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That is a completely invalid comparison for a start. Negative matter (assuming it could exist)...
The whole idea that dark energy is a positive energy exerting a negative pressure is dependent on certain theories concerning vacuum energy
There is a difference between negative potential energy and negative energy.
That wiki page contains no math to actually prove the claim that the negative energy of gravity is enough to balance out the negative energy of matter
it makes no distinction between negative energy and negative potential energy.
It seems (ChaoticOrder is) about the only one on here who has some real knowledge.
When anti-matter collides with normal matter it releases energy because they are both forms of positive matter but they are inverses or mirror images, so they annihilate each other and turn into pure energy.
KrzYma
ImaFungi
Panic2k11
reply to post by ImaFungi
Time is infinite.
No it isn't time time-space is relativistic dimensional scale.edit on 14-1-2014 by Panic2k11 because: (no reason given)
Time never began and will never end. Time is infinite.
depends what you define as time
But there is no such thing as negative matter. It does not exist.
Although no particles are known to have negative mass, physicists (primarily Hermann Bondi and Robert L. Forward) have been able to describe some of the anticipated properties such particles may have. Assuming that all three concepts of mass are equivalent the gravitational interactions between masses of arbitrary sign can be explored.
en.wikipedia.org...
Nonsense. Dark energy is a postulate intended to explain certain unexpected but well-documented phenomena, such as gravitational lensing.
There is no theoretical structure behind it at all. Dark energy is a mystery.
What is the difference? Please entertain us with your explanation.
It doesn't balance out. That is why the universe is expanding.
Can you please explain the difference between 'anti-matter', 'negative matter', and 'dark matter'?
mazzroth
In Nature Zero exists everywhere, 4 apples fell off the tree and that left zero apples on the tree
Astyanax
Nonsense. Dark energy is a postulate intended to explain certain unexpected but well-documented phenomena, such as gravitational lensing.
ChaoticOrder
I think you're getting your words mixed up. Dark energy is used to explain the expansion of the universe. Dark matter is used to explain phenomena such as gravitational lensing.
(The energy in the universe) needs to balance out in order for the zero-energy universe theory to be correct. The reason the universe expands is because of dark energy, and according to theories of dark energy it is supposed to be a positive energy, it just behaves weirdly and exerts a negative pressure on space.
Potential energy is simply a potential for work to be done, not a real physical measurable energy.
Units of measurement for energy are usually defined via a work process. The work performed by a given body on another is defined in physics as the force (SI unit: newton) applied by the given body, multiplied by the distance (SI unit: metre) of movement against the opposing force exerted by the other body. Thus, the energy unit is the newton-metre, which is called the joule. The SI unit of power (energy per unit time) is the watt, which is simply a joule per second.
Astyanax
reply to post by ChaoticOrder
Astyanax
Nonsense. Dark energy is a postulate intended to explain certain unexpected but well-documented phenomena, such as gravitational lensing.
ChaoticOrder
I think you're getting your words mixed up. Dark energy is used to explain the expansion of the universe. Dark matter is used to explain phenomena such as gravitational lensing.
You are right; I got the terms mixed up. But my comment holds true for dark energy as well as for dark matter: it is a name given to the unknown whatever-it-is that causes the universe to expand. Like dark matter, it is invoked as the hypothetical cause of a real phenomenon. It does not derive from theory but from observed fact. And although there are various hypothetical explanations for it, all of them are post hoc in nature.
(The energy in the universe) needs to balance out in order for the zero-energy universe theory to be correct. The reason the universe expands is because of dark energy, and according to theories of dark energy it is supposed to be a positive energy, it just behaves weirdly and exerts a negative pressure on space.
The expansion balances it out. See here.
Potential energy is simply a potential for work to be done, not a real physical measurable energy.
My dear friend: you evidently find physics — particularly the more exotic departments of it — fascinating. Surely a closer acquaintance with the fundamentals of the subject can only enhance your enjoyment? Ask yourself, please — how can you understand what the concept 'dark energy' means when you apparently don't even know what ordinary energy is?
All energy is, ultimately, the capacity to do work. It is so by definition:
Units of measurement for energy are usually defined via a work process. The work performed by a given body on another is defined in physics as the force (SI unit: newton) applied by the given body, multiplied by the distance (SI unit: metre) of movement against the opposing force exerted by the other body. Thus, the energy unit is the newton-metre, which is called the joule. The SI unit of power (energy per unit time) is the watt, which is simply a joule per second.
This, too, may help. How to calculate potential energy: A simple tutorial.
There are other forms of potential energy besides the gravitational; the potential energy of combustion of gasoline, for example, or the stored charge in a capacitor. These, too, can be quite easily calculated. More about potential energy.
edit on 18/1/14 by Astyanax because: of dangerous potential.
The expansion balances it out.
There are other forms of potential energy besides the gravitational; the potential energy of combustion of gasoline, for example, or the stored charge in a capacitor.
ChaoticOrder
When a plane flies high into the sky it doesn't gain energy/mass because it's higher in the earths gravitational field, there is nothing at all different about that plane compared to when it is on the ground (apart from the time dilation and length contraction but that's a whole other story). The point is that there no measurable energy difference, the gravitational force which is trying to pull that plane to the ground is a consequence of the space-time geometry around the Earth being warped by the large positive mass of the Earth, and it's absolutely debatable whether that geometry actually represents a state of negative energy, especially when viewed through the lense of LQG.edit on 18/1/2014 by ChaoticOrder because: (no reason given)
Zanti Misfit
reply to post by Korg Trinity
I alos have a " Hairbrained Theory " . Before our Universe was Created , it's Total Value was Zero . Afer our Universe came into being , it's Value was 1 . As our Universe Exspanded , all Matter and Energy became Fractions of 1 . When our Universe finally comes to an End due to the Theory of Entrophy , it's Value will return to Zero . How's that Sound ? ............
There is a much simpler explanation for dark energy which allows a zero-energy universe without all these elaborate patch jobs.
*
According to Loop Quantum Gravity mass itself is directly derived by space-time density... as in how much space-time is required to form stable braids x how many braids there are.
So we can conclude that energy = the vibration constant of space-time at it's fundamental level (quantum fluctuations). These fluctuations of space-time at the Planck scale are caused by the very rule I proposed. Zero is a non valid value. In other words space-time itself can never be truly still.
Do you follow?
Astyanax
No, I don't. To say that energy is 'the vibration constant of spacetime' (whatever that is) makes no sense, since energy is a variable quantity, and constants are constant. LQG is one of many speculative hypotheses attempting to unite quantum theory and relativity. Unfortunately, it has yet to make a testable prediction that is not already made by existing physical theories, so there is no way of determining whether it is 'true'. Of course, that need not stop us from invoking it to sound impressive and learned to people who don't know any physics — what do you say?
Indeed there is, but it is one of several competing explanations. Being simple doesn't make it the right one.
Concerning gravitational potential energy, I've already shown you how it is calculated. Perhaps you didn't bother to look at the link?
When anti-matter collides with normal matter it releases energy because they are both forms of positive matter but they are inverses or mirror images, so they annihilate each other and turn into pure energy.