In General Relativity, spacetime itself is described as a single 4-surface (a four-dimensional manifold with a Lorentzian metric)
Using the generalized definition of an n-surface (where an n-dimensional manifold is treated as a single geometric object), how many surfaces does a single four-dimensional pseudo-Riemannian manifold constitute?
The answer is 1.
The relationship between mean density, surface density, and the radius is ρ = 3σ / r
For a manifold with only 1 surface, σ is a constant.
If 3σ is a constant,
ρ ∝ 1/r
What this means is that for a constant surface density, there is a 1/r distribution of matter.
@MaxEllison2048@ramzpaul 2%?! WTF There 370 quintillion gallons of water on the planet. We need it for trees, animals etc. 2 percent is a fucking retarded amount of water. And for what, so you can make gay thumbnails of yourself?
@Jbn3ex People think bears can do stuff to dogs? That's hilarious because that dog could bounce around that bear for a week and the bear would not be able to do anything about it.