Originally posted by Andrew HamiltonOne thing I like about the idea of DC grids is less radio interference and it would be presumably more efficient for the simple reason: a 5000 Km 50 or 60 Hz transmission line starts to look more like an antenna.
This explains how a continent-wide dc electric grid can allow us to generate all our electric energy from renewable energy ( this can be done within perhaps 30 years according to one conservative estimate mentioned in the origi ...[text shortened]... icians would actually make this happen or simply do nothing as usual is another matter entirely.
Originally posted by KazetNagorraPretty good bet, that. What comes out of the labs and what comes out of commercial production are often two different things, also years after the lab results.
Maybe. Even if one is found, it will probably be expensive to make, so copper wires will probably be around for a while.
Originally posted by sonhouseshouldn’t that be “It's the holy grail of superconductor research”?
It's the holy grail of physics.
Originally posted by Andrew HamiltonWell, maybe the holy grail of APPLIED physics then. Unification would be a bit more fundamental for sure. The thing is about unification, we have no idea what kind of new technologies that would lead to, probably something we can't even imagine right now, but room temp supercoductors? That would change everything in all aspects of electronics, heating and cooling, transportation, space travel (especially when we get to the point where we can make a working space elevator), computers, mobile devices, MRI's, levitating trains, energy transport, energy storage, radio communications(imagine superconducting antenna's, the Q would be in the millions so the same range of radio's of all kinds could be done with maybe 100 times less energy and reduced bandwidth, the antenna itself being a bandwidth pre-selector, imagine what that would do for radio astronomy), the list goes on and on what RTS's would do.
shouldn’t that be “It's the holy grail of superconductor research”?
I assume that the “holy grail of physics” is the unification of all the known laws of physics into one single law? (I could be wrong -“holy grail" is ill-defined)
Originally posted by sonhousePoint taken
Well, maybe the holy grail of APPLIED physics then. Unification would be a bit more fundamental for sure. The thing is about unification, we have no idea what kind of new technologies that would lead to, probably something we can't even imagine right now, but room temp supercoductors? That would change everything in all aspects of electronics, heating and c ...[text shortened]... agine what that would do for radio astronomy), the list goes on and on what RTS's would do.
Originally posted by sonhouseI got just this one:
Originally posted by Andrew HamiltonIf you dig deeper into that link, there are '3d' simulations of the structure which looks like it makes more sense.
I got just this one:
“…In theory, metallic nanotubes can carry an electrical current density of 4×109 A/cm2 which is more than 1,000 times greater than metals such as copper…”
By accident, I found this while I was searching for the above:
It is about a form of carbon called “lonsdaleite”
http: ...[text shortened]... ipedia.org/wiki/File:Lonsdaleite_structure.PNG
Does anyone else find this visually confusing?
Originally posted by Andrew HamiltonI don't see why it should be only "in theory". There must be some way to create a pure sample and if so it should be as hard as predicted by the theory.
“…the lower hardness of lonsdaleite is chiefly attributed to impurities and imperfections in the naturally occurring material, and a pure sample could be 58% harder than diamond.…”
I assume that this is only “in theory”?