UmbralRaptor changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
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* galois
gives whitequark a superluminal pending hyperboloid
<whitequark>
!wpn egg
* galois
gives egg a boloid
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* egg|cell|egg
meows at whitequark
<whitequark>
hi
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<egg|cell|egg>
Hm
<egg|cell|egg>
trajectories are sections of the bundle of events
<egg|cell|egg>
Velocities are vertical fibers
<mlbaker>
jet bundles
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<egg|cell|egg>
Mlbaker: hmm
<egg|cell|egg>
Right, that's how you get higher derivatives
<egg|cell|egg>
Hm jet is jet in French in that sense?
<egg|cell|egg>
What's the etymology here
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<mlbaker>
that's a good question
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<egg|cell|egg>
Ah it seems it's jet as in spurt
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<egg|cell|egg>
I keep being confused by the English word with its English pronunciation because of its borrowing back into French with the exclusive meaning of reaction aircraft
<egg|cell|egg>
French: we don't always borrow English words, but when we do we give them weirdly specific meanings
<egg|cell|egg>
cf. slip, or foot
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<_whitenotifier-31f>
[Principia] pleroy opened pull request #2364: Changes to geometry to support the inertia tensor - https://git.io/JeEKz
<kmath>
<✔Asher_Wolf> A steppe eagle has nearly bankrupted a Russian bird-tracking programme with roaming text messages after it flew to… https://t.co/5OTI3qMNzA
<SilverFox>
I feel like they couldve taken some liberties here and shortened the text
<SilverFox>
I hate having to try and parse bullshit-long legal texts
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<SilverFox>
a question for yall about profs/teachers. I had a physics teacher in high school who was very, very knowledgable for her pay grade and was decently studied, but she was not quite the best at teaching these things, but she understood them well. How would you turn this situation into a positive one by extracting or parsing their knowledge better so you can learn from it?
<UmbralRaptor>
Also, unsure. I know that they barely taught us how to teach when I was a GTA
<X>
Umbrella brought out the complex numbers. =(
<SilverFox>
Questions: 1) can an atom at absolute zero decay?
<X>
An atom cannot exist at absolute zero.
<UmbralRaptor>
I'm going to go with yes, and this will heat the substance
<X>
So no.
<SilverFox>
alright, well how about ƐK
<SilverFox>
if the atom can decay, can decays result in photons?
<UmbralRaptor>
interiors of white dwarf stars can be usefully approximated as being at 0 K
<UmbralRaptor>
Yes, depending on the atom and decay path
<SilverFox>
I figured
<UmbralRaptor>
Also bear in mind that the nucleus will recoil from conservation of momentum
<SilverFox>
at ƐK you're barely moving, there's so little energy there, how would a photon get generated and be able to attain speeds of c, from resting motion of basically zero, if you can't accelerate an object to speed of light because it takes more and more energy to do so
<SilverFox>
where does the energy to create that photon come from? just the sheer energy in the matter existing?
<UmbralRaptor>
The nucleus has energy levels, much like the atom as a whole, and can be in an excited state
<SilverFox>
so releasing energy drops it down a state or N-states right?
<UmbralRaptor>
yeah
<SilverFox>
so it will never do anything at the most bottom state
<SilverFox>
unless it is excited by an external force
<UmbralRaptor>
yeah. since we're talking about decay, one process is a heavy nucleus in a ground state decaying via α or β emission into a lighter nucleus in an excited state
<UmbralRaptor>
(eggcited?)
<SilverFox>
summatory question: how the fuck photons exist
<SilverFox>
why do they exist at c when no other object can achieve c
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<SilverFox>
how does it emerge into conditions of c
<SilverFox>
it's crazy man
<UmbralRaptor>
photons always go at c, the other particles not so much
<SilverFox>
yeah and I've heard that when a particle not photon, goes at c, it becomes photon, because only photons exist at c
<SilverFox>
and you can't slow a photon below c? (in the same medium)
<UmbralRaptor>
uh
<SilverFox>
whats the slowest medium a photon can travel through?
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<SilverFox>
I know that we have a camera that can observe down to speed of light, like trillions of frames per second, but what's the most we can slow down a photon through mediums?
<raptop>
I have vague memories of seeing articles involving sodium vapor
<SilverFox>
I wanna see the photons
<SilverFox>
like they did on uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh the Slow Mo Bros
<SilverFox>
raptop, can relate, all I have are vague memories
<raptop>
hrm
<raptop>
Belatedly, photons go at (and only c in vacuum) for relativity reasons (no rest mass). Anything with a non-zero rest mass will always go slower than c, no matter how much energy you give it
<SilverFox>
because inertial requirements go up infinitely, eh?
<raptop>
something like that
<SilverFox>
rather, it'd probably be exponential
<SilverFox>
but approach infinite the closer you get to c
<raptop>
hyperbolic, really
<SilverFox>
fair enough
<raptop>
kinetic energy = (γ-1)mc^2, γ = 1/sqrt(1-(v/c)^2)
<SilverFox>
how do yall denote the hat shenanigans, the - over a variable, in irc-like text form?
<raptop>
At least in some cases, hats over variable eggsist in unicode, though
<SilverFox>
i cant see that tweet
* raptop
pokes the bad bird website with a stick
<SilverFox>
I've been having issues not seeing tweets from here
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<egg|cell|egg>
Raptop: meow
<raptop>
egg|cell|egg: caw!
<egg|cell|egg>
Raptop: meow!
<raptop>
egg|cell|egg: CAW
<egg|cell|egg>
Raptop: 喵
<raptop>
egg|cell|egg: ＣＡＷ！
<SilverFox>
ㄷ
<SilverFox>
ㄷ Å ₩
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* raptop
stabs ubuntu in the IME
<raptop>
!wpn
* galois
gives raptop a pointy Yuggoth snake
<egg|laptop|egg>
!wpn raptop
* galois
gives raptop a cobalt insignificant field
<raptop>
We approximate the field as having V = 0 everywhere
<raptop>
But it is a nice shade of blue
<raptop>
!wpn egg|laptop|egg
* galois
gives egg|laptop|egg an ellipsoidal zinc planet
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<egg|laptop|egg>
!wpn -add:adj Cholesky
<galois>
Added adj 'Cholesky'
<raptop>
!g Cholesky
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<SnoopJeDi>
SilverFox, galois's !c doesn't do anything you can't immediately type at a fresh Python REPL, but I kludged the callable functions from the math module into the allowed AST, so those should work now. The functions with multiple args (like atan2) can't be supported because the !c implementation does this idiocy:
<SnoopJeDi>
# Account for the silly non-Anglophones and their silly radix point.
<SilverFox>
my bot does multiple args via pipes as a seperator
<SilverFox>
~choose A | B
<SilverFox>
for example
<SnoopJeDi>
sure, galois does that too, but calling that a "pipe" is icky
<SnoopJeDi>
anyway, !c is overengineered in Sopel, it builds an AST that by default just ignores ast.Call nodes
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<SilverFox>
is that not what it's called?
<SnoopJeDi>
no
<SnoopJeDi>
!u |
<galois>
|: U+007c VERTICAL LINE
<SilverFox>
isnt there a term in program called piping?
<SilverFox>
programming*
<SnoopJeDi>
yes, and that's not that your example is
<SnoopJeDi>
which is why it's a slightly confusing thing to say
<SilverFox>
right but that's my background in knowledge, hence why I called it that
<SnoopJeDi>
anyway, overengineered or not, it was a surprisingly concise fix, so maybe calling it overengineered is being a little mean
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<SilverFox>
using , for a decimal point is silly anyways
<SnoopJeDi>
it's a bad way to solve that problem, since the locale module is a thing, but that's pretty par for the course with Sopel
<SnoopJeDi>
makes sense the way they imagined it working though, since it wasn't built to support calls or sequences or anything that you'd need a comma for
<SilverFox>
yeah and using 7-bit for ascii made sense back then, but now it doesn't as much
<SnoopJeDi>
uh
<SilverFox>
ram is cheap, you dont need to save bits that religiously
<SilverFox>
anyways, use <Vertical Line> as a seperator and you can do multi-args easily that way, unless you use <Vertical Line> to represent uhhhh absolute values
<SnoopJeDi>
Python expressions don't work that way
<SilverFox>
why's that?
<SnoopJeDi>
!c 4 | 1
<galois>
SnoopJeDi: <class 'sopel.tools.calculation.ExpressionEvaluator.Error'>: Ast.Node 'BinOp' not implemented.
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<SilverFox>
ah yes, the binary operator
<SnoopJeDi>
oh, interesting, | isn't supported
<SilverFox>
a calculator mode would be cool
* UmbralRaptop
🔪 things
<SnoopJeDi>
!wpn UmbralRaptop
* galois
gives UmbralRaptop a primitive iconel merlin
* UmbralRaptop
wishes that math wasn't mostly clever tricks that one can never figure out on their own, and only work for a tiny number of problems
<SnoopJeDi>
UmbralRaptop, quals grief?
<SilverFox>
hey I have an idea, you know how there's the problem of running things in a sandbox, and how to tell when they're in a loop, have the sandbox god program insert lines of code into the stuff and these code segments send a ping back to mothership to say they're accomplishing their task still, after X amount of time of not pinging home, it kills the program
<SilverFox>
an infinite loop that is
<UmbralRaptop>
SnoopJeDi: yeah, especially E&M at the moment
<SnoopJeDi>
guh
<UmbralRaptop>
Consider: a dipole of moment $\hat p$ lies a distance h above a grounded conducting plane, and parallel to it.
<UmbralRaptop>
Find: the surface charge on the conductor; the potential and field at any point above the plane; the torque on the dipole