raptop 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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<_whitenotifier-cd19>
[Principia] eggrobin opened pull request #2322: Use structured bindings when iterating on maps - https://git.io/fjp09
<_whitenotifier-cd19>
[Principia] eggrobin edited pull request #2322: Use structured bindings when iterating on maps - https://git.io/fjp09
<kmath>
<✔esaoperations> @esa This morning, @ESA's #Aeolus Earth observation satellite fired its thrusters, moving it off a collision course… https://t.co/5YcHB4L1PO
<egg|work|egg>
!wpn
* galois
gives egg|work|egg a radial !wpn -add:adj scandium singularity
<egg|work|egg>
um
* egg|work|egg
throws the singularity at the FCC
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<SilverFox>
hey yall is there such a study as photodynamics? slimlining things so that they are aerodynamic, but for light?
<UmbralRaptop>
If photon pressure is slowing you down significantly, I have questions
<UmbralRaptop>
Anyway, it's more about surface area and absorption / reflection vs transmission. A photon gas under non-silly conditions has an enormous mean free path
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<egg|zzz|egg>
!wpn whitequark
* galois
gives whitequark a line with a shinai attachment
<SilverFox>
UmbralRaptop, well, we deal with photon pressure in vacuums, like space, hell we even utilize it in different ways; stabilization + propulsion, but my question comes from the simple thought of "what if opposite??"
<SilverFox>
as yall know I'm a simple-minded individual
<SilverFox>
does black body radiation provide thrust?
<UmbralRaptop>
Yes, see the Yarkovsky and YORP effects for examples
<SilverFox>
I mean, for a given sphere it provides energy emission via light and infrared, but uniformly across the body, resulting in a net neutral, however, what if we isolate it to a singular part, and couple it via something like, aerogel, that doesn't conduct heat or allow it to pass through easily, and we just superheat a plate or something
<SilverFox>
bam, thermal thrust drive
<SilverFox>
are there any solids that can withstand 10,000 degrees C and not melt?
<UmbralRaptop>
Briefly
<SilverFox>
hmmmmmmmmm
<SilverFox>
whats the bot here
<SilverFox>
that does wolfram
<UmbralRaptop>
More seriously, tungsten melts at 3700 K, and you can usually only get a few hundred more degrees with exotic refractory materials like hafnium diboride
<SilverFox>
I see, well 10 grand was just an arbitrary number
<SilverFox>
what sucks is I can't fucking math so all these equations are meaningless to me
<kmath>
egg|zzz|egg: Wolfram couldn't understand your gibberish
<egg|zzz|egg>
!wpn
* galois
gives egg|zzz|egg an octupole cesium axe
* egg|zzz|egg
slaps kmath with the cesium axe
<SilverFox>
oh shit cesium
<SilverFox>
well damn, cesium melts at a measly 30 degrees
<SilverFox>
but carbon is 3550
<SilverFox>
whats the temperature point called when things become malleable?
* egg|zzz|egg
slaps mofh in the materials
<SilverFox>
okay nvm carbon doesnt melt, it just vaporizes
<whitequark>
there's no such single temperature
<whitequark>
metals become softer as you heat them up, glasses have a glass transition temperature but that's different
<SilverFox>
yeah but glass is a liquid anyways
<whitequark>
is not
<SilverFox>
then why in old houses is the bottom of glass panes thicker than the top? checkmate atheist
<UmbralRaptop>
!wpn
* galois
gives UmbralRaptop a cobalt saber
<whitequark>
because float glass is a new invention and glass has been produced for a very long time by making and collapsing a huge bubble then cutting it outwards
<whitequark>
have you tried looking this up in, i dunno, wikipedia
* UmbralRaptop
stabs SilverFox with a cobalt saber
<whitequark>
thanks UmbralRaptop
<SilverFox>
why the fuck would I do that
<SilverFox>
that's lame
<whitequark>
well you could also consider the kinetics of flowing glass but that requires using your brain
<UmbralRaptop>
Solid state physics is confusing and scary
<SilverFox>
its just solids man
<SilverFox>
its not it's fluid dynamics or anything
<UmbralRaptop>
;w debye model
<UmbralRaptop>
;wa debye model
<kmath>
UmbralRaptop: Wolfram couldn't understand your gibberish