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your thoughts? if so, when did the law come into effect? and why wasnt it in effect during or before the big bang?

2007-06-28 01:12:41 · 10 answers · asked by mrzwink 7 in Science & Mathematics Physics

so there was only energy before the big bang? or only matter?

2007-06-28 01:22:59 · update #1

10 answers

Under general relativity, there is no 'before the Big Bang'. The problem is that time is itself a part of the universe and is affected by matter and energy. Because of the huge densities just after the Big Bang, time itself is warped in such a way that it cannot go back before that event. It is somewhat like asking what is north of the north pole.

The conservation of matter and energy states that the total amount of mass and energy at one time is the same at any other time. Notice how time is a crucial part of this statement. To even talk about conservation laws, you have to have time.

The upshot is that the Big Bang did not break the conservation laws because time itself is part of the universe and started at the Big Bang and because the conservation laws need to have time in their statements.

2007-06-28 01:56:40 · answer #1 · answered by mathematician 7 · 3 1

There is no need for the big bang to break the energy conservation principle and conservation of energy doesn’t always hold in the same way as it hold in normal dally life. In the quantum systems energy follows the Heisenberg uncertainty principle. Energy dE can come out of existent for short period of time dt, where dE.dt≥ h/2π, this is called quantum fluctuation of the vacuum and this is confirmed by the experiments and is responsible for black hole radiation. It is speculated that the energy of the universe is very close to zero and by applying the uncertainty principle you come up with very large dt (the existence time of the universe). That means that universe might be a quantum fluctuation.

Also according to Noether's theorem, conservation of energy is linked to and defined by the homogeneity of the time and time is not necessarily homogeneous at the time of big bang (singularity) so energy is not necessarily conserved. And also we don't know what nothing literally means because any thing you have, at least contain space-time.

Gravitational potential energy of the heavy bodies contribute negative energy, so if you add up all the other energy with all the gravitational potential energy the sum might be zero but there are many things unknown like dark mater, dark energy ect therefor nobody can say for sure about the total energy of the universe.

2007-06-28 15:06:55 · answer #2 · answered by MS 2 · 0 1

All known scientific laws are assumed to have started at the time the Big Bang occurred. There may have been laws -- the same ones or different ones -- before the Big bang, but there is no way for us to tell. As far as we are concerned, the Big Bang is the beginning, and the event imposes a sort of cosmic censorship beyond which we can't really know.

2007-06-28 08:50:04 · answer #3 · answered by Runa 7 · 0 1

The THEORY of Big Bang violates the law of conservation of energy and matter. Energy can not be created out of nothing and matter can not be created out of nothing. You can, according Einstein, create matter out of energy or energy out of matter.
But the Big Bang theory states that before the Big Bang there was nothing.

Fact is that today we have an universe with a lot of matter and a lot of energy. This can NOT be explained in a plausible and confident way by the Big Bang theory.

2007-06-28 08:27:48 · answer #4 · answered by Ernst S 5 · 3 2

Aside from conservation of baryon numbers, the big bang theories violate conservation laws only if you try to extrapolate farther back in time than is meaningful. Extrapolation is notoriously unreliable. The farther back we go in time, the less likely our predictions are to be true. We simply don't know anything about such a thing as 'before' the big bang.

2007-06-28 16:36:52 · answer #5 · answered by Frank N 7 · 0 0

No.

Before the Big Bang there was a Big Crunch which was the constriction of a previously existing universe.

After our currently existing universe collapses upon itself, there will be ANOTHER Big Bang.

After that happens, somebody else will eventually ask the same question.
.

2007-06-28 09:51:58 · answer #6 · answered by Anonymous · 0 2

No, the original mass may have been a singularity but that offers us no clue as to quantity. The energy in the system itself has remained constant(purely potential to some potential and some kinetic).

2007-06-28 11:04:13 · answer #7 · answered by yasiru89 6 · 0 3

No because before the Big Bang, there was no matter just pure energy.
Eamonn.

2007-06-28 09:11:00 · answer #8 · answered by Anonymous · 0 4

No
it is the proof Einstein theory

that matter can be converted to energy

2007-06-28 08:17:32 · answer #9 · answered by CPUcate 6 · 0 2

No it was the introduction of it.

2007-06-30 13:51:27 · answer #10 · answered by johnandeileen2000 7 · 0 0

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