1. wat will happen to the mass after the vanishing of the volume ..... is it will change to
energy .................... that just aquistion and i need just an quick answer

2.

3. Originally Posted by Ahmed gamal
wat will happen to the mass after the vanishing of the volume ..... is it will change to
energy .................... that just aquistion and i need just an quick answer
The answer is that this is nonsense.

Volume does not vanish.

This has nothing to do with absolute zero.

4. I wonder if something was mixed up in the translation to English -

and Ahmed was asking about mass in a singularity (ie, zero volume; infinite density stuff),

rather than about "0 Absolute" (0.0 K)?

5. Originally Posted by Cran
I wonder if something was mixed up in the translation to English -

and Ahmed was asking about mass in a singularity (ie, zero volume; infinite density stuff),

rather than about "0 Absolute" (0.0 K)?
If that is the case then the answer is not much changed.

A singularity in general relativity is an indication that the theory has broken down, and it is not physical. In fact the singularity is not a part of spacetime.

It takes quite a bit of work to simply define what one means by the exitence of a singularity in the context of cosmology and general relativity.

The application of thermodynamics to black holes is a difficult and very specialized area of physics. There are problems with the area, as it is a case of quantum field theory in highly curved spacetime and there are quite a few unresolved issues. To get into it in any detail would require a real expert. Try Bob Wald or Stephen Hawking.

6. Perhaps Ahmed is referring to the ideal gas law: PV=nRT
According to this equation, when T reaches zero V should reach zero. If that's the case, the reason this doesn't work is that gases are not ideal near absolute zero.

7. Originally Posted by gc
Perhaps Ahmed is referring to the ideal gas law: PV=nRT
According to this equation, when T reaches zero V should reach zero. If that's the case, the reason this doesn't work is that gases are not ideal near absolute zero.
Not at all.

According to that equation when T reaches 0, P reaches 0. It says nothing about V.

8. Originally Posted by DrRocket
Not at all.

According to that equation when T reaches 0, P reaches 0. It says nothing about V.
Depend on if it's done at constant V or constant P.

9. It obviously can't be done at a constant P in any real system, since that'd mean V would be 0 (ignoring the fact that you can't get T to 0 in a real system anyway).

10. Originally Posted by MagiMaster
It obviously can't be done at a constant P in any real system, since that'd mean V would be 0 (ignoring the fact that you can't get T to 0 in a real system anyway).
True, which is why the ideal gas law is not a good approximation near absolute zero as it does not take into account the size of the molecules.

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