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seen Apr 18 '13 at 11:44

AKA Spacelike Cadet.


Nov
18
awarded  Yearling
Oct
25
awarded  Nice Answer
Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
Nov
18
awarded  Yearling
Aug
23
awarded  Revival
Apr
15
comment Can the lightning be captured and used as power source?
8kWh seems like an underestimate. I've seen 5GJ or let's say 1000kWh. (Also, I guess lightning would be renewable energy :-) Where I live, that can sell for a hefty premium, e.g. solar gets 54.9 cents/kWh where nuclear gets 5.6 ...)
Apr
15
revised Why is a black hole black?
previous edit changes the meaning of the question, see Ron Maimon's comment and OP's reply
Apr
15
suggested approved edit on Why is a black hole black?
Apr
15
comment A man running on the treadmill
I'm not totally sure what you're asking here. But maybe it would help to point out that when the treadmill is stopping, it is not an inertial frame of reference. The first law would not apply. For example, the ant on the treadmill would feel a jolt.
Apr
11
comment Mass defect- From where mass is being lost?
Am I correct in rephrasing your question like this: if nucleons lose mass when they bind together (yes, they do), then, why doesn't that mean that there are many different types of protons and neutrons, classified by their mass?
Apr
11
comment Is Newtonian gravity consistent with an infinite universe?
See also: "Paradox with Gauss' law when space is uniformly charged everywhere", which is the same thing with electric charge.
Apr
11
comment If the moon was rapid enough would it be able to orbit the earth from a close distance?
To answer the other part of the question: a person on the near side of the moon would levitate. The Roche limit quoted in this answer is, in fact, the balance point, where a person on the surface of the moon would be exactly weightless (assuming the moon stayed spherical).
Apr
11
revised Paradox with Gauss' law when space is uniformly charged everywhere
more descriptive title
Apr
11
comment Solar Catastrophe
I think this was answered under "The speed of gravity?".
Apr
11
suggested approved edit on Paradox with Gauss' law when space is uniformly charged everywhere
Apr
10
comment Do semiclassical GR and charge quantisation imply magnetic monopoles?
@Dilaton - I am reading it quite differently from you then. They are not talking about the expectation due to some standard duality argument (which is well covered in other questions on this site), but necessity due to some thought experiment(s) specifically involving black holes. (Yes, I for one would appreciate hearing from Ron Maimon.)
Apr
10
comment Do semiclassical GR and charge quantisation imply magnetic monopoles?
@Dilaton: I'm asking about GR or semiclassical extensions thereof -- and judging from the linked claims, I think this extension is really only needed for Hawking radiation. I don't think S-duality is relevant here, though I could be missing something.
Apr
5
comment Is it possible to separate the poles of a magnet?
@RonMaimon: if you're still around perhaps you might chime in on "Do semiclassical GR and charge quantisation imply magnetic monopoles?"
Apr
5
asked Do semiclassical GR and charge quantisation imply magnetic monopoles?