This is actually pretty significant if you want to use speakers to listen to a game, for example, while you're watching it on your laptop.

It's not disruptive, but it'll help a bit. And yes, pharmacists are important. But do you need them for ALL orders? Even if you're doing a routine refill for a medication that you've been using for years. Or you're picking up an antibiotics prescription. I'm not saying that people should just buy antibiotics without prescription, I'm saying that there's no real need to involve pharmacists in these simple transactions.

Right now I need to go to a pharmacy, drop off my prescription (if it's not electronic), and then wait for somebody to count out pills into a box. And there must be a pharmacist present in case I have questions.

And all of this even if you're buying a pack of antibiotics for an ear infection.

Well, they definitely succeeded. It's just that everybody else on the Web now gets to use their recordings for AI training.

Just have one AI agent call another one.

I grew up under the (basically) Soviet education system. I can tell that it's waaaaay better than the average K-12.

One easy fix? Have a high stakes gaokao-style exam for the US students. SAT/ACT are about as tough as a wad of toilet paper.

The K-12 system in the US has failed. The conservative fix here is absolutely right: institute a voucher system, with the Federally guaranteed funding level, and let parents choose schools. With obvious allowances for students with special needs, rural areas, etc.

It's quite clear that regulation is getting nowhere fast. Even the milquetoast Common Core requirements resulted in a revolt from schools not able to teach even basic literacy.

You just need to lower down the windows. Easy.

The battery heater in BEVs does NOT use water-based coolants at all because of the risk in case it leaks. Instead, they use glycol. Tesla even has a sensor that will disable the HV battery if it detects a conductive liquid in the battery loop.

Let's get some chemistry to help!

On average, the rate of chemical reactions goes up by 2x for every 10C of temperature increase. If your battery is at -20C then it produces about 12 times less energy than at 15C. A typical car battery can produce about 300kW of power, so that still leaves you with 25kW (or 33 horse power). A typical battery is about 400kg for the cells themselves, and apparently the cells have specific heat capacity of 800 J/kg/C, so heating them at 25kW will require 448 seconds.

But heating the battery _improves_ the discharge rate, so you get a nice differential equation. If you solve it, the resulting time is around 240 seconds or 4 minutes.

In reality, modern EVs drive just fine in Midwestern weather without ANY pre-heating. You get very sluggish performance for the first ~10 minutes while the battery warms up, but the car is perfectly drivable.

This study is BS. I have a 2018 Model 3 with resistive heating, and I did many road trips in sub -20C conditions. Heating a cold-soaked battery from that temperature to 10C takes about 5kWh, or around 7% of the total capacity. You typically can do that on "shore power" while the car is plugged in but you can do that unplugged. After that the battery gets enough heating from its internal inefficiencies.

The major energy sink is actually heating the _cabin_. People tested driving a Tesla Model 3 at -20C without any heating, and the range is around 86% of the normal.

So the range impact has NOTHING to do with the "battery chemistry" or "fundamental problems with lithium". It's just a question of using more energy to drive a given distance. Good news is that it can be solved by just making the battery larger.

LOL. A simple EV drivetrain is easy. A modern EV? It's an engineering work of art, with specialized power electrics, electric motors with power density that is insane, etc.

A lot of complexity is not apparent to classic mechanical engineers, but it's no less real. If anything, it's the gasoline engines that require no real expertise anymore.

Semantics. The last years of Chinese schools are focused on gaokao. It's THE test in China, even though technically it's "just" a university entrance test. So pretty much everyone ends up taking it.

There's also Zhongkao which also will cause poor US snowflake students to become a gibbering mess if they had to take it.

The entire country of China. This is the university entrance exam ("high exam"). They also have a zhongkao ("middle exam") to get admitted into the high school.

That's why I mentioned gaokao. Look at its sample problems: https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.reddit.com%2Fr%2Fmath%2F... Notice a distinct lack of calculator problems and long division?