physics stuff
"Hallitubes" - high-speed transit system with terrorist-resistant features proposed.
SAN DIEGO, Calif. A grassroots anti-congestion initiative headed by Attorney Greg Maizlish advocates rider-agility-based electric vehicle commuting through thin, low-elevated tubes. Twenty other referendum measures combat road delays with new technologies as part of a California Proposition plan.
a body through it w.o. overheating, and without the friction being too strong for the rider to hold on ? This scheme is advocated, with images, at http://www.generaltransit.com (check INOVETA) toward middle of page. Based on futurama tubes I guess..
I would like to hear people giving their vision of the future of the research on turbulence. Appartently it is an exteremely long way to go. Is it so? Experiments become better and better, DNS is well resolved (at least their grid is increasing exponentially) and LES/RANS/Modelling field still attracts funding. But what about the progress? What do we understand better than before?
It is a known fact that the rotation of the Earth is gradually slowing. For four and one half billion years, its entire life, it has been slowing down. As the Earth loses its kinetic energy due to all forms of friction acting on it (tides, galactic space dust, solar wind, etc.) like any other flywheel, it will slow down.
Over its lifetime the Earth's rotation has slowed significantly but even at the Earth's present subdued rate of rotation, at the equator, the rotation is still fast enough to help propel rockets into space with up to 13 percent less fuel, which allows heavier payloads. Just imagine the heavy payloads that could have been launced in the past when the planet was spinning much faster.
"The Sea Launch Company" currently launches its commercial satellite delivery missions from a floating platform at the equator (0 degrees N Latitude 154 degrees W Longitude). The rocket is able to carry heavier payloads into Earth orbit by taking maximum advantage of greater angular momentum at the equatorial region of the planet.
Donald L. Hamilton
http://www.novan.com/earth.htm
Evolution: Darwin discovered it. How it came into being is a matter of speculation.
Evolution is just one of the "Laws of Nature". It is the means that
Nature uses to create the millions of diversified life forms. The "Laws
Mathematical Invalidity of the Lorentz Transformation
Abstract
Mathematical procedure by which Lorentz transformation is derived is
incorrect. The transformation is an imaginary "solution" to a set of
So from what I understand, Hawking radiation comes out of black holes as they eat up matter. BUt here's my question: Does it account for all the matter they absorb? I seem to recall a lecture where Hawking himself suggested matter sucked into the maw may reemerge (failry well discombobulated) in an alternate universe, and that that may be where new stars come from.
Thoughts, anyone?
Noticed a new show on TV this past Sunday called Numbers. The show was about an FBI agent with a brother that was a physics/math genius. The "genius" used mathematical calculations to pinpoint the whereabouts of criminals. I did not get to see the entire show, but found it fairly entertaining even though it was laced with many out of context quotes from works by Hawking and I believe I even discerned some dialogue from "The Elegant Universe".
Noticed a new show on TV this past Sunday called Numbers. The show was about an FBI agent with a brother that was a physics/math genius. The "genius" used mathematical calculations to pinpoint the whereabouts of criminals. I did not get to see the entire show, but found it fairly entertaining even though it was laced with many out of context quotes from works by Hawking and I believe I even discerned some dialogue from "The Elegant Universe".
