I thought exactly the same thing when Google went IPO and the Investment Industry was pushing a stock price of $75. I convinced our investment club (remember those?) that they didn't have a business plan, had no obvious source of sufficient revenue to sustain the share valuation that was being discussed, and that we shouldn't buy in.

8 years later, it's above $600.

Ignoring the idiots responding to this...

You're absolutely right. Let's assume an LED running at an 20 ma of current. An LED can't be connected directly across 120V (well, actually it can, and is amusing in a small-firecracker way), so a dropping resistor is used to reduce the current flow through the LED when on to the 20 ma that the LED can take. The combination of the LED+resistor end up with 120V (ignoring half-wave rectification and RMS voltage values) across the pair, and 20 ma going through them, for a combined power of 2.4W.

The LED isn't drawing 2.4w (which, by the way, is a nice bright flashlight), but the lighting SYSTEM is. An 80% off-line switching supply could be built that provided the .06W that the LED is actually using, but your power strip would cost $10 more.

Did you just write

and

in the same sentence?

which comes out to roughly 30 (4 TB) hard drives a week, or maybe $6000. I don't think that's going to bankrupt a federal agency.

Sure, you've got to double or triple that to pay for backups and replication, but let's be real - disk storage is cheap these days.

You haven't been here in July or August, have you? Dewpoints are generally between 50 and 65 degrees F during those months (although, with an outdoor air temperature of 110F, the relative humidity is still low). Currently, we have a relative humidity of 9%, and a dewpoint of 25F, so it's pretty dry, but an evaporator operating below 25F will still condense water...

I haven't been following the recent reporting on this case; did somebody find some evidence between the time (as his girlfriend reported) this:
“He said this man was watching him, so he put his hoodie on,” she said. “He said he lost the man. I asked Trayvon to run, and he said he was going to walk fast. I told him to run but he said he was not going to run. Trayvon said, ‘What, are you following me for.’ And the man said, ‘What are you doing here.’ "

happened, and when Mr. Martin got shot?

I guess I have a hard time understanding how

I guess I got trolled...

And teaching about transubstantiation in Physics class.

You don't need to attack 2500 or 4600 cities, but the premise behind the number of warheads is that you WOULD want to attack all of the enemies warheads, and vice-versa. You don't want to leave your enemy with the ability to strike back.

The goal might be to hit America's 20 largest cities, or Russia's 20 largest cities, but the fact of doing so means that the attacked country is going to be unhappy, and will fire back in anger at your 200 largest cities. So, the intiator fires weapons at their 20 largest cities, all of their strategic bomber bases, any large warships (missile subs, carriers, etc), and as many missile silos as they can to reduce the reprisal factor.

To prevent all of their offensive weapons from being wiped out, each side has at least a portion of their arsenal on a hair-trigger, capable of being launched in the 30 minute window from enemy launch to impact, to maximize the reprisal they could take. .

That'll be quite difficult on the older, non-microprocessor based machines (say, the 1980 vintage minicomputers) where the "CPU" was a 6u or 7u drawer in a rack. /frank

Well, they're only 375 light-years away, so I'd say that if they had managed to exist for 13 000 000 000 years, they likelihood of them disappearing in the last 375 is pretty low. My bet is on "are".