Sadly, the escape velocity of our galaxy is an order of magnitude higher than the manhole cover's velocity. And even at that speed it wouldn't hit with nearly enough energy to cause a mass extinction. Still a fun idea though. :)
Do I have to ensure I'm still born? If not, I choose the last common ancestor of modern humans. We've screwed things up enough that I think the world would clearly be better off without us.
My guess would be that the hypertonicity of the salt water causes water to move out of your nose's tissues through osmosis, reducing swelling, while the water clears out the mucus and stuff clogging it up.
Technically speaking with enough power you'd start burning yourself, which would probably increase your risk of cancer. Of course the radiation from your laptop is orders of magnitude below what is required to cause burns, and so any that happens to be absorbed by your body is dissipated harmlessly as heat.
Better yet, I'm buying an oxygen mask and several layers of winter clothes and going to Titan. Can probably walk around for a few minutes before freezing to death!
That's pretty much been my experience too. I've messed around with it a bit, but put no effort into finding actual uses for it. And I don't really feel like doing so because it all seems like a big cash grab. I'm glad some people find it useful though.
Is it time consuming though? You could probably feed it through a cutting jig at tens of centimeters per second or more, and as the other commenter said you have to cut the cables into small pieces anyways for the microwave processing.
Not really. A word with every meaning is meaningless itself, since it doesn't allow you to narrow down the word's intended meaning from the set of all possible meanings.
Too mathematically correct, 0.9 = 1 too if you feel like it. Heck, 0.8 is close enough that it's probably alright.