thsksbd

43 ms·

721.
by thsksbd 3y ago
Perfluorinated chemistry is very nasty and not benign at all. The issue is not teflon, or similar plastics, but byproducts and precursors of their manufacture. They're chemically super-stable (since, like teflon, they are perflorinated
722.
by thsksbd 3y ago
I need a clarification: You know a medical doctor who left medicine and is working as a prostitute because it pays more? What country if you don't mind me asking?
723.
by thsksbd 3y ago
You mean misinformation like the Hunter laptop story, the Wuhan lab origin - both censored and true - or do you mean Russia gate (throughly discredited, but shoved down the electorate's throat for four years?
724.
by thsksbd 3y ago
Its not Big Tech thats getting sued, its the executive branch of the government. Big Tech did its bro-thing and they're cool - they're getting away with it. The WH, however, cannot do what they did and they're getting hammere
725.
by thsksbd 3y ago
If you have an apple card, just change your number.
726.
by thsksbd 3y ago
Naw. Every office in the world has a water dispenser misnamed "cooler". Ive only ever seen water coolers in the US, mainly in the South, and they're loud
727.
by thsksbd 3y ago
Where do you live (general area) that you get -40 C often enough for it to matter? Do you mean real -40? Or wind chill "-40" which doesnt affect HP? Edit: Edmonton?
728.
by thsksbd 3y ago
The paper is from 2020. My understanding is that composite testing is still in its infancy. Also note that the hull was 5 inches thick (safety factor > 2.5). Depending on the dispersion properties of the medium ultrasound might not penet
729.
by thsksbd 3y ago
To some extent. "Mistakes were made" as they say. But its a lot more nuanced than that. Metal fatigue is understood because we have a mechanistic understanding of what it is, how fatigue accumulates, and how different metal crysta
730.
by thsksbd 3y ago
We dont even know what consciousness is, or how to define it, but somehow we know thousands of species has it. Personally, I like EW Schumacher's definition (a guide to the perplexed): animals are conscious because they can be knocked
731.
by thsksbd 3y ago
Commercial airplanes have only recently used composite wings, under large regulatory suspicion and are used in a far more benign environment than 4000 m of water head. I really dont think ppl appreciate what 4000 m of water means! 1 atmosph
732.
by thsksbd 3y ago
Composite failure is very hard to predict and hard to evaluate. By comparison metal fatigue is very well understood. Compression loads on submarines are extreme and cyclical. This causes the fibers to delaminate loosing strength. Furthermor
733.
by thsksbd 3y ago
We made a caricature of men and we've grown to believe it.
734.
by thsksbd 3y ago
Thats a very, post-industrial revolution view of history. By comparison in my wife's "backwards" country, the female relatives of the woman in labor are traditionally not allowed to attend labor. Sure, the men weren't
735.
by thsksbd 3y ago
I believe it.
736.
by thsksbd 3y ago
I got stuck at dca last week. Drive back. Check w/ hertz
737.
by thsksbd 3y ago
Presumably the "42" refers to the birth year.
738.
by thsksbd 3y ago
Because its nasty stuff! switching off a low Z 200V DC carrying 20 A in an emergency is not trivial. AC arcs self extinguish every 100 or 120 Hz.
739.
by thsksbd 3y ago
Anything with a motor will get a lot more expensive. AC motors are dirt cheap. Also safety is harder on DC. For one the relays must be made much larger to withstand the nasty arcing. Arc extinguishing is much harder too. Efficiency is a tos
740.
by thsksbd 3y ago
I thought subs have strict weight requirements. Which makes sense since their buoyancy is, to a first order approx, like a blimp's (ie a hot air balloon's with lift surfaces)
741.
by thsksbd 3y ago
at nanoscale many (all?) iron oxides become super-paramagnetic. If anything, they're even more attracted to magnetic fields.
742.
by thsksbd 3y ago
Stars cant use Fe's chemical energy because they're too hot and the entropy of not being bound to O2 is too high. (And Fe is a trace element). No one is talking about using Fe as fuel in a nuclear reactor, or (even though the ar
743.
by thsksbd 3y ago
There's the kinetics of oxygen transport into a big pile of iron powder. If that's not good enough, you can always transport it in a closed container with a block of dry ice. You don't even have to seal it, just change the ch
744.
by thsksbd 3y ago
iron oxide magnetic properties depend on its oxidation state, temperature and particle size.
745.
by thsksbd 3y ago
Safety is why vehicles have gotten so big. In a collision, all else being equal, you always want to be in the bigger car. Its literally grade 10 physics. But we can have our cake and eat it too. Safer, environmentally sound vehicles and as
746.
by thsksbd 3y ago
The F150 has an aluminum chassis and some configurations weighs less than the lightest Tesla S.
747.
by thsksbd 3y ago
Because, legally, you're stealing water from the basin and the basin's down stream users. You're also not paying for the sewer use if you flush with it (since sewer isn't metered)
748.
by thsksbd 3y ago
Agreed, especially in water limited areas, but there's a reason it is used. potable water has very well defined properties. Its has a low salt concentration, pretty well known (and diminishing) chloride concentration, and known hardnes
749.
by thsksbd 3y ago
Yesterday I had water in DC. A five hour drive with no stops later, I relieved my self. I changed the tilt of the Earth. Are our instruments sensitive to measure this? No. Are our insanely accurate instruments able to measure other human
750.
by thsksbd 3y ago
Ppl really need to look at the HM history and use the search function to look at disease stories from late '19 early '20. The story was already leaking in December, January

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