Unless our ability to cram delta-V into a spacecraft goes way beyond what seems possible now with chemical rockets, a trip to the moon is always gonna involve a few days of coasting through space. That’s always going to take more preparation than a transatlantic flight.
I sort of feel bad about raining on the parade of the person distilling isopropanol in his garage earlier, but it really is dangerous.
But most of us chemists also need to be reminded of it. To the point that someone had to write a paper whose entire point is “don’t distill isopropanol”.
Please, don’t do this thing.
The issue with isopropanol peroxide formation is that exposing it to air – even when just using it, like when you’re cleaning parts – starts the process. The air in the head space of your containers is also enough to form them over time. You don’t necessarily need to see solids in the containers for it to be dangerous, since they’ll crystallize out as you concentrate the solution during distillation.
It’s also a numbers game. It probably won’t explode the first time you do it. But there’s a chance each time. Do it enough, and you’ll have an incident.
There are chemical reductants that can clear peroxides. For industrial scale isopropanol distillation, I’m not sure what they use. It may be that they just never distill down to the point that peroxides concentrate to a dangerous level.
I love EnF. But I assure you, organic peroxide formers are scarier.
No no no no no.
I’m a chemist. Organic chemistry PhD, now a process chemist in the industry. I do this for a living. Do not distill isopropanol that’s been exposed to air for any meaningful length of time.
Isopropanol slowly reacts with oxygen in the air to generate peroxides that, when you concentrate them down, EXPLODE. Source. Sorry, not an open access journal. But please take my word for it.
Unless you have a way of confirming the peroxide levels in your isopropanol are near zero, do not concentrate it down by distillation. You’ll blow up your glassware, which will probably expose what you’re distilling to your heat source, which will generate a secondary fireball.
PLEASE do not do this.
Shit guys, the tone police are here! Scatter!
Billionaire evil is a sliding scale from normal rich guy evil to comic book villain evil. He’s less bad than his peers, even if the stuff he does (like the cost plus drugs thing) are maybe just for PR.
We eat him later than others. But we do eat him.
I also genuinely do not understand the appeal. But I also don’t understand the appeal of reaction videos on YouTube or network cop dramas, and they are also profoundly popular with stupid people.
I feel bad for laughing at this
I’m in the middle of a TNG rewatch. This is my next episode. Every time I look at the thumbnail, I just can’t. Even though Best of Both Worlds is so soon after.
Fuck off with this voter suppression shit
A lot of the Apollo work also got done in basically one administration (Johnson largely continued JFK’s policies). As soon as Nixon was in charge, NASA got gutted, and then they only had the resources for shuttle. Later Apollo missions got cancelled because Nixon thought the money was better spent killing more Vietnamese people.
Switching administrations means vastly changing policies, if for no other reason than the new boss hates the old boss. SLS “succeeded” (got hardware made and launched, at least) where Constellation failed partly because they buttered everyone’s bread in the right way.
HLS is dumb. SLS is dumb. But similarly to Commercial Cargo and Crew, it survived administration changes partly because NASA wasn’t directly at the helm, so the new guys didn’t just hit the big red stop button.
In the entire history of NASA, they’ve never manufactured any boosters for themselves. Redstone was from the army. Titan, also military. Saturn I and V were designed by NASA but contracted to big aircraft manufacturers as contractors. Shuttle was Boeing / Rockwell for the orbiter, ATK for the boosters. SLS is basically all the Shuttle contractors, again. (That was the point.)
I hear what you’re saying. But NASA would need to spin up an entire company from scratch to build their own rockets. That’s not what their mandate is, and it’s not what they’re good at.
Everyone always forgets the next, even better part: when Brady dropped a pass to him in the next series the Patriots had the ball. (Maybe it was later? I dunno. Sad Brady just makes me happy.)
The drinking is for when you have to make the mods work together without the game dying a slow horrible death, followed by a rather quick also horrible death
Technical people that move into management usually (but not always) suffer from something I’ve started calling management brain rot. They’re exposed to the spreadsheet warriors and their corporate jargon, and it doesn’t take long for the good ones to give up and the bad ones to thrive in a, let’s call it, “low-information environment.”
We eat him last.
I’m a Colts fan who was supremely bummed out when Luck retired. And really, we haven’t been very good since. It sucks.
But he’s a good guy, and he was getting absolutely obliterated out there. I don’t begrudge his decision for a second. I’m glad he’s going to be able to live the rest of his life with intact ribs and ankles and stuff.
I think Tua should do the same. It’s one thing to have your bones hurt forever. It’s another to have your brain turned to scrambled eggs and either eat from a straw for the rest of your life or end up going all Hernandez and killing someone and then yourself. It’s not worth it.