I have a question (for the astronomers/astrophysicists, as well as biologists out there). Gravity affects density. That can be seen only (?) on the large scale (neutron stars, pulsars, black holes etc). This affect is brought about through pressure.
Following this train of thought, if someone removed gravity from the equation, there would still be pressure acting. Which means that pressure is indirectly related to gravity and density.
Also, it is known that as one reaches higher altitude, the air pressure gets weaker, meaning that at in orbit it is practically zero (or very close to, hence microgravity). This being said, what is the O2 density in an orbiting shuttle or the ISS? Is it lesser than 1 ATM?
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Lukian tell me, do you have other jerks like magicwatch in this group?
VineetHonkan
Level 7
Apr 16, 2019
0
Personal attacks serve religions well. They do not serve science.
If gravity did not existed then, molecularly, matter would not coalesce together. Without gravity stars would not ignite (there would be no pressure).
As for the ISS question: Cabin pressure nominal range: T = 14.2 to 14.9 psi (1 ATM = 14.7psi) (the pressure is maintained artificially)
ref: [wsn.spaceflight.esa.int]
Lukian
Level 8
Apr 8, 2019
1
...ok, with that bit of information, and noting that people float around inside these vehicles due to microgravity, wouldn't they be gasping for air as I'm sure the pressure/density is not the same as on Earth?
@VineetHonkan Like an airplane, the ISS is a pressurized sealed container.
Microgravity is an illusion. There is a sizeable amount of gravity pulling the ISS towards the earth but since it's in orbit, the ISS is continually falling towards the horizon of the planet. In physics, all objects inside a falling box fall at the same rate i.e. they feel no gravity i.e. weightless.
@VineetHonkan go back to school and learn something , or were you home taught ?
@VineetHonkan maybe this will answer your question: According to the specs (last page of link above) the Cabin air velocity: 10 to 40 feet per minute which means the air in the ISS is in constant movement (even breathing causes air currents).
@magicwatch Please, there is no stupid question. We are all here to learn. What is logical to one is not to another.
@Lukian point taken . apologies
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