to maintain a vacuum in a region you have to shield it from the environment. It is not difficult to make a container that would prevent atoms from entering the region.
There is no such thing as truly empty space. If we tried to suck all the particles out of a certain volume, we could still never get it empty. There would still be things like vacuum fluctuations, gravity, and dark matter, which can't be sucked out.
A perfect vacuum would be empty space with no atoms or any particles in it. But there is no such thing because virtual particles are always popping in and out of existence. Even "empty space" is seething with virtual particles. Virtual particles aren't real.
The other way is to measure in "Hg absolute ("HgA), which is a gauge with a reversed scale. In this case, the scale on the gauge reads 29.92" Hg at atmospheric pressure and 0" Hg would be perfect vacuum. Please note that a perfect vacuum is not possible on earth, no matter which vacuum pump is used.
"No human can survive this — death is likely in less than two minutes," Lehnhardt said. According to NASA's bioastronautics data book (opens in new tab), the vacuum of space would also pull air out of your lungs, causing you to suffocate within minutes.
For water at standard atmospheric pressure, if you were to manage to create a perfect vacuum, it would go (spoiler alert) about 10.3 m up the straw.
Ultimately, a perfect vacuum isn't possible because quantum theory dictates that energy fluctuations known as 'virtual particles' are constantly popping in and out of existence, even in 'empty' space.
After about one minute circulation effectively stops. The lack of oxygen to the brain renders you unconscious in less than 15 seconds, eventually killing you.
Physicists acknowledge they can never reach the coldest conceivable temperature, known as absolute zero and long ago calculated to be minus 459.67°F.
In conclusion, we can say that an electric field can exist in a vacuum.
The best vacuum ever constructed on Earth was done at CERN at reported to achieve a density of about 1000 atoms per cubic centimeter. While this is astonishingly low, it is still over 2 million times more dense than interstellar space!
In space we can assume that there would be no external organisms such as insects and fungi to break down the body, but we still carry plenty of bacteria with us. Left unchecked, these would rapidly multiply and cause putrefaction of a corpse on board the shuttle or the ISS.
A total of 18 people have lost their lives either while in space or in preparation for a space mission, in four separate incidents. Given the risks involved in space flight, this number is surprisingly … low. The two worst disasters both involved NASA's space shuttle.
First, the good news: Your blood won't boil. On Earth, liquids boil at a lower temperature when there's less atmospheric pressure; outer space is a vacuum, with no pressure at all; hence the blood boiling idea.
Yes, gravity does exist in a vacuum. A vacuum does not need to be completely devoid of matter, it just needs to have a lower pressure than the area around it.
Absolute pressure is measured relative to perfect vacuum (0 psia) with zero as its zero point.
A normal person is capable of a breath pressure of 1-2 psi, so by pressure breathing you can increase your lung pressure from 10.1 psi to 11.1-12.1 psi during each exhale, closer to the 14.7 psi you are used to.
You can sort of create one with your palms if you happen to have soft palms. Having sweaty palms makes it even easier. Squeezing and wiggling the palms, create a small vacuum and when you release the air it sounds like a fart (but doesn't smell though).
Astronaut Thomas Jones said it "carries a distinct odor of ozone, a faint acrid smell…a little like gunpowder, sulfurous." Tony Antonelli, another space-walker, said space "definitely has a smell that's different than anything else." A gentleman named Don Pettit was a bit more verbose on the topic: "Each time, when I ...
There's a limit to how much of the universe we can see. The observable universe is finite in that it hasn't existed forever. It extends 46 billion light years in every direction from us. (While our universe is 13.8 billion years old, the observable universe reaches further since the universe is expanding).
What is a tardigrade? Tardigrades are microscopic eight-legged animals that have been to outer space and would likely survive the apocalypse. Bonus: They look like adorable miniature bears. Around 1,300 species of tardigrades are found worldwide.
But contrary to popular myth, a black hole is not a cosmic vacuum cleaner. If our Sun was suddenly replaced with a black hole of the same mass, Earth's orbit around the Sun would be unchanged. Of course, Earth's temperature would change, and there would be no solar wind or solar magnetic storms affecting us.