Page 7 of 7 [ 100 posts ]  Go to page Previous  1 ... 3, 4, 5, 6, 7

Jono
Veteran
Veteran

User avatar

Joined: 10 Jul 2008
Age: 43
Gender: Male
Posts: 5,657
Location: Johannesburg, South Africa

19 Sep 2011, 9:05 pm

androbot2084 wrote:
No, you are saying that it takes a Star with a minimum mass of ten Suns to create a black hole and that a miniature black hole is impossible.


I think you should learn to read. I did not say that miniature black holes were impossible. I said that to create any kind of black hole, matter has to be compressed to a critical density. Everything I have said about the mass limit only means that such miniature black holes cannot be created by collapsing stars. However, my statement still stands, it's just that the matter would need to be compressed with some kind of extreme external pressure, since gravity cannot ever be strong enough to do it. An explosion doesn't compress matter.

Oh, and by the way, there is nothing useful that you could do with such miniature black holes anyway because they can't even exist for longer than a few nanoseconds before decaying into a jet of many elementary particles.



Jono
Veteran
Veteran

User avatar

Joined: 10 Jul 2008
Age: 43
Gender: Male
Posts: 5,657
Location: Johannesburg, South Africa

19 Sep 2011, 9:18 pm

androbot2084 wrote:
Anyway I calculated that there are 3000 trillion tons of heavy water in the worlds oceans which at a million to one energy density ratio would equal to 3000 million trillion tons of dynamite. So now I have to figure out how many solar panels I will need for the equivalent energy output to create my artificial black hole.


Like I said, it doesn't work like that. The energy alone cannot produce miniature black holes. You have to actually compress a certain amount of matter to the critical density. The massive hydrogen bomb spoken about by Stephen Hawking in "A Brief History of Time" (which you so aptly spoke of), could hypothetically do this to a small amount of matter contained in the centre of the bomb and the extreme pressure to do it comes from the incredible strength of the blast. Simply raising the temperature cannot do anything other than vaporize the matter.



techstepgenr8tion
Veteran
Veteran

User avatar

Joined: 6 Feb 2005
Age: 45
Gender: Male
Posts: 24,514
Location: 28th Path of Tzaddi

19 Sep 2011, 9:56 pm

ruveyn wrote:
androbot2084 wrote:
Stephen Hawking made the assertion that if a hydrogen bomb were built that used all the deuterium in the worlds oceans that a black hole would be created.


And if my grandmother had balls she would be my grandfather.

ruveyn

That's a hot visual.


_________________
The loneliest part of life: it's not just that no one is on your cloud, few can even see your cloud.


iamnotaparakeet
Veteran
Veteran

User avatar

Joined: 31 Jul 2007
Age: 39
Gender: Male
Posts: 25,091
Location: 0.5 Galactic radius

19 Sep 2011, 10:20 pm

Vigilans wrote:
Could this thread please go back on track?


Okay:

[youtube]http://www.youtube.com/watch?v=sdgjxvgmRpU[/youtube]

http://solarsystem.nasa.gov/planets/pro ... ject=Titan


So, when we get out there and colonize Titan, how would that methane and ethane be most useful? As a trade commodity? As a resource to be used on Titan itself for subsurface industry? Would it really be something to fight over once we get all the way out there or would we have already gotten out of our usage of hydrocarbons for most things?