On 2/26/2012 15:20, clipka wrote:
> The movement due to gravity may instead be a result of quantum fluctuations
> in the position of the object, which favor positions with lower potential
> energy.

That's kind of a non-answer, tho, given that the potential energy is indeed 
mass.

> Actually that's the one weak point of all the portal stuff: Rather than
> allowing objects to fall through without a change in speed, a real working
> portal technology would have to result in a repelling force at the lower
> portal itself, proportional to the difference in potential energy.

Unless you're assuming the power is not coming from the gun itself. I would 
think anything powered by a black hole could probably generate as much power 
as it needs to via hawking radiation. Certainly as much power as we've seen 
it use.

-- 
Darren New, San Diego CA, USA (PST)
   People tell me I am the counter-example.

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