Mini black holes could be a source of energy - Stephen Hawking

[Moreno]

An artificially created mini black holes could be huge source of energy for entire humanity - Stephen Hawking claims.

http://www.express.co.uk/news/science/640496/End-of-the-world-Stephen-Hawking-black-hole-could-destroy-us

 

Why does he believe that creation of such black holes will consume smaller amount of energy than what they would be able to provide later?

Edited April 6, 2016 by Moreno

[Strange]

I don't think he says that. His suggestion is that if we could find such a black hole, then we could harness the radiation from it as a source of energy. Clearly, to create a black hole would take at least as much energy as you would ever get out of it. (But creating one is even further beyond our capabilities than safely harnessing one we found.)

[MigL]

Works in Romulan battle cruisers.

[Daecon]

How long would such a black hole last before it evaporates? Would the power output increase as time goes on?

[Mordred]

The evaperation time is roughly proportional the cube of its mass.

 

[latex]T_ev=\frac{c^2M_o^3}{3}[/latex].

 

Assuming the blackbody temperature of the BH is greater than the blackbody temperature of its surroundings.

 

Further details here.

 

https://en.m.wikipedia.org/wiki/Hawking_radiation

One of the examples they give is in order for a BH to evaperate with the blackbody temperature of the Universe it must have mass less than 0.8% the mass of the Earth

Edited April 7, 2016 by Mordred

[imatfaal]

For all your black hole needs

 

http://xaonon.dyndns.org/hawking/

 

Change one variable and watch the changes ripple through the others. Small black holes are nasty, hot, and short-lived once you get to the confinement and energy-farming size

 

 

A trillion tonnes might work - still a hundred million kelvin, lasts practically forever, small enough to be lost on a pinhead.

 

Oh Yeah - forgot to mention the downside; I produce can more power on my pushbike.

[Endy0816]

Infalling mass could work too.

 

Just having a smallish stable one would give us some decent options though. Waste disposal. Swiping energy from rotation.

[Mordred]

For all your black hole needs

 

http://xaonon.dyndns.org/hawking/

.

Nice link A guy can have fun playing around with that calculator.

[Strange]

Nice link A guy can have fun playing around with that calculator.

 

Sad but true.