Re: Blackhole Engines, again.



Wayne Throop wrote:

It does? What happens "just before it evaporates" is that its
power output increases, and it blows through it's last many-many-many
tons of mass in a microsecond. So, basically, it's not the only thing
that's going to be "evaporating" in them there parts.

My "just before it evaporates," I didn't mean you let it evaporate in your engine/drive/whatever, you get rid of it before it does.

The Hawking radiation curve goes up and down as much as you want. Even when a primordial black hole would be emitting radiation at an extremely copious rate, mass still has an awful lot of intrinsic energy. Such a black hole does not need to be anywhere near evaporation to still emit huge amounts of energy.

Take a black hole that emits Hawking radiation at a rate of 10 TW -- that's on the order of the total power consumption of the human species today. Such a black hole would have a mass of about six million tones, and would have a remaining lifetime of over a half a million _years_. You're going to have plenty of time to get rid of the thing before it blows, to say the least.

--
Erik Max Francis && max@xxxxxxxxxxx && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
No one should have to dance backward all their lives.
-- Jill Ruckelshaus
.



Relevant Pages

  • Re: White Holes are time-reversed black holes?
    ... Hawking radiation is not, and never has been, the "dominant model" ... for "powerful emission sources in the universe". ... (Source: "Particle emission rates from a black hole: Massless ... The total power emission from a stellar mass black hole, ...
    (sci.physics.research)
  • Re: If my hypothesis were wrong, Hawking radiation would make no sense
    ... proportional to its inertial mass. ... And Hawking radiation can be explained by the presence of virtual ... particle-anti particle pairs near the event horizon of the black hole ... the black hole wouldn't lose mass, ...
    (sci.physics)
  • Re: Blackhole Engines, again.
    ... power output increases, and it blows through it's last many-many-many ... that's going to be "evaporating" in them there parts. ... when a primordial black hole would be emitting radiation at an extremely ... mass still has an awful lot of intrinsic energy. ...
    (rec.arts.sf.science)
  • Re: No more talk of black holes, please!!
    ... The outward pressure created from energy ... This is what astronomers call a black hole. ... It's called Hawking radiation these days. ... "The existence of a small black hole of this mass is purely hypothetical ...
    (uk.people.support.depression)
  • Re: New rbr Science Officer
    ... Am I correct in assuming we can't observe "Hawking Radiation" because ... The math works out that for a larger mass black hole, ...
    (rec.bicycles.racing)