If you do any kind of shop work--woodwork, metal, etc--GET ONE!
There are add-ons to an existing shop-vac. Dirt collects in a bucket under the cyclone, leaving the shop-vac filter almost completely clean. I haven't replaced mine in almost a year.
2/ Mine's fairly cheap, but works well on stale horse feed, sawdust, metal grindings from welding projects and more.
It even separates fine agricultural lime dust.
No idea how energy efficient it is; I have the usual 'FIVE PEAK HP!!1!" Rigid shop-vac
Unless you have (5 * 750)/120 = 31 amp outlets, standard 15 amp outlet produces just over 2HP (assuming 100% efficient motor)
(1HP ~ 750W)
4/ I'm thinking of 3D printing a fancier one from ABS plastic...but I like the clear one I bought.
It's really satisfying watching sawdust get spun out of the intense tornado in the funnel and drop into the bucket.
5/ Yup. Breakers allow for brief high start-up current, so maybe for 1-2 60Hz cycles it's making "five hp"
They're like crappy car audio amp ratings: possible only in liquid nitrogen with 24V input for the few milliseconds before the output transistors fry.
@AetherCzar 2/
A million+ volts and about 50,000 amps of current.
Very briefly, a few milliseconds, it's making as much power as 20 nuclear generators!
I'd read that the "bremstralling" (when charged particles slam to a stop and emit and emit radiation) makes x-rays from lightning...
@AetherCzar 3/ @AetherCzar informed me the energies in lightning are so high, it's past x-rays and emits gamma!
Anyway: those bursts of ionizing radiation create the conductive channels in the air, that propagate the strike.
2/ Atheism isn't more intellectual; as they've tried and failed to label themselves "Brights" (like "gay" was co-opted)
Scientists with faith (consciously or not) believe the universe is rational, and was created by a rational Mind...
3/ ...the same Mind that created Man in His image.
Thus we should be able to comprehend it, at least in some small part.
Luminaries of science, like James Maxwell (whose elegant equations describe EM radiation), were men of deep Christian faith. Isaac Newton. Einstein, Jewish.