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### Topics - macrohard

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##### Technology, Science & Alt Science / Low Density Black Holes
« on: February 04, 2015, 08:33:37 PM »
Today I learned that a black hole can theoretically be less dense than air.

True radius is proportional to the cubed root of mass.  Mass increases by a factor of 8 while the radius doubles in order to maintain density.

However, Schwarzschild radius grows proportional to mass!

This means for any arbitrary non-zero density there exists a mass such that the Schwarzschild radius is equal to the physical radius: a black hole.

Edit: apparently the wiki article on Schwarzschild Radius talks about the same thing but says it better:
"If you assume that the Schwarzschild radius is the outer edge of the black hole (note that this assumption is in contrast to the typical assumption that a black hole is a singularity, and therefore has zero radial extent). Under this assumption, the average density of a supermassive black hole can be less than the density of water.

The Schwarzschild radius of a body is proportional to its mass and therefore to its volume, assuming that the body has a constant mass-density.[7] In contrast, the physical radius of the body is proportional to the cube root of its volume. Therefore, as the body accumulates matter at normal density (in this example, 103 kg/m3, the density of water), its Schwarzschild radius will increase more quickly than its physical radius. When a body of this density has grown to around 136 million (1.36 × 108) M☉, its physical radius would be smaller than its Schwarzschild radius, and thus it would form a supermassive black hole."

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##### Flat Earth Q&A / Thickness of the Flat Earth
« on: July 21, 2014, 01:04:01 PM »
Given the world is flat...

Approximately how thick is it?  I'm assuming nobody knows for sure, but I'm interested in your guesses and why.

PS: RE, please do not derail this thread.  I'm looking for the FE viewpoint and theories.

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##### Flat Earth General / social interaction and personal relationships in a modern world
« on: July 20, 2014, 02:32:18 PM »
As an FE, how do people react when you share your theories?  I'm referring to real life and in person relationships.

Family members?
Potential romantic interests?

Do you tell them your views on the first date?  Do you keep it a secret forever due to fear of rejection from the ignorant and indoctrinated populace?  Would you be willing to be involved with someone who did not take your position seriously?

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##### Flat Earth Q&A / Meteors and Comets
« on: July 17, 2014, 08:26:08 AM »
What are the explanation for meteors and comets?
Where do they come from?

I've seen shooting stars in person.  I've visited a few famous craters.  I remember seeing Hale-Bopp after astronomers predicted it's appearance far in advance.  I remember the news when that meteor got caught in Jupiters gravity and broke up and collided.

I'm just interested what the explanation is within the context of FE, UA, and glass dome.

Thanks.

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