What is preventing microscopic black holes from causing a person to implode?

Question

The theroy I've heard is black holes are more common and some can be microscopic. If that is true, what prevents them from collapsing a person? I'm not trying to be dumb, I just don't understand how this can be.

Answer 1

Mr. Zwick is close, but its not an infinite amount of matter. Any amount of matter, when packed together tightly enough will produce a black hole.

Density=Mass/Volume

As volume approaches zero, the density approaches infinity - no matter how much mass is present. Density determines whether there is an event horizon and a singularity - ie - is it a black hole

However, the gravitational force of a black hole (or any body) is a function of its mass alone. The lifespan (see below) and strength of the gravity field is determined by overall mass.

Thus, you can have a mass at infinite density without it having sufficient gravity to pull much at all in. True, if given enough time, the blackhole will continue to consume and thus will eventually grow big, increase its gravitational field and be able to stretch its reach further. However, black holes don't live forever.

So here's the answer to your question as the best models explain it so far - according to Stephen Hawkings, black holes evaporate through a process called Hawkings Radiation. This is sort of like a black hole evaporating through quantum parity interactions.

With a microscopic black hole, the evaporation happens faster than its gravity is strong so its loosing mass faster than its gaining new mass. Its gravity isn't strong enough to overcome the other forces acting on its potential victims.

Atoms produce their own gravity field for instance, but since they are so small, the electro magnetic force at that scale is far more powerful. Likewise, inside the nucleus, you'd think the electro magnetic force between the protons would cause them to repel. They would, at larger scales, but when you get that small, the strong nuclear force is more powerful.

Gravity is the weakest of all the forces (assuming Einstein is wrong and that gravity IS a force afterall).

Gravity is weaker than the electromagnetic force - that's why you don't fall through the sidewalk but rather walk on top of it.

Electromagnetism is weaker than the weak nuclear force - that's why atomic the atomic nucleus can break down and give off alpha and beta particles.

The weak nuclear force is weaker than the strong nuclear force - that's why the nucleus stays intact rather than the neutrons all decaying.

The larger you get, the less impact a force has - gravity is weak, but acts over long distances, the strong is strong but acts over short distances.

Answer 2

Most all black holes are pretty big.

There might be small ones, but nobody has seen one yet.
... or detected them.

So the reason people are not gobbled up by microscopic black holes, is because there aren't any around us.

If they're really small, they might not have any more mass than the average mountain, and wouldn't bother anybody more than that mountain. People living on mountains aren't bothered by the gravity from the mountain, are they?

And the ones scientists are looking for? They're the size of a small atom, and wouldn't harm you more than getting a X-ray would.

Answer 3

A black hollow of a lot less mass than the earth would absolutely be "fed on" by the Earth. A "microscopic" black hollow would have in effortless words a really small mass, and *no longer* be in a position to distort area-time sufficient to smash an merchandise with more suitable mass, like the Earth. A microscopic black hollow is pick to "evaporate" very without delay, leaving in effortless words a touch "Hawking radiation" in its wake.

Answer 4

all black holes are microscopic...

they are an infinate amount of matter in one single point (infinate density)

if there was a microscopic black hole anywhere near earth, beleive me, youd notice. the earth would be guzzled up and dissapear in the event horizon before you can say hottentottententententoonstelling.

a black hole would not limit itself to one person. it would guzzle up the entire solar system at the very least.