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Posted: 25 Sep 2005, 17:17
by AF
Eitherway that statement of blackholes having finite gravity is a contradiction. By very definition they ahve infinite gravitational pull at the even horizon, they're singularities of infinite density by definition.

Posted: 25 Sep 2005, 22:54
by jcnossen
Black holes have a mass, and therefore a finite gravity at a distance of nonzero from the black hole. This means the gravity at the event horizon will also be finite.

Posted: 26 Sep 2005, 20:09
by AF
That's obvious, but I'm talking more about relative to the blackhole, rather than a point thousands of AU's away. A point such as the event horizon where nothing can escape can be considered to have infinite gravity, it's a matter of perspective.

Has anyone seen cube 2: hypercube? the sequel cube:zero's on sci-fi tonight =D

Posted: 26 Sep 2005, 21:08
by jcnossen
Eh, it's not a matter of perspective, it's just math: given the mass of a black hole you can calculate where the event horizon is and you can calculate what the gravity is at the event horizon. :|
If anything in the universe has infinite gravity we'd all be pulled to it right now.
The gravity of an object causes isn't relative to anything.

Posted: 26 Sep 2005, 21:20
by Min3mat
surely its relative to distance? or its effect is lessing from distance? can you tuen infinity back into a real number? :s stfu physics and maths...why oh why didn't i drop BOTH @ A2 :(

Posted: 26 Sep 2005, 21:25
by AF
Ha, maths aint that hard at A2, depends what bit your talking about.

Yah gravity falls away as you distance yourself from the singularity. Xept your confusion may be coming from your view of gravity. Think of it as a result of space curvature and not of some strange force pulling downwards.

Posted: 26 Sep 2005, 21:31
by jcnossen
surely its relative to distance?
It's a function of distance, but it's not relative to distance, right? :roll:

Posted: 26 Sep 2005, 22:01
by aGorm
What I dont get is why your still talking about it... The simple answer to theres questions is

Go to teh Pub

have a Beer

Come back and copy and paste out a random section of a page

aGorm

Posted: 27 Sep 2005, 20:45
by AF
It can be both. It depends on how you percieve it.