THIS IS NOT copy / paste.
I AM writing my own words.
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Inertia:
the word "inertia" comes from Latin and basically describes "inactivity" or "lack of willingness".
So inertia means nothing.
People use that word to say that things don't have their own will.
Things won't change status by themselves. Not speed (whether zero or some other speed), not direction.
so inertia is nothing.
If you leave things standing still, they will stand still all the time, until some force moves them.
Things won't move by themselves.
Again, inertia is nothing.
If you leave things moving, they will keep moving in straight line at same speed all the time,
until some froce changes their direction, or speed. Most of the time what slows and stops them is friction.
The only way something can keep moving constantly is by use of energy, all of the time, not some or most of the time.
There is always friction acting upon any movement, so if inertia is resistance, then we've figured out what inertia is. It's resistance, so no need for inertia. We can simply use resistance.
Things won't change direction or speed by themselves.
Resistance changes direction or speed.
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Gas evacuation:
Gasses are always on some temperature. It means their molecules have energy (speed), they fly in all directions,
bouncing from one another and from chamber walls.
So how and why does a gas ignite if their molecules are just randomly bouncing about?
Outside air molecules do the same.
What's in between the random bouncing molecules?
Water will freeze at 32 Fahrenheits.
Air needs much lower temperature even to become liquid, not to menton freeze.
Even in water all molecules move all the time.
Are the molecules in water just randomly bouncing about? And are they tightly packed with no free space?
If you open chamber door, outside molecules near door will push inner molecules inside, and some will enter with them.
I'd like you to explain this a bit more just so I'm clear on what you actually mean.
Other molecules from inside will push other outer molecules out and some will exit with them.
Some molecules will get bounced back in, some back out, and some will exchange,
but number of molecules inside will basically not change.
(Give or take couple of molecules, but soon others will replace them.)
A little bit more explanation for this if you don't mind. Basically let me know if your chamber is evacuating or so called evacuated or at equal pressure or at a higher sort of temp. You know, stuff like that. Just so I know what page you're on.
It is crowd in and out and at the door.
Add this in for further explanation.
When you close door, inner molecules bounce inside, outer bounce outside.
You have air pressure inside, and air pressure outside.
Can you explain what you mean by bounce? I mean, do they randomly bounce with free space between them and if so, what makes them bounce?
If you say temperature, the explain how and why this temperature comes about in respect to the bouncing molecules.
Atmospheric pressure is there because bunch of molecules hit walls of chamber, creating force that pushes on those walls.
Molecules also push manometer that measures how big pressure is.
So a random amount of molecules just hit a wall and they push the wall? I assume there's free space behind those molecules, so they're basically of their own free movement. If not then explain what's happening.
When pump starts working, it grabs portion of air from inside and pushes out.
(Same as helicopter propeller pushes air down.)
No it doesn't. How can a pump grab a portion of air from inside of a chamber when the pump is not in that chamber?
It cannot suck air out because there's no such thing as suck in reality. It's all push, so therefore the pump can only push.
Seeing as the pump is external to the chamber then we can see that it does nothing in that chamber, so all of the work and energy applied is working externally. It's pushing atmosphere away from the chamber and allowing a lower pressure to ensue due to it compressing the external atmosphere back to allow the once equalised atmosphere inside the chamber to expand and push on push out of it.
Have a serious think about this because it will ultimately help you understand a hell of a lot and also allow you to see how you've been lied to.
Other molecules inside get more room to bounce in longer segments.
Pressing in inside crowd gets lower. Air pressure inside reduces.
Outside is still crowdy.
Without pump, molecules from outside would try to get back in, like in any crowd.
You see, you do have a small grip on this but you just use it the wrong way. Keep looking at my post above and absorb it.
Molecules inside keep bouncing, some get to pump, then pump grabs them and throw them out.
More and more molecules get thrown out, and crowd inside reduces.
Less and less moecules inside hit walls and manometer,
and air pressure inside is smaller and smaller.
Grabs them?
It doesn't matter about this bit. Just look at the post 2 posts back to see what's happening.
Well, last few molecules would take too much time to bounce to pump, but it is too few of them,
and inside the chamber we have almost pure vacuum.
Difference between that and ideal theoretical vacuum is small.
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I hope this will help.
I'm really sorry if it didn't.
Too much time to bounce? And to think, you've got these molecules just bouncing around randomly with so much empty space and yet you don't tell me what's causing these molecules to simply bounce about?