Best audio book I’ve listened to… Dungeon Crawler Carl. Great story. Amazing audio book production.

I had one done recently due to breaking a filling while eating a Jolly Rancher. The whole thing took maybe 2 hours.

The shot of novocaine to numb my jaw was the only pain, and even that wasn’t bad because the dentist used topical numbing before that. It was no different than getting a cavity filled.

My dentist has a cnc machine (CEREC) in the office to make the crown, so I didn’t need a temporary cap. Waiting for that to be milled was the longest part.

I had a bruise on my gums for a couple days from the shot and the retainer clamp, but it wasn’t even bad enough to stop me from eating.

This was occurring for me also since 9/20. I deleted all cookies on chatgpt, reloaded the site, and logged back in. It would work for 20 to 30 minutes then do it again. Each time, the browser console would have a ton of 503 errors.

It seems that some of their nodes are working and some are in failure state. Their load balancer is occasionally directing to failed nodes.

Historically, this is exactly how theological disputes were handled. See Crusades on Wikipedia for more information.

If that were the case, how did you know to post about it?

AC as refrigerant, not coolant. Although that might be semantics.

AC is a type of heat pump. You are moving heat from inside to outside. The physics behind a heat pump, is fairly simple. There are three principles to work with.

1. Take a gas, compress it, and it gets super hot.
2. Take a compressed gas, let it rapidly expand, and it gets super cold
3. Different temperature gases move from hot to cold

Let’s focus on AC since most folks are used to that concept. In an AC, you have a closed loop of refrigerant. Outside, there is a compressor that compresses the gas, which makes it very hot. The gas is pushed through a radiator with a fan pulling air through it. Since hot moves to cold, the heat trapped in the gas moves to the outside air, and the gas is slightly cooled. (As long as the gas is hotter than outside).

Inside, there is an expansion valve that lets the gas rapdly expand, making it super cold. It is pumped through a radiator that has inside air blowing over it with a fan. Since hot moves to cold, the heat in the inside air moves to the cold gas, cooling the inside air. (As long as the gas is cooler than the inside temperature). It is then pumped outside to start the loop again.

So, inside gets cooler while the heat is moved outside. The physics also establishes the limits of the heat exchange. You will only grab heat from inside if the expansion makes the gas colder than the air inside. Typically it expands to around 0 degrees. Likewise, it will dump the heat outside if the gas is hotter than outside air. The compressor typically makes it 130 to 140 degrees (temps vary depending on many factors).

To use a heat pump for heating rather than cooling, reverse the process. Pick up the heat from outside and dump it inside. This will work as long as outside is warmer than the expanded gas (0 degrees or so). Although you can get some that go to around -20.