Coin said:
jbryan10 said:
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So you are somewhat correct, gas pressure cannot exist adjacent to a vacuum. If our atmosphere was 14 psi all the way up, it certainly would expand into that vacuum. But that is kinda what it did at creation (I disagree). The only thing holding it all together is gravity (which I acknowledge you don't believe in).
What force is greater, gravity or the vacuum of space? I mean measurably stronger.
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Objects fall due to density, no gravity needed. Gravity is an unproven theory necessary only in astrophysics, which is entirely theoretical.
There is also no logic here. Density is meaningless without gravitational forces. Without gravity, there is no driving force to move a more dense object or fluid through/under a less dense object or fluid. It moves because it weighs more. It weighs anything because of gravity...
I'm no expert, but my basic understanding is electromagnetic acceleration is the force drawing us downward, but to equate this to a force that draws objects in space together is quite a leap of logic. Especially, when it can not be replicated in any test here on earth. Density explains why materials stack in a column. For example, I jump off a cliff and fall, then land in a lake and float. Electromagnetic acceleration draws me to the negative ground (sky is positive). Density variant then overcomes the acceleration.
Think about this hypothetical. We have a container that is just as tall as out atmosphere. We then connect a vacuum to the top end of it, a vacuum more powerful than we can replicate. Then we turn it on and begin drawing out the air in the container, which at Ultra-High Vacuum+ would happen instantaneously. Are you telling me that vacuum is going to leave a dense lawyer of breathable air at the bottom?
Well, since vacuum is not a force, gravity is the stronger force. The "force" of a vacuum is coming from the pressurized source.
Sounds like you are simply redefining (incorrectly) gravity as electromagnetic acceleration. So earth is negative and sky is positive. If you hold a magnet with it's negative pole pointed to the sky, why does it not fly out of your hand into the sky? Since you're now applying a positive/negative charge to everything in existence, the same experiment would apply to any object. Since monopoles do not exist, in your electromagnetic world, anything you flip over would fly.
Where does the sky begin and end?
In your hypothetical, with your infinitely powerful vacuum (which again, isn't something applying a net force. It is just space for something else to expand into, but I'll play along):
1) if everything go sucked out, why would it happen instantaneously? Nothing happens instantaneously. Blow a hole in the ISS and all the air doesn't instantly disappear. It expands over time into space. Since you don't believe in those things, I'll use a practical earthly example. In a 30,000 psi pressure vessel, If I open a valve on top, the pressure in the vessel isn't instantly atmospheric. If in a more extreme example, the vessel wall fails and completely tears apart. The air inside still expands over time, not instantaneously. That is when chunks of the vessel go flying through the roof and into the parking lot a few building over. The gas previously contained in the vessel expands as it is escaping to atmosphere.
2) Since gravity (or in your case electromagnetism) exists, yes. There would still be something at the bottom of the container, being held by the interaction of its density with gravity (or the negative charge of the earth).