Adam Brown

The finiteness of the speed of light means you cannot have an arbitrarily strong rope with a given mass per unit length.

There is a bound set by the c squared in some units that bounds the maximum possible tensile strength that any rope can have.

Any rope, in fact, that has that, or an example of a rope that has that is a string.

So a string is...

I mean, a fundamental string from string theory is an example of a hypothetical rope that is just strong enough to saturate that bound, that strength bound.

And then the problem is the following.

The problem is that if you have a rope that saturates the bound as strong as any rope can be, it is just strong enough to support all of its own weight.

exactly on the edge there, with exactly no strength left over to support any payload it might wish to carry.

And that's ultimately what dooms these mining black holes, you know, these rapid mining black hole proposals.

Well, you can't.

One example of a thing that goes wrong is the speed of sound in a rope is...

goes up with the tension and down with the mass point at length.

And if you try and use a rope that's stronger than this, or some hypothetical rope, you would find that the speed of sound is greater than the speed of light.

And that's a pretty good indication.

What is the speed of sound?

So if you just take a rope, you know, stretch between you and me and ping it, there will be little vibrations that head over towards you.

And those vibrations...

a subluminal, if it's just a normal rope, or move at the speed of light for a string or something that saturates the nullity condition and would be faster than the speed of light for some, you know, that would be an example of why you know there's something wrong with that proposal.

Yes.

Nothing is ever a coincidence.