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Apple Sky

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If it is all dependent on density, how do you explain a feather and a bowling ball falling at exactly the same speed in a vacuum?

In a vacuum yes but the earth is not in a vacuum.
 
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Apple Sky

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I believe the term your meme is looking for is "bouyancy". The trouble with your meme is that bouyancy only works if gravity exists.

Your only going by Newton's Law.
 
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David Lamb

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:) And fall.

I'm a great believer that gravity doesn't cause water to stick to a ball.
No, not "and fall", because the words of mine that you quoted were in the context of things like helium and hydrogen, which are less dense than air. Here are the words you quoted, in context:

"That is not generally true. Indeed, it is only true with things that are less dense than air, things like hydrogen and helium. Such things are the only things that rise because of density."

Helium and hydrogen don't fall, because they are less dense than air.

As for water "sticking to" a ball, water no more sticks to the earth than you and I do. Gravity keeps water, and you and me, from floating off the earth, but we can still jump, and waves can still rise on the sea, so neither the water nor human beings are stuck to the earth.
 
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Gene2memE

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In a vacuum yes but the earth is not in a vacuum.

That's immaterial though (surely you can understand that?). Both are ocurring ON Earth.

If 'density' causes a rock to fall to Earth, and a helium-filled ballon to rise, then why when atmosphere is removed does the rock still fall (at a (nearly) identical rate), while the balloon now falls as well? And why does the rock and balloon fall at identical rates?

Why would removing atmosphere affect the 'density' of a balloon, but not a rock?

Secondly, why does density matter at all?
Why should density cause any object to move in any direction?
Why doesnt the rock move sideways, or up, or stay on the spot?
Can you identify the force that is producing the movement on the rock and the balloon?
 
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Apple Sky

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Why would removing atmosphere affect the 'density' of a balloon, but not a rock?

Because we don't live in a Vacuum, therefore the rock drops & the balloon rises due to their density. They will never fall at the same rate or a feather or a cardboard box. The best way to see this this is to look at a submarine.
 
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Apple Sky

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why is the pressure from water greater the deeper someone dives?

Because water is heavy. The deeper you go the more water is on top of you aka the immense pressure is from the water.
 
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Hentenza

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But a rock does. b/c it's more dense.
You need to stop listening to the non scientific explanations and find out what the terms actually mean and what they do.

Gravity is a fundamental force of attraction between any two masses. On Earth, it gives objects weight, pulling them toward the planet's center.

Density is the concentration of matter in a given space. Mathematically, it is defined as mass divided by volume.

Gravity pulls on all objects at the same rate of acceleration regardless of what they are made of.

An object with high density (like an iron ball) packs a lot of mass into a small size. An object with low density (like a styrofoam ball) has very little mass for its size.

In other words Gravity is a force (measured in Newtons) that dictates movement and it does not change based on an object's composition, only its mass while density is a property of matter, not a force. It cannot pull an object anywhere on its own.
 
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Hentenza

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Because we don't live in a Vacuum, therefore the rock drops & the balloon rises due to their density. They will never fall at the same rate or a feather or a cardboard box. The best way to see this this is to look at a submarine.
Buoyancy is a different force. Buoyancy exists because fluid pressure increases with depth. The pressure pushing up on the bottom of an immersed object is greater than the pressure pushing down on the top which creates a net upward force (the buoyant force) that opposes gravity.

In positive buoyancy an object weighs less than the fluid it displaces so the object floats. In negative buoyancy an object weighs more than the fluid it displaces so the object sinks. In neutral buoyancy an object weighs exactly the same as the displaced fluid so it neither floats nor sinks but hovers in place.
 
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prodromos

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Because we don't live in a Vacuum, therefore the rock drops & the balloon rises due to their density. They will never fall at the same rate or a feather or a cardboard box. The best way to see this this is to look at a submarine.
I suspect the submarine will fall more like a rock than a feather in the atmosphere.
 
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prodromos

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@RedLetterJoe , still waiting for your demonstration of how flights between Sydney and Santiago are shorter than flights between Sydney and Los Angeles on an annotated flat earth map of your choice.
Or you can admit through your silence that these regular flights are not in any way possible on a flat earth and thus concede that the Earth is, in fact, a globe.
 
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Gene2memE

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Because we don't live in a Vacuum,

Again, that's immaterial

therefore the rock drops & the balloon rises due to their density.

What force causes the rock to fall and the balloon to rise? What is acting on them to overcome their inertia?

Density is not a force. It is a description of how tightly packed matter is in a given object/area.

They will never fall at the same rate or a feather or a cardboard box.

Except, they do. When in a vacuum, all of these objects - with wildly differing densities - will fall at the same rate.

And, they will never rise.

The best way to see this this is to look at a submarine.

??


This is what is f a s c i n a t i n g about flat earth. The further one goes into it, the more one has to inhabit an alternate reality.

One has to reject everything from simple observational evidence through to experiments repeated for the last 2,250 years all the way up rejecting the existence of one of the four fundamental forces of the universe.
 
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Apple Sky

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Gravity pulls on all objects at the same rate of acceleration regardless of what they are made of.

So an Iron ball falls at the same rate as feather ? How strange!
 
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Apple Sky

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Except, they do. When in a vacuum, all of these objects - with wildly differing densities - will fall at the same rate.

But like I said, 'We don;t live in a vacuum.'
 
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Apple Sky

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:sigh:
It is sad to see you making these posts without any understanding of what you are posting.

All's I know is that water always finds it's own level & will never ever stick to a ball earth. If gravity is this strong, how come birds fly ? By rights they should be stuck to the ground like us. For birds to fly they would need a lot of power with this force of gravity.
 
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