1. Atmospheric pressure is what you assume gravity is, and that thinner air ought to mean you can jump six times as high.
Yet again you present a pathetic strawman.
Atmospheric pressure is CAUSED by gravity, not what gravity is.
Thinner air would mean you are slowed down by the air less, but that is negligible.
Thinner air would also mean that there is less of a buoyant force pushing you up.
Less air would mean a balloon with a rigid skin would fall faster.
In other words, air presses down on us
No. Air presses from all directions.
This includes from below.
And due to the pressure gradient, it pushes more from below than above.
Now where would you get this idea?
By listening to dishonest people like you that need to lie about reality to try to discredit reality to try to pretend your fantasy is real.
Don't forget the Czechoslovak movie Ikarie XB 1. It pictures weightlessness even before they could see from real space footage.
Then why don't you provide a link to a video and include the timestamp of this?
Also, you don't need real space footage to understand weightlessness.
Again, it isn't weightless because it is in space, it is because it is in free fall.
Hold up here. Before something is explored, we already have decided that its thin atmosphere ought to allow high jumping.
No, through an understanding and basic math. Something you seem entirely ignorant of.
And again, the lack of atmosphere has nothing to do with it.
Mount Everest has thin air too.
Which doesn't mean you can jump higher.
but vacuum tests show the opposite.
How?
Or do you just mean they show your strawman is a blatant lie?
Some people at least have brains in their head.
You should try it some time.
But we have plenty of buoyancy tests in areas of higher pressure (water has higher pressure than air).
Buoyancy doesn't rely upon the absolute pressure. It relies upon the pressure gradient.
This pressure gradient is a function of density and gravity.
If you drop a ball in the water, it floats, because the upwards force from the pressure gradient of the water is greater than the downwards force due to gravity.
Unless you are talking about Vomit Comet as an example (which is a factor of momentum not gravity or air pressure)
The Vomit Comet is about free fall, where the craft itself is accelerating down to Earth at a rate equal to that of the people inside due to gravity.
In this, the buoyant force vanishes, because the pressure gradient vanishes.
Buoyancy is active when determining whether something is rising or falling while at rest.
This literally makes no sense.
Just as you can toss a ball up in the air, and it slows then reverses direction, you can toss a ball downward in a pool and it slows and reverses direction
Yes, due to the forces acting on it.
A combination of gravity and buoyancy.
Diffusion. And they don't bunch up as you say. They separate into layers of atmosphere.
Diffusion would mean they separate, not bunch up.
And saying they separate into layers doesn't help you.
The air at sea level is a much greater pressure than at high altitudes.
What magic is maintaining this pressure gradient?
It can't be buoyancy, because the air is the same density as the surroundings.
We can even increase the pressure gradient through other means and see that it doesn't magically get held.
Why can atmosphere at sea level exert enough pressure to crush a steel drum with a vacuum in it.
Clever. Very clever. The vacuum does all the work.
No, the vacuum does nothing.
The air pressure around it does.
If you place the steel drum in a vacuum chamber, and remove the air, the drum is fine.
It is only if you have a large pressure on the outside and far less on the inside does it get crushed, due to the air outside pushing in.
The oxygen would diffuse down to lower levels.
That isn't how diffusion works.
Diffusion goes in all directions, not magically down.
What I think you mean is that you can't maintain that large pressure there because there isn't enough air above pushing down due to gravity.
Again, we know buoyancy is NOT a fundamental force.
We know it is a result of the pressure gradient, which is the result of a downwards force.
All your lies can't change this.
Another fact which destroys your buoyancy fantasy is that you can measure the downwards force, by varying the density of the object and fluid and find that the net downwards force is:
F=g*V*(rho_obj - rho_flu)
i.e. we see that there appears to be 2 forces, one going down based upon the mass, and one going up.
The maximum upwards force we could ever get is from a hypothetical object with 0 mass being immersed in a dense fluid, which is then g*V*rho_flu.
Yet somehow you want us to believe that even though the maximum upwards force it can exert, it can magically exert a much larger force downwards?
e.g. in air, if you have a cube 1 m wide, the maximum upwards force is roughly 12 N.
But the downwards force can be much larger, e.g. if that cube was made out of steel, it would be 77 kN.
HOW?
What allows the air to push down so much more?
Especially when the pressure gradient in the air is pushing upwards?
But another important fact we see is the dependence on g.
If we go around Earth, that force varies.
This makes no sense in your fantasy, but perfect sense for the RE.
Your idea simply doesn't make any sense at all.