Archived threads in /sci/ - Science & Math - 454. page
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Has anyone dealt with general relativity? What are the prerequisite maths you need?
>>7784195
Tensor Calc
Smooth Manifolds
Riemannian Geometry
Also being good at working with PDEs is useful considering almost everything you study in GR revolves around EFEs and their solutions.
light goes woo when gravity goes woooo and then your get compressed like wo and then you throw a baseball out of a car like weee
Why would you waste time on that? In general relativity gravity doesn't change from the Newton's law to bended space. It is both.
During my university career in engineering I've seen a lot people who are good at math but shit as fuck at engineering. What gives?
>>7784104
Why do people get their nose pierced? It looks awful and labels you as trashy.
>>7784104
who is this fluid druid?
>>7784112
I thinks he just has a grain.
>>7784104
>shit as fuck at engineering
>not knowing that engineering is an umbrella term
>not specifying in what engineering people are shit
>not specifying what you mean by people being shit in engineering
You said nothing in your post. Literally you conveyed no message at all.
GLOBAL WARMING SAVES HUMANITY FROM IMMINENT ICE AGE
I thought we were just leaving an ice age?
>>7784068
Bro, this is not a good thing. This shows that the Earth is gonna die, without the ability for it to renew itself, we're fucked either way.
Good, fuck humanity as a species, greed and corruption is so far beyond saving that an extinction level event is the only way to make things right
Mathematical genius is needed to help reaching 'enlightenment' in how the laws of the universe really work. (too slow and too hard to do on my own)
Test 1(there will be 2 tests in total):
Explain what's on the picture and what it means/how it works (mathematically).
>>7784051
Stupid faggot. You take the powers of the number, say 2 and you add the digits.
1, 2, 4, 8, 16= 1+6= 7 for the number 2.
I discovered this literally 4 years ago.
I've also found a proof that in base N, numbers containing dividers of N-1 are recurring
For 3:
> 1 3 9 9 9 9
For 6 (it contains 3 as a divider)
> 1 6 9 9 9 9
And this also works in every other basis.
>>7784100
By the way, the only interesting sequences are those of primes.
For example 19 will give 1, 8, 8 recurring.
>>7784100
>You take the powers of the number, say 2 and you add the digits.
>in base N, numbers containing dividers of N-1 are recurring
Not deep enough, but close. Overall, you don't understand how numbers work.
Good luck.
What would be the bare-minimum chemical, gravitational, geological, ect requirements of a SUSTAINABLE habitable exo-solar planet? Presuming humans with roughly the technology you'd commonly find now? Also what would it look like?
Or in other terms, what would an exosolar planet with the most hostile conditions possible, still 'turn a profit' or otherwise be self-sufficient look like. I know we can keep 1000 people around in McMurdo with imports and if we really wanted to.
>>7784043
>chemical
Anything goes. Even if the planet is covered in hydrazine, that'd be a problem, but a solvable problem.
>gravitational
Literally anything below ~2-3 g's works great.
>geological
>etc
it's highly desirable for the environment to have a surface pressure below 10 bar, temperature below 60C (if there's atmosphere), and not contain a bath or liquid,...
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>>7784057
Yeah that makes sense, thanks.
>>7784057
I'd say even 1.8Gs is still too high. It might work while you're in the spin thing NASA has, but you'd probably have a heart attack if you did anything physical because your heart now has to work much harder to pump the blood around your body.
> be me
> 8th grade sci
> Have in school suspension
> Teacher never taught me v = ƒ x λ and ƒ = 1/T
> Test tomorrow
> need help with frequency equation
halp pls
photo unrelated
>>7784042
Look up dimensional analysis
>>7784042
T=1/f: time from peak to peak
λ: distance from peak to peak
v: speed of peaks.
If a peak goes a distance of λ in time T then v= λ/T = λf
who here studies condensed matter physics? i'm wonder how much of it will bear relevance in the upcoming years, and if i should pursue graduate studies on it.
I don't study condensed matter in particular, but I have experience in a lab that has done some incredible research in recent years, and I'm more or less familiar with the theory. I attended the Prospects in Theoretical Physics lectures held by Princeton and IAS in 2015, which was on quantum matter.
https://static.ias.edu/pitp/2015//home.html
Topological band theory is a HUGE development in condensed matter, and the kind of materials that are being created (which host novel properties) could prove very very useful to advanced electronic systems. I really...
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Does anyone know where I can find good science and math posters? All I seem to be finding are periodic tables, high school shit and pictures of scientists.
>>7783996
What are you looking for?
>>7783997
Maybe a big cheat sheet with equations or diagrams. The more EE related the better.
>>7784007
though it doesn't have to be strictly that, I'm all for suggestions.
Do they teach functional integration in functional analysis courses?
>>7783990
Usually not in intro courses.
Does pear review really work? How many researchers actually have the time and the resources to attempt to reproduce other researchers' results? I imagine most of the pear reviewers just read the papers and if they appear plausible, they are accepted.
>>7783965
>does peer review really work
Depends. When different labs around the work beforehand agree to all perform the same experiments for the sake of truth then it works.
If you do something on your own and publish then I doubt anyone would waste their time checking your results, much less replicating the experiment.
There is no glory if you are not the first, so if you are the only 'first' no one will give a shit about reviewing your thing. But if various labs...
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>>7783965
>Does pear review really work?
Idk man. I always thoroughly review my pears before I buy them at the grocery store, but sometimes I still end up with ones with mushy brown spots on them under the skin. Not a great procedure, 5/10.
>>7783965
I think that its mainly a problem in social sciences and maybe medicine.
I'm a PhD graduate student in chemistry and I reproduce other people's research constantly. For example: I read a paper with a cool molecule that I feel like attaching to one of my molecules. I follow their procedure as they wrote it, and if I don't get what they got, then something is really wrong and immediately noticeable.
Hey I'm getting out of the military soon and was wondering what would be a great way or method to study mathematics and science?
Do you guys any known effective methods that help you out and would like to share them?
I've heard of the Cornell method of note taking and the Pomodro technique anything else worth mentioning?
>>7783935
Best advise I can give is to be curious, interested and not afraid to ask questions that might seem to have obvious answers.
>>7783935
If your IQ is less than two standard deviations above the mean, don't even think about it.
Pomodoro technique has worked great for me. I recommend it.
Can you help?
open chemdraw and drop a few templates
also do your own fucking homework
Great news today! NASA split the CRS-2 contract for ISS resupply three ways, between the existing SpaceX Dragon, Orbital Cygnus, and (finally!) new space plane Sierra Nevada Dream Chaser! A space plane will once again fly to orbit!
>>7783911
Dream Chaser had originally lost the crew contract to SpaceX and Boeing CST-100 (now called SpaceLiner). Now it will be repurposed for cargo delivery and low-stress return, due to its high lift gliding return profile.
>>7783922
The Dream Chaser is the culmination of almost forty years of design and refinement, starting from the HL-20 lifting body design. It will be great to see it get off the drawing board!
It already had a successful glide test, with another coming up shortly. The first orbital test launch will be sometime in 2017-18, now that funding is coming in again.
well that's cool OP
Nickel-powered super explosion or magnetar of mysterious composition?
http://www.smithsonianmag.com/science-nature/astronomers-found-brightest-supernova-yet-180957820/?no-ist
http://www.astronomy.ohio-state.edu/~assassin/index.shtml
http://www.nature.com/news/brightest-ever-supernova-still-baffles-astronomers-1.19176
its just too far away to give a shit
>>7783920
>its just too far away for monkeys to give a shit
FTFY
Choose the one that you would assume is male. Why did you choose the one you did
>>7783901
Neither of those can be male or female, they're markings on a piece of paper
>>7783901
2
saitama
2, because its 'fatter' or less delicate
