"Pick up any math paper on number theory, and you're bound to find the sentence 'Let p be an odd prime number.' without citation, but that would hardly qualify as plagiarism."
I wonder how often you see specifically an odd prime number... since two is the only even prime, its really the oddest of the bunch.
Hydrogen will always lose out, because it's simply an energy store and not an energy source. Anyplace we can get hydrogen from? No. We have to convert natural gas to hydrogen (might as well run vehicles on natural gas) or crack H20 into hydrogen with electricity (which is horribly inefficient). Electricity is the end game.
If electric cars were the best solution (or energy efficiency was the only concern), we would be exclusively burn oil in more efficient power plants, and using that to charge batteries in cars... rather than converting crude to gasoline to fill up.
Could have sworn that XP was not available before Windows 2000 -- but what do I know...
Maybe the poster was thinking of "Whistler", which probably did exist in the late 90's...
I think they normally push them into an orbit that will degrade so that they'll burn up on reentry. That takes less energy than putting them on a trajectory that leaves Earth's orbit.
For those lofty orbits in prime real estate (think Geosynchronous), they do push satellites out further into a graveyard orbit. It would take about 1500 m/s deltav to deorbit from way up there, and only a fraction of that to just push it a little further out of the way.
still not good enough to count as a valid password at my company =P
They're never going to get us into mars, because there's simply no profit in it.
Oh really? Because to me, Phobos and Deimos (Mars' moons) are little more than a few trillion tons of metal, ceramics, volatiles and a few million tons of precious metals sitting in a nice stable orbit over Mars.
Yeah but shipping charges from Mars are a bitch
Some programming languages manage to absorb change, but withstand progress. -- Epigrams in Programming, ACM SIGPLAN Sept. 1982