The end of the world...IS TOMORROW?!
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#46:  Author: UneNoid PostPosted: Thu 11 Sep, 2008
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Still I do not understand the reason why this He from the magnets should start the fusion process. Ok theoretically every light element since iron 56 can undergo fusion reaction but practically heavyer product than helium are rare even in star reactions (exept supernova).

In H-bomb the He is the product not a fuel.

#47:  Author: Bruno PostPosted: Thu 11 Sep, 2008
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UneNoid wrote:
Still I do not understand the reason why this He from the magnets should start the fusion process. Ok theoretically every light element since iron 56 can undergo fusion reaction but practically heavyer product than helium are rare even in star reactions (exept supernova).

In H-bomb the He is the product not a fuel.

wikipedia: "criteria & candidates for terrestrial [fusion] reactions".

↑ nope, He can also be used in fusion reactions.

#48:  Author: Aksel PostPosted: Thu 11 Sep, 2008
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Some calculation estimates that it might take 50 months to 50 years for a stabilized black hole to grow big enough to tear us up big time. Life would suck for a long time in other words.
We shouldn't forget the hypothetical strangelets, though o_O
Imagine the earth as a pile of strange matter eek2

Someone at school mentioned that she found it funny that some claimed a micro black hole to spend around 50 months to become big enough, as that's about 4 years from now. Will we bring 2012 upon ourselves? woo eek2

But I think I'll just trust Hawking on this one.

#49:  Author: UneNoid PostPosted: Thu 11 Sep, 2008
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I also metnioned that if I sayd except iron 56. But look at the table in your link and you will see that where is no reaction presented there He 4 is a reactant (fuel). It is alway a product. So making a nuclear bomb from He 4 is not the easiest thing smile

The case would be different if they use He 3 for cooling (physicists sometimes do that), but its much more expensive and I do not see the reason for that in this system.

I still exculde this H-bomb danger.

#50:  Author: Carnun PostPosted: Thu 11 Sep, 2008
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bruno wrote:
Carnun: so you say it could be out there, right now? how exciting!


eh Carnun rereads his post... Nope Bruno, I did not say or suggest such things. As has already been posted the first collision is still to take place some time in mid October.

#51:  Author: Arabinator PostPosted: Thu 11 Sep, 2008
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According to a newspaper in the town i live in, there were reports of 14-year olds coming to their school crying about the world going under.

#52:  Author: Ghosteh PostPosted: Thu 11 Sep, 2008
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Arabinator wrote:
According to a newspaper in the town i live in, there were reports of 14-year olds coming to their school crying about the world going under.

Some panic from the "old" schoolstudents, right, or do they know about this?

#53:  Author: Bruno PostPosted: Fri 12 Sep, 2008
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Arb wrote:
According to a newspaper in the town i live in, there were reports of 14-year olds coming to their school crying about the world going under.

were you among them? ;p anyhow, tell your colleagues they needn't worry: they can keep track of doomsday online (rss feed available), and should there be any reason for them to freak out and go live life like there was no tomorrow, they'll be told in advance. :-)

#54:  Author: Lizard King PostPosted: Fri 12 Sep, 2008
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bruno wrote:
to be sure:
Quote:
four to seven minutes of being sucked by an ever-increasing force of gravity, subject to internal bleeding and excruciating migraines, not to mention the ground trembling and tearing itself open, and houses generally falling on you? (wait, that actually does sound kind of cool).


I doubt that. The rate would be constantly accelerating, I'd imagine once it gets some ground it'd get going very fast. It's a black hole after all.

Four to seven minutes has got to be too much.

#55:  Author: Bruno PostPosted: Fri 12 Sep, 2008
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Lizard King wrote:
Four to seven minutes has got to be too much.

alright, first off: i was joking. no really, half my posts in this topic aren't serious, mainly because i myself can't take doomsday seriously --- i'm not saying i don't believe in doomsday, i just can't take it seriously.

that being said, and now in all seriousness, you might be right: four to seven minutes can be too much. they can also be way too little: a black hole can take years to consume a planet the size of Earth. here's a quick explanation of what a black hole is: it's a point (as in "a zero-size body") called singularity with a preposterous quantity mass. if you were to do it old school and calculate its density as mass over volume, you'd find out its mass is infinite, which under old school gravitation laws would mean singularities are quickly swallowing the universe.

lucky for us that theory has been proved wrong already. what happens with singularities is, their mass will create a (really strong) gravitational force. things will be attracted to the singularity. and there's some point, which varies greatly depending on the mass of the singularity, at which there's no return. there's this distance from singularities which we call "event horizons", explaining exactly what they mean is quite dull, but it works for now to ask you to think that whatever gets closer to the singularity than that distance has no coming back.

that weird system made of a bodiless point, the singularity, and its influence zone within the event horizon, is what we call a black hole. right. so what is the size of a baby black hole? honestly, i've no freaking idea. but here's an interesting figure: the minimum mass for a primordial black hole (i.e. one originated at the Big Bang) seems to be 1 000 000 000 000 kg (= 2 200 000 000 000 pounds). it would take 10 000 000 000 000 000 000 000 000 000 years for one such baby black hole to swalow the whole Earth. (which i suspect is longer than the Earth will live, anyway, and at any rate long enough for you not to care).

for more information: great article on Universe Today, and then some more. ;-)

#56:  Author: Lizard King PostPosted: Fri 12 Sep, 2008
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That's interesting. It makes it impossible to imagine what exactly it would look like (not literally) should a black hole form that has the power to consume the planet.

Surely the mass has to come from somewhere, leading me to believe that the concept of this destroying earth is preposterous.

But of course, if it does happen, and it's a quick consumption, I would assume that although we may not die right away, consciousness would be gone in a matter of seconds due to forces acting on the body.

#57:  Author: Ghosteh PostPosted: Sat 13 Sep, 2008
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Why even concern confused this hole is nothing to be afraid of. Were not going under and thats it tounge2

#58:  Author: Lizard King PostPosted: Sat 13 Sep, 2008
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GHOSTIE11 wrote:
Why even concern confused this hole is nothing to be afraid of. Were not going under and thats it tounge2


Agreed.

#59:  Author: Mew151 PostPosted: Mon 22 Sep, 2008
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If it does create a black hole, the black hole will be extremely weak, and would last only an extremely small period of time.
And besides, the Earth is still here right now.

#60:  Author: Ghosteh PostPosted: Mon 22 Sep, 2008
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Mew151 wrote:
If it does create a black hole, the black hole will be extremely weak, and would last only an extremely small period of time.
And besides, the Earth is still here right now.


True, the only fear of earths destruction is because of incompetent (sorry) people who dont realise that the holes are too weak. I was worried too, til my SC told me its nothing dangerous.
And thats it tounge2



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