# Tag Info

6

Possibly, though you’d be escaping by moving the exit, potentially with hideously unintended side effects. Basically below the event horizon of a black hole spacetime is warped such that nothing you do can alter anything above the black hole. Naturally this includes physical escape. Alcubierre drives, on the other hand, work by warping spacetime such that ...

0

Well, seeing how the event horizon is the area from where the escape velocity is equal to the speed of light; an alcubierre drive would indeed allow one to escape, by accelerating beyond escape velocity. The problem is that deeper into the hole, the velocity required increases quickly, and the increased mass in the gravity well makes 'warping' it take more ...

1

Spin it up until its angular momentum becomes sufficiently large that it becomes a naked, toroidal singularity, at which point the laws of physics metaphorically throw up their hands and shrug in confusion.

7

Feed the hole negative mass. Probably you have some negative matter around to power your Alcubierre drive. Load that into your little black hole. You will need a fair bit to make a difference. To my surprise, this is apparently a done thing in theoretical circles: adding negative mass to model the shrinking of a black hole via Hawking radiation. https:/...

4

For something that sounds plausible, but totally isn't Fire charged particles at relativistic speeds on tangents to the event horizon. And just before they cross the event horizon, slow them down to below relativistic speeds with bursts from powerful magnetic and electrical fields. As they near the black hole, their induced mass creates gravitation fields ...

4

I will assume you want something vaguely scientifically plausible. (I will also assume when you said "small black hole" you really meant one that is small enough to be contained on the surface of a planet and that the 4' size was not what you really meant.) To start with, you can't destroy black holes. You can -- with difficulty -- move them. You can feed ...

33

A black hole with a Schwarzschild radius of 4 feet would have a mass of 137.5 x Earth and the gravity to go along with it. Such a black hole would instantly liquefy the earth as it shreds it into an accretion disk and shoots gamma rays straight through the earth's poles. There would be approximately 0 seconds for a committee to consider the problem before ...

3

A black hole with an event horizon circumference of ~13 feet (circumference because diameter is meaningless in a region of space so deeply curved) would mass far more than the Earth. The surface gravity of an Earth-sized planet with such a body at its core would be well beyond survivability of any land animal less tough than a small spider or insect (though ...

10

How close you pass to the black hole is almost completely irrelevant. The galaxy is only 100,000 ly across, and the Earth is only about 25,000 ly from the center. If the aliens are coming from a direction diametrically opposite the Earth across the galactic core, only 75,000 ly of their 66 million ly journey will even be within our galaxy, let alone near the ...

2

I don't have a solution; what I do have is a possible path to a numerical solution. For the sake of simplicity and sanity, I will consider the special case of a non-rotating, chargeless, spherically symmetric black hole. This black hole causes space to take a shape described by the Schwarzschild metric. A small test particle - which in this case can be our ...

11

All black holes are theoretically predicted to emit Hawking radiation due to quantum effects, and the black hole's luminosity (the total power of the radiation it's emitting) depends only on its mass, the smaller the mass the greater the luminosity. There is a calculator on this page which allows you to enter in one parameter for a black hole like mass, and ...

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