Thread: May 2008 (LHC) Particle Accelerator - Miracle or Catastrophe?

Take a physics class before calling people 'fucking morons', you pretentious cock.

A gravitational field acting at comparable distances from the mass which causes it as in this case will act upon every single atom in Sandform's body with almost exactly equal force. With two on either side of him, the resultant force on every single atom would be 0, so no atom in his body would accelerate in any direction. Even if there was one, in fact, there would be no ill effects until he got very close to the black hole, because every atom in his body would be accelerating at the same rate so there would be no shearing effect between the atoms in his body.

I wrote a big long post in response to Drew, but then I saw Xie responded with basically what I said...

Originally Posted by Xei

Take a physics class before calling people 'fucking morons', you pretentious cock.

A gravitational field acting at comparable distances from the mass which causes it as in this case will act upon every single atom in Sandform's body with almost exactly equal force. With two on either side of him, the resultant force on every single atom would be 0, so no atom in his body would accelerate in any direction. Even if there was one, in fact, there would be no ill effects until he got very close to the black hole, because every atom in his body would be accelerating at the same rate so there would be no shearing effect between the atoms in his body.

That's only true if the black holes are infinitely far away.

The effects are still incredibly minimal at relatively small distances. Bear in mind that any black holes created wouldn't actually have a mass greater than Earth, and the difference in force caused by the inverse square law that we experience because of the length of our bodies on Earth itself is very tiny.

I just did a quick calculation and I got the percentage difference to be 0.00000625% using Earth's radius as 64000km and the height of a person as 2m. Hardly enough difference in force to tear you apart.

Ha! Google has a LHC themed logo today.

Originally Posted by Scatterbrain

Ha! Google has a LHC themed logo today.

Conspiracy.

I meant that there gravitational force would be tiny.

I really didn't even think about what the size would be, although I assumed it would be small...

Earlier on someone said "oh noes were all gonna get sucked into a black hole" and then someone else said "the force would be tiny and the hole would collapse quickly."

Well sure, same thing really, tiny mass or tiny force. Black holes are actually all treated as infintesimal points so they all have the same size, the only thing that varies is their masses and speeds of rotation.

Tiny black holes would probably decay very quickly, yes, as a consequence of quantum theory. It's called Hawking radiation. The problem is that it's never been observed.

Originally Posted by Xei

The effects are still incredibly minimal at relatively small distances. Bear in mind that any black holes created wouldn't actually have a mass greater than Earth, and the difference in force caused by the inverse square law that we experience because of the length of our bodies on Earth itself is very tiny.

I just did a quick calculation and I got the percentage difference to be 0.00000625% using Earth's radius as 64000km and the height of a person as 2m. Hardly enough difference in force to tear you apart.

He implied that the singularities would be a lot closer than 6400 km.

He also said they would be tiny.

It's easy to fall into the trap of treating a black hole like some kind of object with incredibly high mass packed into a tiny space, but that's only a requirement for their natural formation, which only happens when a star's mass causes the inward force upon its matter to exceed the electrostatic repulsions between the matter, which can only happen when the star has a huge mass; hence natural black holes have huge masses.

If a black hole was formed at the LHC it would have the mass of a few nucleons; if you think about it, its gravitational effects would be no different than if a gas molecule were floating around your head.

Originally Posted by Xei

He also said they would be tiny.

I meant that there gravitational force would be tiny.

I really didn't even think about what the size would be, although I assumed it would be small...

Earlier on someone said "oh noes were all gonna get sucked into a black hole" and then someone else said "the force would be tiny and the hole would collapse quickly."

Originally Posted by Xei

He also said they would be tiny.

It's easy to fall into the trap of treating a black hole like some kind of object with incredibly high mass packed into a tiny space, but that's only a requirement for their natural formation, which only happens when a star's mass causes the inward force upon its matter to exceed the electrostatic repulsions between the matter, which can only happen when the star has a huge mass; hence natural black holes have huge masses.

If a black hole was formed at the LHC it would have the mass of a few nucleons; if you think about it, its gravitational effects would be no different than if a gas molecule were floating around your head.

Then why are we even talking about this? Obviously I know how this shit works. A black hole of even several hundred pounds wouldn't have any effect even millimeters away.

I'm just answering/correcting your points. I assumed you didn't know that much because your string example was so inappropriate, but if you do then hey.

I'm just chatting, it's an interesting subject.

Originally Posted by drewmandan

A black hole of even several hundred pounds wouldn't have any effect even millimeters away.

Could you have a black hole of several hundred pounds? I always thought they needed enough mass to create a gravitational field strong enough to 'suck in' light. Unless with a several hundred pound black hole, it just had a really small event horizon.

Does anyone know what causes a tiny black hole to collapse? The whole idea of black holes I find very interesting, despite my lack of knowledge about them.