Is there a way to calculate the escape velocity of a black hole? Obviously it has to be greater than or equal to the speed of light but does the formula (2GM/r)^.5 apply to black holes If so what is the radius of a black hole? is it the Schwarzschild radius (I think this is just the radius of the event horizon) or is it simply 0 seeing how their volume is 0.
>>7931168
>but does the formula (2GM/r)^.5 apply to black holes
Yes, there are 2 corrections that perfectly cancel out giving the classical result.
>>7931181
So what exactly would the radius of a black hole be? As far as I understand the Schwarzschild radius is simply the radius at which Vese>c but not actually part of the black hole
Using Planck length for r & ~5SolarMasses I got Vese=10^31meters/second
>>7931184
Since you can't observe what's beyond the event horizon, it's meaningless to talk about anything within the Schwarzschild radius. It's a region of space where our current understanding of physics breaks down.
>>7931168
this made me kek, but whats wrong with the fedora, and reddit is fine
>>7931222
we can't observe a lot of things that does not mean they are meaningless to discuss.
>>7931241
The thing is, we don't know what lies inside. General relativity tells it should all collapse into a point (singularity) and God only knows what is going on there.
>>7931244
I believe the current theory is a singularity with 0 volume thus infinite density.
>>7931225
Reminder that trump supporters are edgy reddit rejects.
>>7931301
> reddit rejects
AKA decent respectable people.
bernie supporters
>stem, arts
trump supporters
>business majors, community college, "skilled trades", factory workers, basement dwellers
trump btfo
>>7931317
Bernie supporters
>autistic
Trump supporters
>closet racists
Everybody's shitty anon
>>7931168
It's the speed of light retard
>>7931323
>bernie vs trump
Why are my only two options an economically illiterate socialist and a proto-fascist con man?
>>7931317
Literally everyone in my engineering department supports trump because he's the only person who actually even talks about h1b abuse.
This shit overwhelming affects STEM.
Coalbernie would love to flood your job market with more pahjeets
>>7931659
>Literally everyone in my engineering department supports trump
There is no way that's true.
>>7931659
>Literally everyone in my engineering department supports trump
Meanwhile in murifat...
>>7931648
because you need to get the illusion of choice
>>7931225
>And Reddit is fine
>>7931641
>retard
If that was the case, light would escape, wouldn't it, genius?
this thread got raped by Bernie fags
>>7931874
just like America
>>7931168
By definition it's c.
When people say "black hole", they mean the region of spacetime enclosed in the event horizon (including the horizon itself).
Another way to write your formula is [math]v_{escape} = c \sqrt{\frac{R_S}{R}}[/math], where R_S is the Schwarzchild radius of the black hole, and R is your distance from the singularity. This is equal to c when your distance from the centre is equal to the radius of the black hole, and goes to infinity as you approach the singularity at the centre.
The R in your formula is the same as the R in mine - it's the distance you are away from the singularity.
>>7931710
>what is gravity
fucking moron
>>7931168
>Is there a way to calculate the escape velocity of a black hole?
The escape velocity/energy of a black hole inside the event horizon = infinite energy
>>7931648
They're the only ones worth discussing. All the others are Corporate %Partyname% Version 2016.
http://www.msnbc.com/msnbc-quick-cuts/watch/trump-or-sanders-description-confuses-trump-624976963567
kek
