What do you mean “pushing for”?
Advising customers, providing discounted traffic and instances, defaulting to us-east-2 in the console for new accounts, etc.
Why is Amazon having to convince their users to use what should be automatic redundancy?
It's not the question of redundancy. It's the problem with customers just building everything in us-east-1, so it now dwarfs everything else.
For large failures that won't save you. Does Amazon have enough infrastructure to run all of the East instances on their West hardware? That's doubtful and if they tried it would degrade performance if not outright take down the West due to the load.
The replacement for us-east-1 is us-east-2. Amazon has been pushing companies to use it for quite a while. They even have discounted traffic between us-east-1 and us-east-2, it costs exactly the same as traffic within the us-east-1.
Bluetooth latency from your phone to the speaker
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.
Most of us have no basis for evaluating the quality of kids education.
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.
It's the classic right wing trick where you take a government program that's working just fine and maybe needs a few touch ups and then yank all the funding while methodically sabotaging it in devious ways and then tell everybody, see we tried to have public services but she just can't do it like the private sector can.
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.
The same thing is especially important for BEV's !
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.
Given the mass of a typical EV battery it might not be enough to have a 120 volt 15 amp outlet like that used for the typical block heater to get the battery warm enough for maximum range.
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.
PURGE COMPLETE.
