My understanding is that the physicists (even the ones doing work on the LHC) do not rule out the possibility of a mini black hole being created but they feel that it will simply evaporate too quickly to do any harm thanks to Hawkings radiation. Hawkings radiation is purely theory with NOTHING but speculation and reams of mathematical models to back it up. Mathematical models have also indicated a near infinite number of solutions for string theory. Scientists have not proved infallible in the past so why the sudden blind trust?
it is irrelevant to the fate of the world if tiny black holes are created and they do not evaporate.
QUOTE (jaydfox)Luckily, such a small black hole would take a very, very long time to swallow the earth. Probably billions, if not trillions of years. At first, its surface area would be smaller than a proton: it would have a hard time swallowing the occasional atom.
By the time the black hole could work itself up to the size of a large atom (say, a nanometer in diameter), it would have a mass oon the order of 10^15 kg, the merest fraction of the earth's mass. At that size, even if we assumed that material was being sucked in at the speed of light, through a surface area of about 12.5 nm^2, the rate of mass consumption would only be about:
1.25x10^-17 m^2 * 3x10^8 m/s = 3.8x10^-9 m^3/s
That's 4 cubic millimeters per second. That's nothing. After a billion seconds, about 30 years, that's four cubic meters. Still nothing. After 30 million years, that'd be 4 million cubic meters, less material than is spewed from a large volcanic eruption.
We don't need to worry about black holes this small, even if Hawking radiation doesn't exist.
QUOTE (Jaydfox)Of course it would accelerate. By the time the black hole could double in mass, it would have four times the surface area, so the rate of mass consumption would increase by a factor of four. So four cubic millimeters per second would go up to 16 cubic millimeters per second! To get a lower bound on the time it would take to double in mass from 10^15 kg to 2x10^15 kg, let's assume the full 16 cubic millimeters per second, and let's assume a density of 25 grams per cubic centimeter.
At 1.6*10^-8 m^3/s * 2.5*10^4 kg/m^3, we get 4*10^-4 kg/s. So it would take about, oh, 2.5*10^18 seconds to double in mass, as a lower bound. That's billions of years, to accelerate by a factor of four. The next factor of four would take half the time (twice the mass through four times the surface area), so the acceleration itself would accelerate. But it would take billions of years before the acceleration had any meaningful effect.
The bottom line is, a black hole this small is effectively insignificant, at least as far as the fate of earth is concerned.
http://www.imminst.o...mp;#entry138019
do please at least try to find old threads on the subject and restart those, instead of making brand new ones that need to go through all the stages the old ones already went through before any new information is brought forth...
Instead of humans being afraid of viruses and bacteria, there would be a new threat to humanity, these little damn black holes floating around and through our Earth. Sounds great.
So elrond, how would you like one of these black holes shooting through your body? There wouldn't be a way to contain them because they would inevitably devour all matter in their way!
Since black holes have mass, wouldn't they just fall into the center of the Earth?