hwillis

32 ms·

331.
by hwillis 3y ago
Kinda. The Human Genome Project's reference genome is from 4 people. 70% of it is from one person, because that sample happened to be very good.
332.
by hwillis 3y ago
...yes. Like preventing blind people from driving.
333.
by hwillis 3y ago
> The Immigration Reform and Control Act of 1986 (IRCA) makes it illegal for an employer to discriminate with respect to hiring, firing, or recruitment or referral for a fee, based upon an individual's citizenship or immigration sta
334.
by hwillis 3y ago
> a resistor was, like today, about $0.05. Sourcing on that, for no particular reason (also, since 1965 the dollar has inflated by ~10x): Through-hole types that would have been used for this are around .5-1 cents in 5k quantities, and ~
335.
by hwillis 3y ago
> For me the most important point is "It's a distraction". How?? There's already a screen or at least dials in the same spot (I have my phone mount center bars). I'm not some bird, having my vision distracted b
336.
by hwillis 3y ago
Heavy upvote. Reading street signs is a distraction. For me, even just stressing about finding a road -here in boston, a missed turn can mean a 30 minute delay- is a major distraction. Nobody is reading texts on a motorcycle. Well, except
337.
by hwillis 3y ago
Well, for the outside layer only, since the inside layers are effectively just shifting slightly. The battery as a whole swells slightly due to the stress of intercalation, which is certainly a much larger effect.
338.
by hwillis 3y ago
No- the inside of a li-ion battery looks like this: https://www.researchgate.net/profile/Jigang-Zhou/publication... Li-ion battery comes off the production line as one continuous, miles-long tape that is rolled in
339.
by hwillis 3y ago
Most/all of the capacitors (which are mostly piezoelectric), the inductors, any ferrite beads, and of course thermal expansion. I'd also bet that liquid crystals change pressure when they rotate, but idk.
340.
by hwillis 3y ago
Well, side-to-side as in less than 100 microns. The inside of the battery is a very long tape that is rolled up like folded paper. The tape is: 1: Aluminum foil (about 1/10th as thick as household foil) 2: Cathode material (metal oxi
341.
by hwillis 3y ago
No, I'm pretty sure they're just saying she should have known better. Vice were the ones who outed Naomi.
342.
by hwillis 3y ago
That's awesome! Glad it's a priority.
343.
by hwillis 3y ago
Yes, 92% of Nd magnets are made in China. Large amounts of the REE used to make those magnets are imported. The implication that all that mining is just in China is false, and cheap labor is the only reason it isn't all in the US. T
344.
by hwillis 3y ago
Yes, absolutely. There's almost as much lithium as lead, and 10x as much lead in an ICE car battery than an EV lithium battery.
345.
by hwillis 3y ago
> haphazard disposal processes that are common where these rare earths are Which rare earths are those? Because there's only one rare earth in motors and zero in batteries. There are rare earths in most electronics, but not really
346.
by hwillis 3y ago
That's not the same thing. A town in the middle of nowhere Appalachia is much more remote than sparse suburbs twenty miles from a city. Hell, you might find higher density in some remote towns than eg Farmville Iowa. Plus, dependin
347.
by hwillis 3y ago
> But most of the stuff in my home doesn't need high voltage - it's all running at 5V or 12V. 85 volt DC carries the same power as 120 volt AC, but 85 volts DC is essentially safe to touch. The human body has a much lower AC im
348.
by hwillis 3y ago
NordLink flows 1400 MW. Wholesale electricity in Germany is roughly $105. 365x24x(1400x.07)x105 = $90 million per year. Adds up to the cost of the total project every 17-22 years. Over 20 years it's $1.8 million per km. If the supe
349.
by hwillis 3y ago
Even if it were $250, that's a pretty high cost relative to the annual cost of insurance. It's too high to justify as a routine diagnostic tool. The financial benefit here is that earlier identification would save money in the l
350.
by hwillis 3y ago
You can't get CT scans very often, because they hit you with large doses of ionizing radiation. Ultrasounds are low-resolution spotlights; you shine them at a particular spot to diagnose something specific. With this you could get an
351.
by hwillis 3y ago
1D just means it conducts in one direction. Like it's got tiny wires in it. It's not particularly unusual; anisotropic conductive adhesive is used in your cellphone to glue the screen on. They tape over the electrical pads, then
352.
by hwillis 3y ago
No it isn't. This is just like putting a filter at the bottom of a dam, except the filter also blocks salt. The top of the dam is at sea level, so you have to bring the water back up to the surface.
353.
by hwillis 3y ago
Pressure (N/m^2) times volumetric flow (m^3/s) equals power (N-m/s). At 231 meters the pressure is ~340 psi or ~6.3 MPa. 1 liter would take ~6.3 kJ to pump.
354.
by hwillis 3y ago
If you had a 231 meter dam, with a membrane filter at the bottom, fresh water will come out at atmospheric pressure. It then has to be carried back up to sea level. You could power that pump with another hole in the dam, but then the non-
355.
by hwillis 3y ago
> You could have said the same of Industrial Revolution. Says who? What jobs did the industrial revolution eliminate? Essentially just spinners and weavers, and that caused a violent social uprising by the Luddites. Textiles were far o
356.
by hwillis 3y ago
Yeah pretty sure they're referring to Russia's army being so pathetic
357.
by hwillis 3y ago
The Botox-like family are the most potent substances by weight, whether they're used for medication or poison. It's kind of crazy when you consider it. It takes thousands of botox doses to kill you. That's not dissimilar
358.
by hwillis 3y ago
> paint onto the outside of a vacuum flask, and have it be sucked into any gaps and solidify there. Stuff like paint will tend to be very permeable- if it relies on a solvent drying out, then obviously its permeable enough to let the sol
359.
by hwillis 3y ago
Not even- Teflon breakdown is a much smaller source, you just happen to maybe eat it. PFAS have been phased out of use already. These chemicals were put into basically everything, like asbestos was. Cleaning products, spray grease, fabrics
360.
by hwillis 3y ago
That's not the issue. These chemicals -they're not just teflon- were put into basically everything, like asbestos was. Cleaning products, spray grease, fabrics, paper, shampoo and cosmetics, stain-resistant coatings. They'

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