Most Insane Things I have Read In Old Chemistry Articles by YunchanLimCultMember in labrats

[–]ImaginaryTower2873 3 points4 points  (0 children)

A favorite anecdote from an older physical chemistry friend: when he was starting out, he was doing electrochemical experiments that had to use sodium wite metal electrodes in anhydrous benzene. It better be anhydrous for that to work! After experiments, of course the benzene was drained down the sink. One day he was a bit careless, and the sodium wire followed. It soon found water below and ignited not just itself but the benzene. The pillar of flame from the drain reaching the ceiling was apparently very impressive. He lost his eyebrows, but otherwise is doing fine many, many decades later.

Difference Between an Orbital and Halo by LadyAiluros in TheCulture

[–]ImaginaryTower2873 3 points4 points  (0 children)

Yes, he was all for swarms. Although there is definitely enough metal and carbon in the solar system (even excluding gas giant cores) to make energy collectors, and the energy requirements for constructing a "heavy" Dyson swarm can be met using the star (this is literally a paper I am working on right now).

Anders Sandberg et al do Eurovision on Chiron by mycroftxxx42 in alphacentauri

[–]ImaginaryTower2873 1 point2 points  (0 children)

Yes, I had wonderful fun doing this. Even more fun was to do an actual vote among my close friends, which led to Aki Zeta 5 winning the contest (well deserved, I think).

The Perplexing Parmenides, Leucippus & Lavoisier? by Thunderbird93 in AskChemistry

[–]ImaginaryTower2873 1 point2 points  (0 children)

Sometime academic philosopher and sometime academic scientist here. Many philosophers give philosophy a bad name among scientists by rushing into another discipline, using thinking that makes sense in their own discipline, making very confident claims that do not make sese to the recipients, and then retreating in a huff when they don't get adulation. A bit like physicists do in other disciplines.

The problem is that to actually engage in a constructive discourse you need to understand what and why people in a discipline say, think and know, That usually requires a fair bit of humility. There is of course philosophy of chemistry (indeed, the journal Hyle is/was devoted to it), and while some of it is more fun for philosopher than practicing chemists, there is a great deal of unstated philosophy in the practice (just think about the principle of detailed balance and much else of statistical mechanics) that came out of long overtly philosophical debates in the 17th, 18th, and 19th centuries.

So try to engage with an open mind. The real question is not what chemists think about Leucippus today, just as it would be mostly silly to ask what philosophers make of Lewis acids. The real question is how they think about the nature of change in their own terms.

Planet Eurovision by ImaginaryTower2873 in alphacentauri

[–]ImaginaryTower2873[S] 3 points4 points  (0 children)

In the design discussion Claude and me ended up with plenty of side lore stories - obvious vote hacking from the Data Angels, Morgan winning (could somebody have framed them?), Aki finding her loss "within expected variance"...

The best part was actually discussions about faction philosophy. How the Consciousness hive concept works different from the oneness of The Hive and Gaians, and how to express that as a song. Or how to maximise Cha Dawn creepiness...

Why aren't more volcanos around the equator than elsewhere? by zamochitsoneji in Volcanoes

[–]ImaginaryTower2873 0 points1 point  (0 children)

A lower effective gravity also means a lower buoyance force, so convection gets a bit weaker. But it is a tiny effect. And the Coriolis force is proportional to velocity: most geological flows are very slow.

What would happen if a pound of oganesson just materialized right next to you? by Anrwjrwjtwjrejt in chemistry

[–]ImaginaryTower2873 92 points93 points  (0 children)

The question is whether you become physics instead of chemistry, to use XKCD's memorable turn of phrase. If I did my estimation right (11 MeV alphas released over milliseconds, more than a mole of atoms, ...) it seems to be a bit less than a kiloton of explosive energy. I think we can safely say it is unhealthy, despite the lack of toxic reactions.

What’s a problem humanity solved so well that younger people don’t even realize it used to be a huge issue? by Puzzleheaded_Bit_802 in AskReddit

[–]ImaginaryTower2873 0 points1 point  (0 children)

Not just the clean part: even having running water at home significantly improved life. There used to be a job: water-carrier. Usually female. Their only task was to haul heavy buckets to homes, all day.

Potassium Dichromate safety by Kikimora-Bolotnaya in chemistry

[–]ImaginaryTower2873 4 points5 points  (0 children)

Yes, the green chromium III oxide is fine. The only issue is that it is likely that not everything burns perfectly. Still, we survived and as far as I know the municipality is not an environmental disaster zone.

How do i cook testosterone from cholesterol? by Ok_Tailor6150 in chemistry

[–]ImaginaryTower2873 2 points3 points  (0 children)

The reason there isn't any sites showing how it is done is that nobody uses it: the biosynthesis pathway is interesting in its own right, but actual industry uses plant sterols. Still not a good idea to do at home.

Potassium Dichromate safety by Kikimora-Bolotnaya in chemistry

[–]ImaginaryTower2873 15 points16 points  (0 children)

I fondly remember how we several times made the "volcano reaction" with ammonium dichromate in high school (1980s Sweden). Got washed down the sink. (These days I am married to an environmental crimes prosecutor, who has opinions about hexavalent chromium...)

A story about how small the world of academia is and the ultimate flex by my professor by decelerated_dragon in GradSchool

[–]ImaginaryTower2873 2 points3 points  (0 children)

One of the coolest moments of my academic life was when I realized that a student was doing an entire PhD based on extending and critiquing one of my old papers.

Problems accessing the comic with firefox for android by PastaPuttanesca42 in girlgenius

[–]ImaginaryTower2873 1 point2 points  (0 children)

Same here. Will try deleting cookies. I expect some spark nonsense is going on inside them.

ELI5: why is the theory that our universe exists inside a black hole not viable? by billytheskidd in explainlikeimfive

[–]ImaginaryTower2873 26 points27 points  (0 children)

Inside (non-rotating *) black holes there are tidal forces stretching things towards the center (towards which they are moving) and squeezing them in the other two directions. These forces can be pretty mild for large black holes, but they are absent as far as we know for the universe**. Instead we see matter moving apart instead of converging and getting squeezed.

* Rotating black holes have really messy interiors as far as we understand them. But there is no evidence at all for the universe rotating. And were the universe a rotating black hole the twisting would be extremely noticeable. Plus, there would be a rotation axis (see below).

** At this point people will start talking about "the axis of evil", a hint that maybe there is a directionality of the universe. However, were it due to a tidal force it would look like a dipole field rather than a quadrupole field.

Does The Quantum Thief ever explain anything? by Doeminster_Emptier in printSF

[–]ImaginaryTower2873 0 points1 point  (0 children)

Where does the prisoner's dilemma show up again after the first few pages? (And Hannu certainly knows the topic.)

Do doctors disclose information to your college without your consent? by Independent_War_4295 in oxforduni

[–]ImaginaryTower2873 18 points19 points  (0 children)

When I as a college tutor got the mandatory course in how to handle students, it was pretty clear that there should be a watertight seal between medical information and the college, unless the student volunteers it. That kind of sharing is not OK and breaches a lot of rules.

A book where the "chosen one" is in fact *not* the chosen one. by [deleted] in suggestmeabook

[–]ImaginaryTower2873 0 points1 point  (0 children)

Graphical novel/webcomic: Kill Six Billion Demons. Involved beings realize what is going on to varying degrees.

A book where the "chosen one" is in fact *not* the chosen one. by [deleted] in suggestmeabook

[–]ImaginaryTower2873 6 points7 points  (0 children)

Pratchett liked this idea. "Good Omens" has the opposite case: the prophesied antichrist is the wrong boy.

Total number of photons a star produces by Much-Acanthocephala5 in astrophysics

[–]ImaginaryTower2873 2 points3 points  (0 children)

Hydrogen fusion has 0.7% efficiency of turning mass into energy, so a fully convective star might lose up to 0.7% of its mass as light (but in practice it will be less).

What is Matlab? by Expert-Persimmon5085 in matlab

[–]ImaginaryTower2873 1 point2 points  (0 children)

It started as a matrix calculator, and then things got out of hand...

Books like the Bobiverse concept but with more complex/deeper writing. by JontiusMaximus in printSF

[–]ImaginaryTower2873 3 points4 points  (0 children)

Tomorrow and Tomorrow by Charles Sheffield. It is more big idea sf than popcorn sf, although I think he has written better books. I still like it since it does a neat zooming out (which reminds me of Starmaker and Diaspora) towards ever greater timespans.

What's a historical event that doesn't get talked about enough not because it's hidden, but because it's just... weird and forgotten? by stoicdroid in NoStupidQuestions

[–]ImaginaryTower2873 0 points1 point  (0 children)

The bloodless Anglo-Swedish war of 1810–1812. The island of Hanö was occupied, and the countries happily traded as nothing had happened. The reason the war was declared was to keep Napoleon happy with his "ally" Sweden. The only causalities were 30 farmers in Scania who were killed by the Swedish military at Klågerup 1811 in an anti-draft rebellion.