/sci/ - Science & Math

>>7259280
This is so calming to watch, somehow. Do you have higer resolution? I want to make a wallpaper with it.

>>7259346
How would you make a webm your wallpaper?

That's such a waste and your computer will hate you.

>>7259280
What's going on there?

>>7259360
uranium in a cloud chamber

>>7259359
I thought i would just pause it at some point, and use that.

>>7259360
It's a bubble chamber, radiation becomes visible through viscous drag.
The material in the bubble chamber is uranium, which is why it's so radioactive.
Bubble chambers are pretty cool

>>7259275
Here's your reply.

>>7259385
its a cloud chamber, not a bubble chamber, though similar, and the trails are from ionization

>>7259385
pretty sure it's a cloud chambe

>>7259391
>>7259396
I meant to say this yes, these guys have it.

>>7259275
This person is not very smart.

>>7259396
r

>>7259396
I missed it, where did the bullet come from?

>>7259422
first, don't try this at home.

he filled a glass bottle with a bit of water and slammed the top as hard as he could.
The bottle moved so suddenly that the water couldn't keep up, This creates a cavitation bubble - a bubble of just vacuum - on the bottom of the glass jar. The bubble violently collapses, smashing the water on to the bottom of the jar until it breaks.

This is why you need specialized tanks to keep mantis shrimp; their punches create these types of bubbles.

>>7259413

>>7259463
Source? I'd love to make a higher quality gif.

>>7259544
Just search Motor protein on google mate.
https://www.youtube.com/watch?v=y-uuk4Pr2i8

>>7259544
https://www.youtube.com/watch?v=FzcTgrxMzZk
around 4 minutes or so.

>>7259446
No fucking way

>>7259457
But who was pale blue color?

Was it a photoeffect or did the black hole simply bend light from a far-off source?

>>7259561
>>7259563
>Just search Motor protein on google mate.
That's so obvious I thought I already did that...
Thanks, too bad the higher quality version is over 4 MB.

>>7259628
webms are the future, get with the times.
easily fit a 4mb gif in a 200kb webm.
webm for retards. google it.

>>7259573
>No fucking way

agreed

>>7259636

>>7259346
https://www.youtube.com/watch?v=ZiscokCGOhs

>>7259674
Ah, thank you. I guess it was already the max res... too bad.

>>7259690
Still not good enough
https://www.youtube.com/watch?v=huh4GEPKYt4
>Headphones warning

>>7259690
>>7259790
>sperglords think that rubiks cube requires intelligence
>literally just memory and manual dexterity
fucking autists

>>7259799
Maybe they have never solved a rubik before so don't blame them.

>>7259678

How do you make a wallpaper form a webm?? Is this for a mobile or a pc?

>>7259431

> specialized tanks to keep mantis shrimp

Those little bastards are incredible.


Regarding the webm, something like that happened with my beer once. I don't know if it was exactly what happened in the webm, but have you ever had someone slam the top of your beer to make it froth up? A mate did that and the bottom fell out of my bottle.

>>7259799

This. I solved my first one in about 20 minutes after reading a guide. Took me about 2 days to memorize the algorithms.

Comes naturally now, like muscle memory.

It's a pretty cool 'party trick' if there's one lying around. I had one bloke in school "mess it up" for 3 hours during class, thinking he'd made it impossible. His face when I solved it in under a minute was priceless.

>>7259799
Sounds like someone couldn't finish their rubiks cube :^)

>>7259826
that's exactly what's happening in the webm.
I learned about this trick from drunk physicists

>>7259799
>>7259833
My funniest experience is that I have a math friend who bought a cube and want to find a solution on his own. He gave up after a week then I point out that it has a general guideline to finish it.
He didn't believe it at first but it was pretty funny when I send him a youtube guide.

>>7259843

IIRC it took Rubik about a month to solve when he made his first one.

Knowing there's such a simple solution does take some of the fun out of it though. I've moved onto 4x4x4 and 5x5x5 now. A bit tougher but after a while it just gets a bit repetitive.

>>7259690
The most disgusting thing about this gif is
>SAMSUNG

>>7259265
>Engineering gifs
Have you checked >>>/hm/ ?

>>7259855
Nice meme :^)

Does any of you have the gif where they spill some black liquid on a shoes but it doesn't leave a single stain on the shoes?
It's one of the guaranteed replies series.

>>7259446
Did he died?

>>7259457
What's the time frame here?

Anyone know?

>>7259448

>>7259457
>>7259908
>>7259580
http://www.space.com/15506-giant-black-hole-swallows-star.html

>>7259431
isn't the cavity steam?

>>7259448
Engineering gifs? How is that an eng- oh wait :3

>>7259544
>higher quality gif
What is this, 2013? Make a webm you retard.

>>7259280
A have a question about this. Why is it possible to see the trails forming? These particles are moving at something like 15km/s.

Shouldn't you just see an instantaneous stream form? Not one that radiates from the center outward.

Is it as simple as the speed of the particle being impeded by the liquid?

>>7261387
Is that broccoli?

>>7261420
ionization of the vapor in the chamber
>Shouldn't you just see an instantaneous stream form? Not one that radiates from the center outward
its just the diffusing of the tracks once theyre formed. its super saturated, so when the radiation ionizes it, it gives the vapor a chance to condense, forming the mists. then it diffuses and revaporizes which is the part youre seeing when it appears to get longer radially

>>7261405
LOL

>>7261424

yes

>>7261206
http://en.wikipedia.org/wiki/Water_hammer

>>7261508

>>7261524

>>7261530

>>7261539

>>7259446
What's even neater is realizing that everything does this, but the ripples are too small to see because most objects are too rigid.

This is also the reason why tapping out Morse code on a metal rod one light year long can't transmit information faster than light to someone on the side. Wiggling it just sends ripples through the rod at the speed of sound, which is too fast for us to observe on an everyday scale.

tfw you realize everything solid is just super stiff jello.

>>7261544
>speed of sound
Try making the rod near 0 kelvin.
Shit bricks.

>>7259448
kek

>>7261540
why does fourier transform work though? I never got that.

>>7261582
Because the sines and cosines form a Schauder basis for the inner product space of integrable functions on the unit interval.

>>7261588

>>7261540
>>7261582
Is this supposed to show the fourier transform? That would make a lot of sense I had no idea what this was. Is f-hat supposed to be decreasing by half forever? If so that would explain why this works, the smaller amplitude of sin/cos contributes less to the total function so once it gets small enough we can just approximate it to be continuos?

Sorry if this is absolutely retarded, but I've taken up to diff EQ at community college and feel my education wasn't satisfactory on the deeper conceptual level. Anyone else giving their explanation of this would be appreciated.

>>7261589
Oh, sorry. That should be the space of "square integrable functions".

Look up the terms if you don't know what they mean.

>>7261206
very low pressure steam.
remember that perfect vacuums are really hard to create. As soon as you create one in a container, the container will start to evaporate to fill in the empty space

>>7259446
this is absolutely positively not a golf ball. Ripples would be seen yes but at a muuuch smaller amplitude. It would have shattered at speeds high enough to create waves of that amp

>>7261717
Prove it

>>7261717
also adding that there are golf balls that are much softer than regulation golf balls, this is not a regulation golf ball, it is significantly softer

>>7259448
very scientifical

>>7261393
wut is this real?

>>7261895
No, it's an animation you stupid fuck.

>>7259446

>>7261524
It looks like a hairy vagina and butt viewed from the bottom.

>>7259396
Why does this make me want to smoke weed?

>>7261567
Speed of sound warm > speed of sound close to 0K > speed of light

>bricks unshit

I'm laughing so fucking hard at these gifs right now

Is this autism?

>>7264255
Dat Delta P

Who has the crab sucked into deep sea pipe?

>>7264262
kek

Not a gif, but I used this as my wallpaper during a presentation.

>>7259280
Hnnnggg cloud chambers make me cum.

>>7264303
Why you're not on my college?

>>7264305
Yeah, only so you can detect your penis and mastrubate.

>>7259265
http://en.wikipedia.org/wiki/Stirling_engine

>>7264187
You thought sound would be faster than light?

>>7264313
It's not small, it's just fast and charged.

>>7264303
that's not even correct

>>7264327
proofs?

>>7264329
f(x) <= g(x) <= h(x) doesn't make sense. Those are functions. There are literally an infinite amount of x's where that statement isn't correct.

>>7261508
The fuck kind of plane is that?

>>7264269
https://www.youtube.com/watch?v=f17abJOMel4
Shit quality but it's the best I can find

>>7264362
The VTOL kind

>>7264343
<div class="math">
\forall x \in [a,b]
</div>

>>7264365
Shit quality only begins to describe that

>>7259675
my dick

>>7264486
No shit but can you be more specific?

>>7265295
Isn't that a longitudinal section, not a cross section?

>>7265301
Thank you

>>7259850
>I've moved onto 4x4x4 and 5x5x5 now.

If you want a challenge, go to higher dimensions, not just bigger in 3D.

pic related, it's a 3x3x3x3x3 one

>>7259396
water bonk

>>7265295
I hope they don't mean they found those rounds in a Swiss bunker. Some of those are fairly rare experimental US cartridges.

>>7264269

>>7265341
Did it survive?

>>7265303
I was being serious; english is my third language. I was wondering if you don't qualify the orientation of the sectional plane in relation to the object being bisected in english? I.e. can a "cross section" have any orientation in relation to the bisected object?

>>7261424
dis is grapes
google MRI food or smth

>>7261650
alpha as fuck

>>7265283
>takingittoofar.gif

>>7265285
what is this?

>>7265286
pata pata pataaa!

>>7265309
I do this too every now and then, with a spoon or the handle of a teapot.

>>7265326
this is a luger btw

>>7264260
my favorite

>>7265369
didnt realize there was a pony in that one lol

>>7265295
how the heck did they saw through the metal without igniting the gunpowder?

>>7265387
kraut space magic

>>7265387
By using a very powerful, violent and sparkly sawing technique.

Sieve of Eratosthenes

taken with a Lytro camera

>>7265371
i got u

>>7265402
Wow, there's a wormhole in the middle of the left Wing.

>>7265358
wtf is that

>>7265404
>>7265371
>toggle locks

>>7261596
Check partial differential equations.

It-s fourier transform. Anything with periodicity can be translated to a sum of sine waves in frequency space. This techniques is not limited to electrical/sound/electromagnetic analysis, but used on solid state physics.

>>7265408
fake

>>7265379

if you look carefully you can see his peepee

>>7265476
It's so small

>>7265427
Your mom is fake

>>7265325
Just like my anus

>>7265364
Analog display for a thermometer

>>7264365
Inb4 imagine you're a human

>>7259396
Cavitation is a mean bitch, we've lost many expensive piping to retards who change the pressure delivery without consulting engineers.

>>7259457
The gas wouldn't actually remain luminous right?

>>7265309
Can anybody tell me if there is any math about this?

>>7264279
I've read somewhere that this visualisation is incorrect

>>7265319
thank you lord satan

>>7265752
It's incorrect in the sense that the plane of rotation actually matches the suns rotation around the galactic center, instead of being perpendicular like the image suggests.

Otherwise it's more or less right.

>>7265668
It takes time for all of the energy in the gas to be radiated.

>>7265319
But how?

>>7265325
>spicyfood.webm

>>7265768

Actually the plane of the Solar system is quite a bit out of whack with the plane of the galaxy. It's not perpendicular as the .gif suggests, but it's still pretty wonky.

orbiting a comet is easy

bring it on, climate deniers

>>7265413
let's be a little /k/

>>7261524
>>7261530
What is used to make these?

>>7265429
beautiful
machining is awesome

>>7265711
It's the difference between turbulent and laminar flow. This guy has a bunch of images he uploaded himself in his kitchen sink when I googled this: https://graphics.stanford.edu/~lucasp/pictures/italy/sink/

The math is probably complicated, and like the vast majority of problems in fluid mechanics does not have an exact analytical mathematical representation. However this sort of phenomena (i.e., the fluid field) could be modeled or approximated using Navier-Stokes equations.

>>7265844
>>>reddit.com

>>7265429
>>7265424
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

>>7266036
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

>>7261720
Stress/strain profiles brah

>>7261720
Pretty sure a golf ball would have cracked after that much strain.

>>7266048
that doesn't prove shit.

give a maximum stress or strain and a quick FEA

>>7266057
and that video is evidence it didn't.
I'm admitting it's possible it was faked, but can you show me evidence that it was?

>>7265905
DIRECT IMPINGEMENT IS SAME AS SHIT WHERE EATS

>>7265038
>>7264486
>>7264362
http://en.m.wikipedia.org/wiki/Dornier_Do_31

>>7266070
easy there, Captain Capslock

https://www.youtube.com/watch?v=N0JAvuc8KOs&ab_channel=GoodmanFeels

Video related

>>7266173
jesus christ japanese porn is bizarre
they really jerk off to women squealing like little girls
disgusting

>>7264509
>>7264343
>>7264329
>>7264327
It has to be defined before and after the point in question.

>>7259457

giygas

>>7259799
the first two layers require a decently respectable spatial intelligence to solve quickly. you can't use algorithms for that because a scrambled cube is pseudorandom.

of course, it doesn't take intelligence to memorize the algorithms for solving the last layer. but smart people will optimize, of course, by understanding each move and changing their strategy for solving a cube based on its initial scrambled state.

also you seem to be talking about shitheads who play with rubik's cubes in public and take them to parties and shit. yes, of course they're autists. of course they're idiots. speedcubing is where the competition is, and hence where people who possess discipline and intelligence can be found. and just in case you didn't know, there's also a category of speedcubing where people solve while blinded. if that doesn't require intelligence, i don't know what does.

>>7264275
blueballmachine

fuck man, that was the bomb in middle school
If you don't know it, listen it with the music
http://blueballmachine2.ytmnd.com/

>>7265424

>>7265424
>>7266590
imagine a horse

>>7266624
i dont have to

>>7266626
>>7266626
how can you call yourself a scientist if you cant face reality?

a philosopher, magus or shaman would be a more befitting title for you

>>7266631
Not him, but there is no point in throwing a horse in that machine, there is not scientific benefit of that.
And he didn't even claim that he's a scientist.

>>7266631
Pretty sure he meant he doesn't have to because there's already a video out there and he's seen it. I know I've seen the ones with the pig and the cow so a horse wouldn't be a that much of a stretch.

>>7265402
Does the Lytro do that? I thought it only did fancy focusing stuff.

>>7266638
sauce

>>7265839
Seems like a shitload of burns for no apparent reason... at least they should be relatively small burns.

>>7264187
> >
Don't you mean < ?

>>7266682
>shitload of burns for no apparent reason
Im sure there is a reason, you are just ignorant

>>7266691
>no APPARENT reason
If you have any useful insight, by all means, enlighten us.

>>7265808
Is that in real time? I thought it was over a period of days/months.

>>7266029
>>7265711
>The math is probably complicated

It's actually not that complicated, you can model it with the momentum integral balance (as opposed to differential N-S balance).

There's an example problem in "Fundamentals of Momentum, Heat, and Mass Transfer" Welty, Wicks, Wilson, Rorner 5th edition that does something very similar for an incompressible laminar flow assumption.

>>7266065
Ignore them, they're freshman morons/Civil engineers, modern gholfballs are polymeric composites that can sustain tremendous amounts of strain before reaching the tensile strength.

Read Callister's section on composites (chapters 15-20 iirc) to see how polymer-metal/fibre/ceramic composites work on a molecular scale.

>>7266731
flux is magic

>>7261582
Play around with plotting Fourier graphs on Matlab/Octave if you don't understand. It's the sort of thing you can only really 'get' if you see it happen visually.

>>7266742
using fft on MATLAB is why I know I don't understand fourier transforms

>>7266731
WUT
>>7266734
I've done my soldering in a electronics course, but how come flux behaves like this? I've never seen anything like that happen.

>>7266746
see >>7266734

>>7265408
Solar ejection. The "object" is just a lack of material due to magnetism or some shit. Look it up if you want more technical detail.

>>7266744
Lazy cunt. You're supposed to write a script to draw the graph.

>>7266766
but I don't understand what it's suppose to be plotting besides amplitude vs frequency

>>7266767
You plot x against y?

m = 1;
x = 0:0.01:8*pi;
y = 0;

while m < 100
c = (m+1)/2;
y = y + 0.5 + 2*sin(c*x)/(c*pi);
m = m+1;
plot(x,y);
end

plot(x,y);

>>7261513
wat

>>7264279
>implying

>>7261111
>>7266715
The link the other anon posted says the simulation lasted 179 days. I don't know how much time the gas would still radiate. Can any anon enlighten us?

>>7266737
>muh dick

>>7266748
That's not just cold air right? What's going on here?

>>7266143

How new are you?

>>7266825
sulfur hexafluoride iirc

>>7266624
http://www.dailymotion.com/video/xrfz36_18-la-dechiqueteuse-a-animaux_news?start=1
>And this kids, is how patties are made

>>7266746
I'm going to guess it's due to the hot molecules of air pushing against the flux and fluxes large surface tension keeping it on the metal

>>7266851
Wow it just turns to mush after a while.
Were they dead beforehand or just drugged up?

>>7266914
This is way funnier than it should be

>>7266914
lol

It looks like it was built too tall though, a few almost got out or nearly decapitated. If these are wild pigs they're just trying to kill the latter might be ok but not the former.

>>7266929
Why am I hearing sounds from a gif?
Fuck that uncanny shit.

>>7259951
Is that a RAMjet?

>>7266929
the fuck is that

>>7266944
Some uncanny shit.
https://www.youtube.com/watch?v=W1czBcnX1Ww

>>7266925
>no feeder mechanism

>>7266929
It's funny how some people are like "wow that's amazing" when they see that shit, and others are like "LOL is dis gonna take over the world ik cant even walk"

>>7266737
Embarrassed to say I've never seen this reaction before. What is it?

>>7266918
>straandbeest
Much dick

>>7266971
Nigger cock when it spots your cuck ass.

>>7266936
F 14 going full afterburner

>>7266703
Not him but it was because the rotation of the comet and of the orbit wasn't different enough. So by doing this, they could map the comet. they used like 20 or 30 of m/s so anyway it isn't that important.

>>7266931
>or nearly decapitated
Looks like there's one stuck on the left.

>>7266959
Beside the bovious cool aspect, it's way less efficient than a normal robot using wheel.

>>7266949
>you're walking around a forest at night
>lost as fuck
>suddenly you heard a sound zbbzzzbzzz
>that thing is behind you
spooky

>>7266789
Inductive heating

https://www.youtube.com/watch?v=VydPQuLyEns

>>7266971

IIRC Sulphuric acid + sugar

>>7265346
No, you were correct in calling it a longitudinal section your first try.

>>7266971
Sulphuric acid and sugar.

>>7266737
Looks like my fcking dick.

>>7266929
This is FUCKING spooky.

>>7266994
It is better when the landscape is uneven though, robots with wheels can't handle mountains.

>>7266882
I don't think the uploader had much more information than we do about the video, but it says they were dead.
They wouldn't bother drugging them up anyway, even the strongest, smartest human would end up grinded by this shit

This is pretty cool, but too long to post here.
https://www.youtube.com/watch?v=NtKH_fKOod0

>>7266936

No. It's a F-15 which has two low bypass turbofan engines (the F-100).

>>7266987

F-15

>>7266743
I've known enough schizophrenics to know where this is going

>>7261582
If you have infinite corrective factors, you can approximate anything

>>7267237
this
this is how i understood it
there's a certain intuition about it
imagine youre trying to approximate a straight line, but all you have is curvy wires and glue or tape or something. now the rule of this is that if a wire curves up where another curves down, they cancel out. so you imagine you have infinite curvy wires, all with different curves, that eventually you can find a combination that will give you a flat wire. now extend this to any graph ever and youre done.

Seamless pipe extrusion.

>>7267259
O-onii-chan its too big!

>>7267259
It's like 1000C playdoe

>>7267268
>that arm that has to come down and support the extruder as it slams into the other machine
teehee

>>7266825
Lol apex seals

>>7266974

nice tumbler gif faget

>>7266070

>>7266931
>nearly decapitated
What the fuck is the problem with that? Fucking hogs.

>>7267704

>READING COMPREHENSION IS FOR OTHER PEOPLE

>Captcha: Fried chicken is a type of steak right?

Direct evidence captcha is a negro

>>7267748

>>7266929
Good work engineering bros, but seriously, fuck this thing.

>>7259951
Nice diamonds.

>>7259675
Oh.. Wow..

>>7259385
>The material in the bubble chamber is uranium, which is why it's so radioactive.
Uranium is one of the least radioactive of all radioactive materials.

>>7266737
>instanthorsedick.gif

>>7265319
Whoaaaa.

>>7266789
Foucault currents, then curie temperature.

>>7266851
>cows fucking explode
holy shit

>>7265341
This kills the crab

>>7266743
>bed of chaos.gif

>>7268360

>>7265371
You like guns? Take a rifle sized version of this:

https://www.youtube.com/watch?v=W-2iy81k9DM

>>7266825
hnnnng rotary engine.

>>7268476
>forgotten weapons
You should come to /k/ some time. We'll like you