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/sci/ - Science & Math

 Name Options Subject Comment Verification 4chan Pass users can bypass this verification. [Learn More] [Login] File Please read the Rules and FAQ before posting.Use TeX with tags for inline and [eqn] tags for block equations.Right-click equations to view the source.  05/04/17 New trial board added: /bant/ - International/Random 10/04/16 New board for 4chan Pass users: /vip/ - Very Important Posts 06/20/16 New 4chan Banner Contest with a chance to win a 4chan Pass! See the contest page for details. [Hide] [Show All] [Catalog] [Archive] Can 24c kill me? 5 replies omitted. Click here to view. >> >>9885264 What about prolong exposure? >> >>9885264 Given that room temperature is often taken to be about 22°C, I'd say you're probably correct, maybe a little bit higher than optimum but not significantly. >> >>9885270 Prolonged exposure to barely above room temperature? Imagine the horror of maybe being a bit warm but not uncomfortably so for hours. >> >>9885272 >room temperature is often taken to be about 22°C where are you from? >> >>9885189 Only if you're a pussy File: 1532224836273.png (182 KB, 1100x400) 182 KB PNG In this alternative timeline, the Australian natives died off thousands of years before James Cook step a foot on the southern continent. We would know of their existence only by the rock paintings, stone tools and bones they left behind. Would they be classified as a dead-end population of Homo sapiens sapiens or a completely different human species? >> >>9885238 Sophisticated rock paintings have only been found in homo sapiens and their variation in skull shape isn't that different from other humans. Their DNA could be extracted which would reveal they're human and most closely related to the natives of new guinea. >> >>9885253 >Sophisticated rock paintings have only been found in homo sapiens and their variation in skull shape isn't that different from other humans. That is a general scientific consensus in our timeline, yes. Paleoanthropology might have had very different scientific evolution in this one. >Their DNA could be extracted which would reveal they're human and most closely related to the natives of new guinea. There would have been probably more than a hundred years of study on them already when the DNA was even found. They would have established a solid branch in the general understanding of our specie's family tree and it would be really hard to alter after that. And even we in this timeline do know for a fact that our species interbred with several other closely related species, because of that DNA. File: 1530898396307.jpg (91 KB, 720x720) 91 KB JPG Hey sci im a 2nd year undergrad of a biology program in my university and am thinking of what would be good ideas for a biological thesis early on in my 4 year course. To be quite honest, biology isn't my Forte (I was previously from an economics program and shifted into it), but I took the course hopefully to continue on to medicine. I do like the sciences though, it's just that I'm not intuitive enough so as to be able to come up with a great subject of interest in my thesis. Some of the previously, eye catching theses thay i have read from my upperclassmen, were Botanical taxonomy, whereas they identified some new species in a rural area from my country, as well as heavy metal filtering using different species of plants native to my country (this one earned a sponsorship) Those were great in my opinion, but I want to do some thing a bit undelved before in my field (or at Least minimally explored), and relevant, yet still doable as an undergrad. >> Does watching less anime decrease your faggotry - in your case no. You can now drop out of school >> >>9884980 >biology isn't my forte, i'm not intuitive or interested enough in it to have any research interests >i want to do a thesis I won't tell you to kys but i will recommend you seriously consider your motivations for what you say you want. Consider fine chemicals biomanufacture, either in fermentation vats or benchtop enzymatic catalysis. An ephedrine precursor, 1-hydroxy phenylacetone, is produced industrially from benzaldehyde by s. cerevisiae or z. priorianus fermentation. Or build a structure-activity model or solve an XRD structure of some protein related to cancer or some shit File: 3.png (42 KB, 1200x840) 42 KB PNG Last one died. I wanna know what the rate of change means, and what the instantaneous rate of change means. I guess what I'm asking is what's the meaning behind the line tangent to a point on a curve. 34 replies and 4 images omitted. Click here to view. >> >>9884661 What if x is complex? >> Suppose that solar energy became the international standard. Say that every household in every country has solar panels/generators, from the dirt-poor slum dogs, to the richest of elites. Now suppose that essentially everyone is capable of storing solar energy. What would happen to the sun if everyone had a surplus of stored energy? Would it be weaker/smaller? Energy cannot be created or destroyed, but it just gets moved around. If people take the sun's energy, keep it stored, and use little of it, what happens? >> >>9884549 [math] \begin{align*} \pi r^{2} &= x^{2} \\ x &= \sqrt{\pi r^{2}} = r\sqrt{\pi} \\ \end{align*}
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>>9885184
The energy that is stored has already been lost from the sun from being emitted from the sun.
So the sun wouldn't change as it already would have.
>>
How do y'all see the LaTeX script? Can't seem to find it online.

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>Bikes were invented centuries ago
>Still the most efficient locomotion engine known in all of science

Are they ever going to be topped?
>>
what would take more energy per person: a regular bike or a tandem bike?
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>>9884901
I bet those electric skateboards beat walking.
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>>9884949
I assume a regular bike would be more efficient, unless both riders are perfectly in sync on the tandem bike.

A bike is 98.4% efficient at converting rotational energy into kinetic energy. Humans are 30% efficient at converting food into energy. Ergo, the way to make a more efficient form of transport than the bike is to find something better than a human at powering it, or to make the human more efficient. Keep in mind that removing the human from the power supply means whatever you replace it with has to carry the dead weight of the human. Part of what makes bikes so efficient is that the rider is the engine (a rather efficient one at that) and passenger rolled together.
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How about (wind) sailing? You don't have to put extra energy for it to move.
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>>9885165
Yeah, let's all just wind sail to work.

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>drinking beer
>voluntarily killing your own brain cells
Why do brainlets do this ? Does not one of them value their intelligence ?
What is your position to heavy alcohol consumption ?
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>>9881742
2 or fewer drinks a day is moderation, according to those virgin losers of the american medical association.
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>>9881626
http://hams.cc/brain_damage/
As far as we know. Heavy drinking does cause irreversible effects. Moderate drinking does not.
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>>9881737
>>9881733
Proof that alcohol kills brain cells.
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>>9881626
Because what's the point of valuing intelligence when you don't have any? Plus it's only harmful in large doses.
People like you always believe themselves intelligent yet can't deduce simple shit like this.
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>>9881683
>Poison in moderation
aka medicine

Why is calculus II such a brainlet filter?
>>
Of the standard calc sequence II has always been my favorite. I actually found calc III (multi-variate) to be the hardest, but only because I fucking hated computing fucktuple integrals by hand.
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>>9884115
yeah but i passed calc ii without understanding it?

can you sum it up maybe??

like what's so special about integrals and differentials?? you just solve them?

is that all calculus is?? applying rules to equations??
>>
I don't know.
I almost completely blanked on the last fifth of the exam and somehow I got a B in the class.
I know more than one person taking it with me who failed too.
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>>9879905
I've always imagined the actor Jimmy Stewart mumbling, "Caaalculus." whenever I see these books. Please tell me I'm not alone.
>>
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Because you can't skate through the course looking at the solution manual.

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https://sciencevsmagic.net/castles/
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Neat.

>>
getting some qbert vibes

i can't concentrate on study linear algebra.

How do you concentrate on studying?
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>>9884992
Enjoying and understanding the subject is a hell of a helper in this situation.
I'd recommend you 3blue1brown's video series on linear algebra to make things "smoother" for you, so then you can learn from a textbook the mathy part.
>>
>>9884992
mindfulness meditation. At least 15 minutes a day. It is a proven way to improve concentration and directly change brain matter.

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When you receive a blood transfusion, how long does that person's blood stay in you? How long does their DNA stay in you?

Does apart of them become apart of you forever like when you get an organ transplant?

Can you experience any personality changes after receiving blood, like I've read some people have after organ transplants, like this one lady who got this heart from a dude who died for riding on a motorcycle, and she suddenly got a taste for beer...?

Like if I you were to get blood from a black person would you be better at dancing or from a gay person would you suddenly get a sense of fashion? I've read about personality changes after organ transplants but nothing on blood donation?

Does any part of the person who shed that bled to have injected in you become apart of you for a long term basis?
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>>9882866
Not him, but:
https://en.wikipedia.org/wiki/Hitchens%27s_razor
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I read about this one unique case where this man in his late 50's got a heart and liver transplant from some college aged man. And out of the blue he started liking anime, he went from watching Antique Shows to loving Dragon Ball Z.

Never picked up a joint in his life and now he can't get enough of the leaf of the marijuana plant. He also started swearing more frequently and found himself listening to One Direction.

He later found out that the heart and liver he received were from a young man who loved anime, smoked pot all day, and listened to one direction.

How is this possible?
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If you transplanted someone else's brain tissue into your own would it merge and become part of your brain?
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>>9883472
>>
>>9882594
I've heard of people getting whole leg or arm transplants and soon, full body except for head transplants, is there any science on personality change accompanying such massive transplants like that?

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>>9885169

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" Euler's identity is often cited as an example of deep mathematical beauty. The identity also links five fundamental mathematical constants. "

>The number 0.

Not a number. Could be considered a representation of infinity.

>The number 1.

A number but there are arguments it dosent have to be one.

>The number π (π = 3.141...).

Pi is not a number. But could be thought as a representation of infinity.

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>>9883475
Can you give someone 0 apples? No. If you tried you would not even start, only positive finite rationals are numbers.
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>>9882761
contrary to popular belief, op is not a faggot. he is merely a representation of infinity
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>>9885038
>Can you give someone 0 apples
0/10
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>>9883475
0 isn't a natural number
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>>9885055
based

>it takes humanity thousands of years to develop calculus, with the brightest minds exchanging ideas and building off each other
>I'm able to take a semester of calculus and figure out all the proofs easily

why were all these "great thinkers" all such retards lmao
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>>9883787
>humanity developed calculus
No, a few smart people developed calculus, while humanity was busy killing each other. FTFY
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would it be fair to say that given enough time and inclination, most people could develop all of math from scratch?
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>>9883818
figgit
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>>9884966
All of math? There isn't that much time in the world. Clearly, the fact that people didn't do it and have not done it to date despite a high inclination to develop more math indicates that there just isn't enough time to do all of that.
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>>9884928
You're probably memeing, but Pythagoras was a philosopher and spiritual teacher in addition to his mathematical leanings. Indeed historians debate whether Pythagoras' contributions to mathematics actually came from the man himself, or have were developed by some of his followers and later came to be attributed to Pythagoras.

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Can you visualize complex shapes mentally and rotate/manipulate/stretch them in a variety of ways?

This is literally the #1 most important trait for intelligence and the main thing people over a 130iq have differentiating them from people with a lower intelligence. All the top mathematicians and physicists have this ability. The task most correlated to general intelligence is the reverse digit span, where you're given sequences of increasingly longer numbers and have to repeat them backwards. The only way to do this efficiently is to "see" the number in your mind's eye and read the numbers off backwards, but you can only do this if you have the connections/"hardware" in your brain to do it.

And no, I'm not memeing. If you don't have this ability you won't be able to become a well renowned physicist or mathematician.
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>>9884626
>I wonder what software/hardware/spiritware (etc) is required to imagine extradimensionality and hyperconcepts.

more like what filters need to be taken down

>perhaps next level is including knowledge of physics (etc) in your imaginings/simulations of shapes and structures

just imagine graphs and tick marks and measuring insturments next to whatever else youre imagininging

classic example is the baseball bat swing and the spiral it forms
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>>9884872
I imagine the cube from the shape, and check the inconsistent edges.
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>>9884947
I was worried someone would be able to just rotate it around in their mind and compare it to the pictures. checking the inconsistent seems like the best way to do it for non-autists
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>>9884958
rotating the cube is a inneficient way, isn't necessary, the best solution is always the easiest solution
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>>9877767
spatial intelligence is related to brain mass and cranial capacity.

This is why europeans were able to outperform Africans and Arabs, and it is why the world will in turn be relinquished to the Asians.

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ITT: meme books
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>>9878920

You say this is a thread about books; I say this is a thread about meta-books. What is a meta-book? I don't want it to be a library. Think of something else. I am actually thinking of something, but I won't tell you.
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>>9882400
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>>9878920
Lrn2meme fgt pls
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>>9882400
>meta-books
>LIBRARY
books about books, there I solved it you imbecile
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>>9882389
Cats for working mats

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