Freethought & Rationalism Archive

Answerer · 04-21-2003, 07:43 PM

Quote:

Originally posted by eh
How in the world one decides a universe with zero net energy does not exist, is beyond me. Energy is not some fundemental substance (or aether) that makes up the universe.

I think the idea of the universe having a zero net energy comes from the uncertainity principle and vaccum fluctations. Some physicists like to assume that vaccum fluctation is the quantum cause for our universe. And according to the uncertainity principle, *delta*E X *delta*T= h*bar/ 2, if we have a zero net energy, the lifetime of our universe will be infinite. But its just another unproved theory.

abe smith · 04-24-2003, 06:58 AM

"who is it that thus darkeneth counsel by words without knowledge?" and those words are spelled "vacuum" and "particle".

Farren · 04-24-2003, 01:16 PM

Quote:

Originally posted by GPLindsey
Zero is nothing--the absence of value. But you can get to zero by adding positive and negative numbers that cancel each other out, such as 10 billion plus negative 10 billion.

Now, for every particle in the universe there is an anti-particle. In effect, there is a positive universe and a negative universe existing side by side. Therefore, to combine the two and describe the total universe conceptually as a mathematical formula, you would have to say that its value is zero, or nothing. Thus, to religious critics who beat up the nonreligious with the metaphysical question: "How can you have something from nothing?" The answer is simply that there really is NOTHING--the universe does not exist!

So, if I have R1 - ok a $1 note, nobody knows SA currency - and you owe me $1, there are no $1 notes?

Farren · 04-24-2003, 01:22 PM

I'm not a physics boff, but I once saw a Feynman diagram of a particle-antiparticle collision with some itsy bitsy particles coming out of the collision. The caption underneath speculated that since the positron can be seen as a time reversed electron, this can in fact be seen as a particle throwing off some energy and changing direction in time. Comment?

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04-24-2003, 06:58 AM	#32
abe smith Veteran Member Join Date: Apr 2001 Location: springfield, MA. USA Posts: 2,482	"who is it that thus darkeneth counsel by words without knowledge?" and those words are spelled "vacuum" and "particle".

04-24-2003, 01:22 PM	#34
Farren Veteran Member Join Date: Nov 2001 Location: South Africa Posts: 2,194	I'm not a physics boff, but I once saw a Feynman diagram of a particle-antiparticle collision with some itsy bitsy particles coming out of the collision. The caption underneath speculated that since the positron can be seen as a time reversed electron, this can in fact be seen as a particle throwing off some energy and changing direction in time. Comment?

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