Try this:
sudo su
It has the advantage that you can now type suspend and be back at your regular non-priv user; fg will take you back to root.
Meanwhile, a 15 khz tone on a CD has three samples per crest. With three samples there is no way to diffrentiate between a sine wave, a square wave, or a sawtooth wave; all will sound exactly the same.
And you, having listened to those 15 kHz sine, square, and sawtooth waves recorded on LP can distinguish them, right?
Stay in school, son.
I'm not exactly sure what weaponry would be able to hit a target at 20,000 feet but it's a big, slow-moving target.
An honest-to-god SAM can probably hit one, but they don't have a lot of those in Afghanistan. Shoulder-mounted missiles won't go that high.
It will be approximately the same size in the sky as an airliner at cruising altitude. If there were no contrail and no sound, would you be able to see a 747 crusing above you? Paint it the colour of the sky as seen from the ground -- would you even know this thing was a few miles above you?
It may be slow-moving, but that also means no heat signature for an IR-seeker to lock on to. It's a large plastic bag, so it wouldn't be too hard to give the ship a very small radar cross-section. Best of all, it can be unmanned, so even if by some lucky chance the bad guys manage to shoot one down, big deal.
Not as designed, they couldn't.
Perimeter first required the human leadership to put it in an "alert" mode. Then it required that human leadership to drop out of communication. Finally, it required an actual human being (albeit a low ranking one) to actually push the button.
A simple surprise detonation on Russian soil would not do it.
Since when is going along with excessive taxation being patriotic?
Damn right, citizen! But when I say my taxes are excessive they throw me in jail as a tax evader. Don't they undeerstand I'm a patriot?
Until we can throw corporations in jail when they commit crimes, or execute them for murder, bullshit like this is just empty rhetoric.
"Cheaper" is just another word for exploitation. I think you're the one displaying hatred -- why do you think that workers in other countries don't deserve the rights, benefits and salaries that you get? I got mine, fuck the rest!
How's this: companies can outsource to people from these "shithole countries" to reduce their costs as long as they also reduce their salaries and bonuses to what execs in that country get.
We as a society need to remember that corporations exist at the pleasure of society, and must not be allowed to destroy society to make a buck.
Some back-of-the-envelope calculations: normal human speech is about 60dB. We know dB = 10 log(I/I0) where I0 is 10^-12 W/m^2. So 60dB works out to about 10^-6 W/m^2 -- that's a microwatt per square meter. With 100% efficiency and a mike of 1 cm^2 collecting area, that's around 10^-10 W -- 0.1 nano-watts.
Color me skeptical.
What does it mean to "truly" understand something? (I would claim that we "truly" understand nothing -- we don't even understand ourselves.)
That's not how science works. You observe reality, you come up with a mathematical model (a hypothesis or theory) that fits the observations, and you test your hypothesis by making predictions and seeing if your hypothesis still looks good. Individual people may say things about what they feel they understand, but not being them, you don't know what their experience of "understanding" is.
GR and QM have been fantastically accurate models, much better than anything else we've ever come up with. Consequences of QM and GR once thought to be outlandish and obviously wrong have been shown to be fact -- repeatedly. That your mind can't admit these concepts means nothing.
Perhaps English is not your first language, but "I have little sympathy for fools and Republicans" means that I have no sympathy for them. "I have a little money" means I do have some money, just not a lot.
(Incidentally, there's plenty of evidence for dark matter.)
If you want to put yourself on the map, publish your own map.