science/math .gif thread
post your shit you un-evolved apes!
normal static images also excepted!
I tried this with a car battery (my understanding is that that copper is a wire) and jack shit happened, so it must be hooked up to significant voltage, or maybe I was wrong
another possibility is >photoshop
its an extreamly high voltage, there is no way in hell you were ever going to get eny where with the voltage of a car battery
also why "fucking russians"?
I think it's supercooled water.
as soon as it finds a site to start growing crystals it can finally freeze.
"At 13.2 degrees Celsius (about 56 degrees Fahrenheit) and below, pure tin transforms from the silvery, ductile metallic allotrope of ?-form white tin to brittle, nonmetallic, ?-form grey tin with a diamond structure. The transformation is slow to initiate due to a high activation energy but the presence of germanium (or crystal structures of similar form and size) or very low temperatures ~?30 degrees Celsius aids the initiation. There is also a large volume increase of about 27% associated with the phase change. Eventually the ?-form decomposes into powder, hence the name tin pest.
The decomposition will catalyze itself, which is why the reaction speeds up once it starts; the mere presence of tin pest leads to more tin pest. Tin objects at low temperatures will simply disintegrate."
Neat. I learned something new today.
>my understanding is that that copper is a wire
>my understanding is that that copper
anon, what you see is called an "inductive heater"
use the internet for something other than porn and you can learn why that metal "levitates" and then melts. it's not hard to do IRL once you learn a few things you could cobble one together for a weeks wages or less
thank god for 4chan pass
fuck cooldown timer
i remember in classic mech 1 we had to do a double pendulum. hated that class during but now i miss it.
Okay, anon, Okay. I realize that I'm drunk, but fucking seriously:
What the fuck is wrong with you? "What are you, 12?" Are you serious? What are you? Pompous? Don't you realize that there are people in the world who aren't exposed to "science and math" as something that is "good on this earth"?
Don't you realize that every little bit of exposure to the interesting things that humans do is good for our species?
What are you? Fucking 12? Do you have to shun those who know less than you?
Seriously. Fuck you, anon.
Instead of sitting there on a Friday night complaining about a gif which explains what radians are graphically, why don't you go and fucking tutor someone who has never solved for tan(x) = .707 instead of complaining that a poster isn't rigorous enough?
Or, perhaps, if that isn't your thing -- why don't you just go fucking jump off a cliff instead of impeading knoweldge.
You are the problem, anon. You are the cancer. Not just the cancer killing /sci/.
The cancer killing humanity.
>I think it's supercooled water.
I think you're wrong.
Different anon here. If it's any consolation, I learned from your pi*rad gif. Truth be told, I don't think I ever had a good high school math teacher. Ever. It's been years since the section on radians, and when I had it, I pretty much just memorized answers. Thank you for posting the gif to show me how the math actually works.
Sincerely, thank you for your contribution.
I believe I was the one who found it elsewhere on the interwebs and brought it to /sci/ for repost after repost.
also google agrees with me
Uranium reactors are better understood from an engineering perspective. IIRC china is researching LTRs at the moment. But also, no one is really happy about building nuclear plants.
>china is researching LTRs
>no one is really happy about building nuclear plants
I guess in some ways its better when the ignorant masses don't have a say in what goes on. It frustrates me to no end that all these people with zero understanding are keeping us from such a better energy source. Maybe nuclear isn't the end all be all of power sources but its a hell of a lot better than what we currently use
LFTRs are part of the Gen IV nuclear reactors, which means they're only in the design stage right now, there hasn't even been a prototype developed. Gen IV reactors are expected to become commercially available in 2030, so comparing LFTRs to LWRs or SBRs - reactors that were built in the 60s and 70s - is comparing apples to oranges. In fact there are Molten Salt Uranium reactors that are equally viable as the LFTR and there is a Traveling Wave reactor that uses depleted uranium that is imho so much safer because all of the necessary uranium for the next millennium has already been mined and is being stored in holding tanks, and will only need to have its fuel replaced every decade or so, compared to the LFTR of I think 120 days, that seems to be the standard number of a molten salt reactor but I have no idea.
I didn't understand surface integrals until I found an application for them.
Imagine a steel plate in a magnetic field - you don't care about the volume of the area beneath the plate (Which is what a double integral would give you), you care about the sum of magnetic field lines that intersect the plate (Because that's the first step to finding out how much current will be generated if you move the steel plate).
The math is approximately well-explained here:
(Also, I am amazed that page still exists. I used it when learning about Laplace Transforms back in... 2009? The internet never forgets.)
You take a dead guy, preserve them, and slice them into many thin slices while taking pictures.
At least, that particular image. Most things that look like that are actually just MRI scans.
The sand is covered with a hydrophobic substance. I don't believe that the sand is special.
>is it hydrophobic?
Damn, did you guess that all by yourself? If I had seen this gif before ever learning how it works, I would have assumed it was magic. If that's the case, bravo, anon.
I thought that when andromeda passes through the Milky Way there would be too much space between space between each star for any damage to be done solar systems in either galaxy. Though I may be mistaken.
sadly i havent into trig yet. im pretty mathematically impaired
care to explain?
Well that explains why you don't get the fourth one.
sin and cos are two trig functions or functions that have to do with right triangles (a triangle with an angle that is 90 degrees).
They map an angle to a ratio of sides. The gif shows how the two functions change with changes in the angle
I don't hold soda in my mouth for a whole day.
They say 100,00 years is the minimum it would take humanity to colonize the galaxy with some level of feasibility
In 8 million years, all or most of the C02 in our atmosphere will have left Earth, making photosynthesis impossible anyways
When Earth becomes a desert do to the warning of the Sun, our solar systems habitability zone will shift towards Mars, making Mars a paradise for humans and should last us an extra billion years
If the TOE is correct, protons themselves will decay in several trillion years, making matter will be impossible
If anything else, protons will just decay into neutrons and can easily change back into protons
If science fiction writers and speculists are correct, humanity may some day prevent the death of the universe with our superior technology in the far future
>you won't be alive by the time they figure out immortality
>you will die before the "Age of Galactic Exploration"begin
>You will never be a lonely cabin boy for a galactic trading company traveling through space and to all the colonies on grand adventures
>born too late to explore the world.etc
>you will die before they figure out how to install your brain in a hot grill's body
Why do I even bother being alive?
You never know anon, what pisses me off though is scientists are pretty much saying "We pretty much CAN find the root causes of natural death, but we wont because overpopulation"
Why are scientists such sociopaths?
>not a girl
>every fucking time
Idk, of all the times in history it is probably best to be alive right now. Sure, if you are rich and powerful centuries ago, you could explore the world, but if you are poor though shit, you would die young and live a painful life.
Who know, in 20 years there could be a war and civilisation collapses. We might just be living in the best time in history.
uranium LWR got so widespread because they had military applications in a cold war world, ie making weapons grade material.
LFTRs really are that much better, were just still stuck with the cold wars nuclear legacy.
No, LWRs got so widespread because they're straightforward, can be made of cheap materials, are based in the very well-understood engineering of steam turbines, and don't have as much potential to go horribly, horribly wrong as something like graphite-moderated reactors.
LFTRs were mostly in competition with LMFRs (liquid-metal fast reactors), as compact, high-power-density breeder reactors for long-term independence of naval vessels, and LMFRs won because they were cheaper, more compatible with existing infrastructure, ran on cheaper fuel, and generally worked better.
Attempts to scale up LMFRs from naval reactor to power plant did not provide the expected economies of scale. Instead, they found that the corrosive molten metal provided unending headaches in a large reactor. The even more corrosive molten fluoride salts in an LFTR would be even more impractical for economical operation. Hot water's much easier to deal with, or at least we have centuries of experience with it, so we're very good at it. Now proposed fast reactors tend toward helium coolant, which if not as familiar as water, is at least entirely non-corrosive.
For bomb production, it's generally better to use an isotope production reactor, rather than deal with fuel rods full of nasty fission fragments and unwanted plutonium isotopes. These can be kept near room temperature, instead of running hot to generate power, which tremendously simplifies their engineering. Uranium's cheap, so "wasting" it just to produce neutrons isn't a problem for countries with large, secure supplies.
>Lack of any job security
>Shit teir salaries
>Spend most of your youth preparing to be a scientist and then upon graduation cannot find work
>Doomed to either beg for grants or be a highschool teacher.
This is the kinda shit that makes scientists sociopaths