So I was in the shower today...

[Zack]

If you think division with 0 is valid [and infinite]:
When graphing y=1/x
For x<0 and growing towards 0, y grows to negative infinity.
For x>0 and shrinking(?) towards 0, y grows to positive infinity.
Would y, for x=0, be positively or negatively infinite?

It would be both: Y would exist on all possible points of the Y axis, from 0 to positive infinity, and from 0 to negative infinity.

Please, let's not debate this any further. It's not worth my time. Let's just assume that when someone's talking about infinite energy that they mean a really big number.

100% wrong. The curve never intersects the Y axis, and it certainly doesn't at Y=0!
It just doesn't make sense to say that the x or y axis is intersected "at infinity." Infinity is the concept of a never-ending number, so it can never be reached.

[EDIT]LooseCaboose, here's another violation involved with division by zero. n/n=1, so if n=0, n/n=1. But 0/n always equals 0, so...n=1 or n=0. Of course it should be corrected to n/n=1, n≠0.

Wrong. He was talking about a line, not a curve. And I never said Y intersected at infinity. A vertical line at x=0 intersects Y everywhere.

No. red_Marvin was talking about y=1/x, WHICH IS A CURVE, and he asked what y would be for x=0: negative or positive infinity? Then you said "t would be both: Y would exist on all possible points of the Y axis, from 0 to positive infinity, and from 0 to negative infinity." Which is incorrect. The curve would never intersect Y, ever, and certainly not at Y=0. Just look at the graph.

[Radical Raccoon]

I know what I said. My statement was valid for the argument I was making. Calling it wrong because you are comparing it to another formula is just stupid. You already pointed out my mistake with "y=1/x is a curve." No need to go further.

[anarky]

Pressure in this sense is CAUSED by gravity. You may notice that vibrations don't tend to pass through liquids very well,. as the liquid absorbs it. Very dense solids of such size/mass as the core probably wouldn't vibrate either. Why not go watch "The Core" again and tell me how accurate you think it is. The outer core may not be dense, but more like a vapour of superheated gases eminating from the core due to possible fusion/fission reactions. So why doesn't the mantle and crust fall into the centre through the vapour? Perhaos it is at a very slow rate? My theory is that the outer layers of the earth are in ORBIT around the inner core, with a buffer of superheated gas vapour between them.

The movement causes a centrifugeal force upon the outsides of the planet. Well, why aren't we being thrown off at 1000km/h? Gravity. Stop the earth spinning and you lose the centrifuge... gravity seems that much stronger.

I wonder if astrophysicists have accounted for this too?

[red_Marvin]

Maybe I used wrong terminology.
What I meant was:

y=1/x
If x goes from -infinity towards 0 y goes frome very small to at least almost negative infinity.
The rate of growth (acceleration) of suggests that x/0 would be -infinity

The same goes for x>0 but the other way

I never said that x would actually reach 0 but move towards it.

Can you have a group of apples and divide it into zero groups?

[anarky]

Eat it?

[Zack]

Pressure in this sense is CAUSED by gravity. You may notice that vibrations don't tend to pass through liquids very well,. as the liquid absorbs it. Very dense solids of such size/mass as the core probably wouldn't vibrate either. Why not go watch "The Core" again and tell me how accurate you think it is. The outer core may not be dense, but more like a vapour of superheated gases eminating from the core due to possible fusion/fission reactions. So why doesn't the mantle and crust fall into the centre through the vapour? Perhaos it is at a very slow rate? My theory is that the outer layers of the earth are in ORBIT around the inner core, with a buffer of superheated gas vapour between them.

The movement causes a centrifugeal force upon the outsides of the planet. Well, why aren't we being thrown off at 1000km/h? Gravity. Stop the earth spinning and you lose the centrifuge... gravity seems that much stronger.

I wonder if astrophysicists have accounted for this too?

Oh yes.
Take a look at pulsars. They are spinning so fast, and these objects have small dimensions, that it tells you something about how dense they must be not to be torn apart by centrifugal forces.

[Agamemnus]

there is still a massive amount of matter being pulling towards the center, thus creating pressure.

It's not being pulled towards the center. It's being pulled towards somewhere outside the center, but not in the center.

Wrong. It is being pulled towards the center, but it is being pulled by matter outside the center, as my post stated.

OK, well, it might be pulled towards the center by gravity, but some other forces could be stronger than the relatively smaller force of gravity in the center than this pulling is offset by something else... like magnetism.

Just because everything is moving towards the center doesn't mean there is more pressure at the center than anywhere else

Yes it does. Tons and tons of matter is constantly moving towards the center. It doesn't have to move fast to create more pressure: it's the weight and not the speed. Lay down and have someone softly lay an anvil on your chest. Are you not going to feel its pressure pushing down on you?

Weight is determined by mass multiplied by force of gravity, not mass alone. If you lay an anvil on me in space, I won't feel any pressure, because there is almost no gravity.


ANARKY:

Pressure in this sense is CAUSED by gravity. You may notice that vibrations don't tend to pass through liquids very well,. as the liquid absorbs it. Very dense solids of such size/mass as the core probably wouldn't vibrate either. Why not go watch "The Core" again and tell me how accurate you think it is. The outer core may not be dense, but more like a vapour of superheated gases eminating from the core due to possible fusion/fission reactions. So why doesn't the mantle and crust fall into the centre through the vapour? Perhaos it is at a very slow rate? My theory is that the outer layers of the earth are in ORBIT around the inner core, with a buffer of superheated gas vapour between them.

The movement causes a centrifugeal force upon the outsides of the planet. Well, why aren't we being thrown off at 1000km/h? Gravity. Stop the earth spinning and you lose the centrifuge... gravity seems that much stronger.

I wonder if astrophysicists have accounted for this too?

Well I think maybe if you have some other force, like magnetism, it could counteract gravity, which is of course on a unit by unit basis much weaker. You could have a ring of metallic rock around the gas. The metal would be itself around the plasma that volcanoes feed into.

There could be several orbits as scientists say that they think the flow of plasma rotates differently than the rest of the earth, and perhaps the metal rotates in a different direction/speed too.

[Radical Raccoon]

Just because everything is moving towards the center doesn't mean there is more pressure at the center than anywhere else

Yes it does. Tons and tons of matter is constantly moving towards the center. It doesn't have to move fast to create more pressure: it's the weight and not the speed. Lay down and have someone softly lay an anvil on your chest. Are you not going to feel its pressure pushing down on you?

Weight is determined by mass multiplied by force of gravity, not mass alone. If you lay an anvil on me in space, I won't feel any pressure, because there is almost no gravity.

Okay, poor analogy. So let's say that you're floating around in space, weightless and all. Then someone lays an anvil infront of you and one behind you. Now imagine that each anvil is equal to the mass of half the earth. That would give them a lot of gravitational force, right? But you're in the center, so you wouldn't feel anything, but what about the 2 anvils themselves? They would still be attracted to each other, so now they are both pushing on you because they are trying to move closer together due to their gravitational attraction towards each other. No pressure, eh? ^_^

[Agamemnus]

Obviously if the anvils are made of smelted iron then this would not be good for me. If the anvils are instead permeable then I would be ok.

[Radical Raccoon]

But remember how massive they are? Each of their gravity would be equivilant to something around 4.4m/s^2. So now you have a force of (4.4m/s^2)*(half the mass of the earth) pushing on you from both sides. You'd be crushed. You're thinking that somehow you'd be safe in the middle because there is no gravity. But there is gravity, you're just canceled out from the equivilant mass on both sides. The 2 masses still want to come together whether you're in the middle or not, and their gravitational force will make it so. Then once they collide and become 1 object, gravity will not stop there. It will still cause a force for everything to push towards the center of gravity.