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Archived threads in /sci/ - Science & Math - 76. page
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Can you solve this?
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>>8468098
$x-19+17=63$
$x-19+17=63$
$x=65$
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depends on the locale

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Does a deep undersea cable have any impact on the power required to transport electricity (due to pressure) or is it not affected at all since it's just the flow of electrons inside the insulated material?

I don't want to hear about fibre optic. I'm talking about electrical cables carrying a flow of electricity between the sea floor and the surface.
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I wouldn't suppose any significant effect, then again, my understanding is from a mechanical engineering education.
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>>8467726
High pressure influence on conductive coefficients of paramagnetic materials is about what I think you're interested in, there son.

Off hand, I dunno if impedance, resistance, resistivity, the skin effect, and so on are influenced by high ambient pressure.
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>>8467726
>flow of electrons
you mean the flow of electric charge?

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What should we do to convince Trump and his supporters that climate change is a real issue?
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No one on this board believes climate change exists.
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>>8467076
this is /sci/ not /pol/
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>>8467076

Fuck

>Consciousness is a product of stable matter organisation in Spacetime with the resultant ability of interfacing with energies outside of the current understanding of matter and spacetime, eg, psychic phenomena

Y/N?
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>>>/kys/
>>>/x/
>>
>Material organization in Spacetime is a product of unstable Consciousness with the resultant ability of interfacing with Objects lower than the current Form of Divinity, eg Material Phenomena

>>8466237
>>
>>8466609
>consciousness is still within the realm of the paranormal

>>>/s4s/
>>>/pol/
>>>/his/
>>>/kys/

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Now we have an answer to that question
>https://nces.ed.gov/surveys/piaac/faq.asp
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>>8466047

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x =/= 1

x = ?
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x =/= 1 is the answer
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>>8464133
those dubs are a bretty good answer too desu, i just checked those dubs, that's what i just did
>>
/= 1

youre welcome op

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What's it like to study mechanical engineering?
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>studying mech engineering
>thermo lab
>refrigeration cycle experiment
>have to write lab report
>know R12 is in two phase region after throttling
>temperature and pressure indicate it is subcooled
>yeah.....some R22 was mixed in there a couple years ago, just assume pure R12
How the fuck am I supposed...
>>
boring as fuck
so i switched majors
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>>8458886

I keep hearing this from people. That Mech-E is boring and does not correlate to the actual job market in theory or practice.

What then is the preferable degree? Mechatronics? Manufacturing Engineering? Computer Science?

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There is no consensus on climate change

Not enough data, too many memes
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>>8470440
>There is no consensus on climate change
>Not enough data, too many memes
[citation needed]
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>>8470442
Can't disprove a negative
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>>8470442

> posts another meme

Can someone translate this abstract for me?

>Genetic Similarities Within and Between Human Populations

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1893020/

>The proportion of human genetic variation due to differences between populations is modest, and individuals from different populations can be genetically more similar than individuals from the same population. Yet sufficient genetic data can permit accurate classification of individuals into populations. Both findings can be obtained from the same...
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maybe >>>/pol/ can :^)
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>>8470353
Why do you /pollacks do this?
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>>8470571
whats a pollack?

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>muh 97% of scientists believe in global warming
>if you don't believe in global warming you are a racist conspiracy theorist

I believe global warming is happening naturally but its unstoppable and we can't do anything about it but adapt.

So I'm so glad you smug global warming fags and treehuggers got eternally BTFO.
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>>8469629
>believe
>>>/x/
Remeber to sage!
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>>8469629
Good for you. But the scientific consensus does support the idea of man-made climate change. Sure it does happen naturally, but we've drastically accelerated the process.
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>>8469640
>(((scientific consensus)))

You mean a group of people refusing to consider any alternative research to the mainstream climate change narrative because they're too scared to lose grants and tenure.

Give it a generation or two and climate change will be replaced by another theory.

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it's not okay to make fun of some people with disabilities that are the manifestation of their genes, but once we get to things like height, intelligence, and attractiveness, genes don't matter.

You wouldn't tell someone that has genes that results in them having a weak immune system which results in them having a disadvantage at life to stop complaining or work harder if they claim people with healthy immune systems are lucky, but it's okay to shit on semi normal people for having disadvantages phenotypical properties that are a manifestation of...
>>
it's actually all not okay
>>
is there a gene that leads to a higher tendency for one to shit post on 4chan? If so, murder yourself.
>>
>Why isn't the world a perfect safe space?

The world isn't going to pander to that kind of thinking. And a lot of people ABSOLUTELY do mock people for disabilities that are the manifestation of their genes.

t. someone with shitty genes.

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Any particular reason why we aren't colonizing the moon?
Why go through all the effort of trying to colonize Mars and sending people there? The moon is much closer so it wouldn't take as money and man power to get there and set up atleast a base or two.
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>>8469247
The moon's gravity is even shittier than Mars

A lunar day is 29 days long whereas Mars is a near perfect 24 hours

The moon is covered in regolith dust that is like a cloud of tiny razor blades because the thing has no natural atmosphere or erosion to smooth them out, it's like the whole fucking place is made out of Captain Crunch
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>>8469247
Actually most space agencies are looking into a moon habitat. Moon bases are possible, but Mars visitation is essentially theoretical at this point.
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What's the point of colonising the moon? Let's just build a camp on a desert, lock there up couple of people and make them live on tinned food and limited water supply, buses are cheaper than aircrafts, they rarely blow up, it's easier to help the people should something go wrong and it will give us as much scientific knowledge and advancement as lunar base

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How hard would it be for a lone wolf or a terrorist cell to develop an antibiotic-resistant bacteria and spread it to livestock shows or large gatherings of people?

I imagine it wouldn't be tough at all, especially with a basic setup and some skilled people. Like the poison gas attacks by that cult in Japan, it would take time but could be devastating if executed correctly.

Why isn't this done?
>>
By the way, I tried posting this on /pol/ and gave up after all they posted were frogs and trump memes.
>>
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>>8469237
Riggers went to the polls and rigged their hardest to make America great, again.
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>>8469243
GOD FUCKING DAMNIT, I VOTED FOR TRUMP YOU SHITPOSTERS

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I have a stupid taxonomical question.
If dinosaurs are reptiles and birds are dinosaurs, why aren't birds reptiles?
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>>8469132

>why aren't mammals amphibians
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I don't think dinosaurs are considered reptiles
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>>8469132
>If dinosaurs are reptiles
wrong.

>>8469432
>I don't think dinosaurs are considered reptiles
right.

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Why can't we adapt to climate change 50 years from now rather than prevent it? Climate change prevention costs billions of dollars and puts millions out of work.
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>>8468940

You mean evacuate all the millions of people from all the coastal cities? And completely move all crop farms as well?
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>>8468949

>You mean evacuate all the millions of people from all the coastal cities?

Why not? There are huge swaths of land for them to migrate to.

>And completely move all crop farms as well?

We'll have fucking lab-grown food by the time it's necessary.
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>>8468951
>Why not?

This will almost certainly be comparable or even worse than the cost of preventing climate change.

>>8468951
>We'll have fucking lab-grown food by the time it's necessary.

LOL

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Why does stuff hurt more when it's real cold out?
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>>8468930
Plz give us an example for a "stuff"
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>>8468948
Like if I tripped and scraped my knee on the ground or like closed the door on my hands or something, it seems to hurt more on a frigid winter day than say during the summer

Why is this? Is it the temperature change from the body to the outside that causes this?
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>>8468953
Cold stimuli can activate pain receptors, same as heat btw

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Hey guys, thought you might enjoy some pictures of the new fuel cell for SpaceX.

A few years ago one of the large manufacturing buildings in our small town got bought by a bunch of strange suits, supposedly by Boeing for special projects. Extremely tight security.

Even the shipping containers outside had biometric locks on them.
>>
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But a few days ago they brought this big fucker out and loaded it onto a barge, supposedly for "destructive testing".
>>
Less than 24 hours later, it has already returned seemingly intact.

They could not have gone very far at all, so everybody is pretty curious about what they actually did.
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I saw a few man-sized silver tanks that were being moved off the barge as they were venting.

My best guess is they only filled it partially and will be cutting the tank open to examine how well it held up. Supposedly the last one exploded due to a reaction with the resin in the carbon fiber and the liquid oxygen.

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Who else's Calculus professor is belligerent and psychotic?
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Who else's Arithmetic professor is belligerent and psychotic?

We had our midterm yesterday and the numbers we had to add were unreasonable. Four digits each! Here's hoping for the curve.
>>
Who else's Computer Science professor is belligerent and psychotic?

We had our midterm yesterday and it asked for a polynomial-time algorithm for the traveling salesman problem.
>>
Who else's chemistry professor is belligerent and psychotic?

We had our midterm yesterday and it asked for a concise and enantioselective synthesis of taxol.

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Hey guys. The recent election has got me wondering the correlation between human biochemistry and political views.
It's no secret that men lean primarily conservative and women lean more liberal, but I haven't found any credible sources. Link related makes sense, but doesn't link to any data.

>>
Though I don't have any studies to back this up, I agree with that a general correlation is extremely likely. The reasoning being that the same hormones associated with cooperative rearing and caregiving cause sympathy and concern for others well being before ones own well being. This leads to support of social programs like funding for education and at the extreme, welfair programs.

Hormones that are higher in males are associated with aggression and selfishness, causing high testosterone people to lean toward capitalism, lower taxes (less for them, more for me),...
>>
>It's no secret that men lean primarily conservative and women lean more liberal

Actually from a biological basis it's the opposite, Men are more liberal and Women are more conservative. A good example of this is reproduction.

But of course when politics is in play it really depends on the economic models involved. Models involving capitalism go both ways since while methods in maintaining old wealth require a conservation of valuable resources. Methods in acquiring new wealth require far-reaching actions that tend to break norms.
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>>8468631
i think any genetic correlation will be alot more than just hormones.

im sure youll find a study like that here.

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https://arxiv.org/abs/1611.02269

this paper was published a few days ago, any thoughts on it? is gravity an emergent phenomenon? have we been getting cucked by einstein this entire time?
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>>8468539
This is interesting.
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>>8470051
apparently it's TOO interesting for other /sci/ posters to look at.
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>>8470085
It's too advanced. How many people on /sci/ do you think are doing graduate-level physics?

Explain how this is wrong.
>>
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>>8468453
the left track doesn't kill infinite people
https://en.wikipedia.org/wiki/1_%2B_1_%2B_1_%2B_1_%2B_%E2%8B%AF
downvoted, unfriended, blocked, saged and reported

kys brainlet
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>>8468453
1+1+1+...= 1+(1+1)+(1+1+1)+...=1+2+3+4+5+...=-1/12
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>>8468453
$\zeta(0)=-1/2$

Is somebody doing astrophotography or amateur astronomy?
>>
Celestron astromaster 130 eq with my S7 active
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>>8468451
I have a friend who does.

He even built a telescope with a 1m lens from scratch - including grinding down the lens.
>>
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I do.

Canon 6d, 190mm f/5 corrected Newtonian, ISO 3200, 31x60s exposures, + darks.
It was the first image I took with my new Canon, before that I had a cheap DLSR which was not sensitive.
It was a bugger to flatfield because I was using a guide probe which made a weird vignetting thing and I never really had to bother with flats with my previous camera which had a smaller sensor and was thus less affected by the flatfield. I had to make an artificial flat from my subs, that took hours but worked pretty well.

Why are they so awesome?
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>>8468336
Because russian mathematicians are awesome. Mathematics was always like a popular sport for russians and they had many clubs where children learned math after school. Unlike other sciences the russians didn't shorten the sponsoring for math during WW2 and the cold war (the government didn't understand the math and didn't find traces of dangerous mindset, kek). That's why people like Perelman had a chance to develop their talent.
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>>8468336
But Rudin and Tao's textbooks are far superior to Zorich? What are you on about?
>>
>>8468566
and Königsberger

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>sit in on digital signal processing course to see how much of a joke engineering courses are
>professor says Dirac delta "function"
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>>8467787
And what would you call it?
>>
>>8467787
>sit in on calculus class
>professor writes "dx"
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>>8467787
get a life, m8

I'd like to take a Linear Algebra in Python class next semester and I want to study on my own before I actually take the class.

Does /sci/ have any preferred college-level textbooks I can use to supplement online studying?
>>
anton's elementary linear algebra
>>
Use David Poole's book. It's the only book I've seen (besides the one that you posted) that has good reviews.

Other decent books are:
-Hoffman
-Berberian
-Leon
-Shilov (personally don't recommend, but people like it)
>>
>>8466467
as far as engineering-type algebra classes go the book in your pic is great.
i did an algebra for physics class and it was perfect for 70% of the course .

Why is pi so revered while nobody gives a shit about e? I have never seen 50 digits of e plastered along the wall of a math office or people trying to memorize as many of its digits as they can, yet I've seen it for pi.

Is it just because most people know about it because "hurr hurr pie?"
>>
>>8463579
e is pretty revered among college students. Probably more so than pi. But pi is obviously slightly more accessible to the public so outside of college you hear more about it.
>>
the first digits of e are actually easy to remember
2.718281828...
>>
You can't bake an e on e day fucktard

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What are some chemistry experiments I can do at home?
>>
Fine. Science is dumb anyway.
>>
Bleach + ammonia.

Fun stuff.
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>>8462243
The domestic cellulose combustion experiment.

Apply heat and oxygen to the load bearing cellulose members of your dwelling, you won't believe what happens next!

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Hi /sci/,

Is there any body of scientific work that you know of which looks at exploring metaphysical concepts such as the soul or related spiritual concepts?
>>
>>8459612

theres a guy called sam parnia who does studies on near-death-experiences for the sake of medical research... the popular media interprets this in terms of life after death, souls etc but it really isnt... however you can think of it that way if you want!
>>
>>8459612
get out you bitch
>>>/x/
>>
>>8459839
Thanks
>>8459842
spOokY!

PIC RELATED, IT'S DONE, OVER, KAPUTT!

WHAT A GENIUS OF THE TIMES, THIS IS HISTORY RIGHT HERE!
>>
absolutely savage.
>>
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>>8462842
BASED
A
S
E
D
>>
you can't write 2z tho

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Sorry if this is not a particularly liked subject in /sci/, but I'd like to ask. I'm almost at a point where I can apply for specific programs on the B.S. level. When I was young, I wanted to become a scientist, and if I was capable of doing it, I wouldn't be opposed to doing it (maybe in my later years). However, when looking back at many of my biology classes, I noticed many of my professors were Ph.D's, had done research for some years, and then went into teaching. When I was talking to those professors, one taught entry-level biology, one taught microbiology,...
>>
>>8470933
>>
>>8470928
So which question do you want answered? All we can see is a convoluted blogpost that doesn't get to the point of your query. Mind rephrasing in a few sentences instead?
>>
>>8470939
1. Why does academia get next to no funding?
2. Why is grad school, doctorate school, and medical school so grueling and not conducive to a family life?
3.If you are female and in a stem field, do you feel that your program or focus does not have an anti-maternal attitude?
4. If advanced programs have such a high divorce rate, why does no one seem to care?

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