[a / b / c / d / e / f / g / gif / h / hr / k / m / o / p / r / s / t / u / v / vg / vr / w / wg] [i / ic] [r9k] [s4s] [cm / hm / lgbt / y] [3 / aco / adv / an / asp / biz / cgl / ck / co / diy / fa / fit / gd / hc / his / int / jp / lit / mlp / mu / n / news / out / po / pol / sci / soc / sp / tg / toy / trv / tv / vp / wsg / wsr / x] [Settings] [Home]
Board
Settings Home
/sci/ - Science & Math

[Advertise on 4chan]

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 with [math] tags for inline and [eqn] tags for block equations.
  • Right-click equations to view the source.

12/20/15New trial board added: /wsr/ - Worksafe Requests
11/28/15New trial text board added: /news/ - Current News
11/12/15Name changed. WWE topics on /asp/ - Alternative Sports & Wrestling
[Hide] [Show All]


[Catalog] [Archive]

File: sciguide.jpg (9 KB, 200x140)
9 KB
9 KB JPG
https://sites.google.com/site/scienceandmathguide/
>>
Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework or helping you figure out your career path.

If you want advice regarding college/university or your career path, go to /adv/ - Advice.

If you want help with your homework, go to /wsr/ - Worksafe Requests.

Are the dangers of smoking overblown?
48 replies and 4 images omitted. Click here to view.
>>
>>7916121
Not to mention nicotine increasing blood flow and hardening veins. I stopped smoking a year ago and switched to vapes. I only buy supplies from places that post lab results of all their juices (they also sell hardware at cost (!!)) but I still know that it isn't good for me, just better than smoking cigarettes.

The nicotine really helps during those 12 hour days when the only way you can take all the classes you want and still get extra time in the lab and with TAs (the good ones) is by just getting all that shit done from 9 to 9 twice a week. Without my relaxing vape breaks I'd break. Also helps during long study sessions. It keeps hunger at bay and sharpens focus.

I'll keep vaping, but I've throughly researched all the negatives, and keep my consumption of nicotine down to 3mg per ml 6 ml a day. The harm from cigarettes was just awful in comparison.
>>
>>7916136
>nicotine increasing blood flow and hardening veins
lol, that does not happen
>>
>>7916140
It increases heart rate, without a doubt.
>>
>>7916140
Oh and increased heart rate can cause damage. Consistent nicotine use will slowly damage your cardiovascular system, without any of the benefits that an increased heart rate due to exercise would offer.
>>
>>7915693
Lungs were meant for air, not smoke. End of discussion, senpai.

File: DSC_0515.jpg (174 KB, 2896x1944)
174 KB
174 KB JPG
Do scientist have the technology to turn straight people gay?
>>
I'm asking for a friend
>>
>>7916266
I have a friend who claims to have a sexually attractive interest to females. He has no romantic attractive to female. My friend has a romantic interest in males. He's not sexually attractive to them. My friend is wondering if it's possible for science to change his preferences.

File: lisa.jpg (27 KB, 350x252)
27 KB
27 KB JPG
What was your family like /sci/? Were your parents intelligent? Did your siblings go to college?

My dad is an electrical engineer, intelligent but seems to hate his job and only care about sports stuff. Mom is para-legal but works as an athletic secretary for a high school. Sister is an art teacher.
21 replies and 3 images omitted. Click here to view.
>>
>>7916050
If you weren't cush as fuck you might be more invested in your own life. I'm trying desperately to become the first college graduate in my family, despite my uncles being in mensa and my second cousin being a fucking famous comedian and in movies. My family is sharp as shit but luck has not been on our side with untimely deaths, insanely expensive medical issues, and destructive divorces ruining or funds.

I'm trying so hard to make it work while you're a leach on your family. I'm not even mad about it, just astounded at how life can play out.
>>
>Mom is stay at home, old fashioned, raised on a farm in some small town in northern Canada. Among the smartest people I've known with not much past high school education.

>Dad is an alcoholic industrial mechanic from a poor family. I'm the first to be in university from that side.

>Brother is a manager for the railroad working up the ranks and other brother is a bus driver.

>Among the many from mom's side to study math.
>>
>>7916031
You can do it man just keep working hard.
>>
>>7915111
>From what I've seen she seems to be a really good nurse.
lel, nurses are quite wild. your mom has been good at spreading her legs.
>>
>>7915734
>cooked sweets to pay .
The best part is that you believe this.

File: Cc_x0qTW4AI3TXT.jpg (85 KB, 600x911)
85 KB
85 KB JPG
Why is it that /sci/ refuses to acknowledge that women are equally and often capable of doing equal and often better work than their male counterparts in STEM related fields?

Maybe you're better off sticking to /pol/

Pic related

File: PeriodicTableMuted.png (329 KB, 1920x1080)
329 KB
329 KB PNG
How do you remember all of this?
>>
>>7916085
Just having a pure interest and enjoyment in the subject.
It's called Selective Learning. There's faggots who can memorise hundreds of lines from films because they enjoy films, a chart with 100 or elements is nothing.

I remember 20 more elements and their placements than the average person I meet, because I was more interested in Chemistry than them, not because they're dumber.
>>
File: 1450911069968.jpg (36 KB, 500x469)
36 KB
36 KB JPG
>>7916085
Tell your instructor that if you wanted to memorize things you would study biology. The entire purpose of the periodic table is to be used as a cheat sheet, not for lazy teachers to assign as busy work for students.
>>
Just remember the important ones and your favorites. Properties help a lot. I thought scandium was another boring transition metal but then I learned it was basically a lanthanide.
>>
>>7916132
>implying f-orbitals
>>
>>7916085
you dont. there's no need to. though i think i remember the first 30 off the top of my head.

File: mitosis.gif (2.84 MB, 300x300)
2.84 MB
2.84 MB GIF
195 replies and 75 images omitted. Click here to view.
>>
Solar flare
>>
The Sea Angel (Gymnosomata)
>>
The male clownfish cleans and maintains his unhatched young. If he does not perform his job properly, the female will chase him off her sea anemone.
>>
File: pleased.png (30 KB, 373x231)
30 KB
30 KB PNG
>>7907971
You know the gene that codes for alpha and beta tubulin, so you pop GFP (green fluoro protein) or RFP at the end of the gene so that the proteins will be synthesized with fluorescent tags. After, the proteins will do what the do (alpha and beta tubulin form a hererodimer that then form a tube structure), and using fluorescence microscopy, you can see the different colors by exciting the fluorescent proteins with different wavelengths. These individual pictures are then layered together to make OP's pic.

Actin is made up of a different protein, so it will not contain any GFP and will not fluoresce.
>>
>>7914397

huh,from extrapolation,that is what he/she is saying.tell us you biofag

File: Consciousness.png (1.1 MB, 1000x520)
1.1 MB
1.1 MB PNG
How does something as immaterial as consciousness come from unconscious matter?
221 replies and 28 images omitted. Click here to view.
>>
>>7909625

>literally

dropped
>>
>>7916039
I swear you're underage.
Vague logic gets you knowhere in life, kid. Wake up and face the facts. Focus on what is, no what can be.
>>
>>7916082
Leave /sci/ immediately
>>
/sci/ has been taken over by loonies and tryhard teenagers are here. You want your answer? It's right here:
>>7912281

Consciousness is a goddamn rainbow. Rainbows aren't real or physical, you know that right? As soon as you try to touch it or get too close it vanishes, alright? It's not deep or anything.
Consciousness is just an electrical rainbow your brain makes with synaptic computations.
>>
>>7916039
The fuck are you on about?
Something that's not made of smaller things doesn't really exist? Why?
Neither of those models will work? Why not?
What does that have to do with language? How can you answer a question without any kind of language? How does language have anything to do with the way the universe works?
What in the fuck kind of half-baked philosophical framework are you basing this on and why didn't you state it in the first place?

File: 2630552_orig.jpg (67 KB, 946x367)
67 KB
67 KB JPG
How do people bear looking at stuff like this all day, every day, for at 3-5 years?

I have no idea how STEM managed to be so popular.
>>
>>7916234
Nobody does that in undergrad
>>
>>7916239
The stuff in undergrad doesn't look that much better.

Seriously how do people not get exhausted of it? I mean even if you are interested in what you study don't these mathematical expressions tire you? Maybe I am just a brainlet.
>>
>>7916239
>nobody does Navier Stokes in undergrad
You wot m8? You wouldn't do it in spherical coordinates like in the OP because that's just cruel and unusual punishment, but the traditional cartesian coordinate 33rd order system of PDEs still gets taught and someone used in fluid mechanics.
>>
>>7916239
>Nobody does that in undergrad
Maybe at your babby school

File: the-abundant-earth.jpg (88 KB, 700x648)
88 KB
88 KB JPG
Does /sci/ have a consensus on man made climate change?
46 replies and 3 images omitted. Click here to view.
>>
>>7916219
>That graph shows nothing. X axis is way too large to show recent meaningful human effect.
Are you retarded?

>And you are misunderstanding the climate models that have been used to show warming, as they have overestimated it.
No they haven't.

>There has been a pause warming in the atmosphere, where co2 caused warming would be most prevalent, even though co2 levels have continued increasing.
What is noise?

>The emails showed burying of unfavorable temperature data that showed this complete pause in warming, contradicting their models.
More conspiracy theories.

>The human effect has been greatly overestimated.
No it hasn't.
>You can't deny that.
Yes I can.

>>7916227
>there has been an undeniable slowdown in global temperature rise

Comment too long. Click here to view the full text.
>>
>>7915297
Whoops! It looks like you accidentally went to the wrong board. Did you mean to go to:
>>>/pol/
?
>>
>>7914008
If you think global warming is real then why do you keep breathing out carbon you bigot?
>>
>>7916258
Go look up the carbon cycle on Wikipedia.
Don't come back until you have at least the slightest clue.
>>
File: satellite2.gif (59 KB, 1000x859)
59 KB
59 KB GIF
>>7916219
>That graph shows nothing.
The graph shows the start of the interglacial was thousands of years ago and we should be in the cooling phase of the Milankovitch cycle.

>And you are misunderstanding the climate models that have been used to show warming, as they have overestimated it. There has been a pause warming in the atmosphere, where co2 caused warming would be most prevalent, even though co2 levels have continued increasing.
Troposphere temps and surface temps barely diverge, models accurately predicted warming in both. The pause in warming is a meme.

>The emails showed burying of unfavorable temperature data that showed this complete pause in warming, contradicting their models.
Where?

>We are still in an ice age, but just about out. If we were entering an ice age, warming would be beneficial, as ice ages have killed way more life than warming.
LOL we are entering an ice age... tens of thousands of years from now. Problems caused by rapid warming in the next few hundred years are a bit more important to be worrying about.

>The human effect has been greatly overestimated. You can't deny that.
I'm denying it. You don't know shit and yet you think you know better than climatologists. Read a textbook, dumbass.

why do women lack interest in intelectual pursuits on average?

File: Alcubierre.png (173 KB, 1004x465)
173 KB
173 KB PNG
/sci/entists, what are your thoughts on FTL travel? Do you think we'll ever figure out how to make warp drives without absurd mass/energy requirements? Will we be confined to our galaxy for the rest of our species' lifespan?
33 replies and 4 images omitted. Click here to view.
>>
>>7913474

I'm not familier with that anime.

>>7914063

>Superluminal motion of up to 6c has been observed in the inner parts of the jet of M87. To explain this in terms of the "narrow-angle" model, the jet must be no more than 19° from our line-of-sight.[4] But evidence suggests that the jet is in fact at about 43° to our line-of-sight.[5] The same group of scientists later revised that finding and argue in favour of a superluminal bulk movement in which the jet is embedded.[6]

In other words, an FTL group velocity.

>>7914080

I'm not the one who asked.

>>7914297

>http://m.phys.org/news/2014-01-theory-teleport-energy-distances.html

Yes, you can.


Comment too long. Click here to view the full text.
>>
>>7914275
I think the problem here is that prior to the MM and Miller experiment physicists believed that space was filled with the luminiferous aether, but in the wake of that experiment Einstein threw out the ether (only to reinstate it later on). Most physicists believed that the ether was non-existent and that therefore space was completely empty. Therefore motion would violate Newton's 3rd law.
>>
>>7916226
What the fuck?

No.
>>
>>7912946
>our species
Already thinking too small. "Our species" may not be our species by the time warp drives come around.
>>
>>7914550
>We have the technology to survive the trip - we need the blackhole now.
You are one dumb nig nog

File: 1248654324356.png (490 KB, 449x401)
490 KB
490 KB PNG
Is it true that Americans don't have Calculus in High School?
43 replies and 2 images omitted. Click here to view.
>>
>>7914106
Because our teachers try their hardest to scare everybody into thinking 90% of them are going to fail.
>>
>>7912264
No, the point oh high school education is to teach people how to THINK. Proofs are a great tool to practice critical and logical thinking, something that most Americans don't have. *cough* Trump is winning *cough*
>>
>>7912147
We do. But only the elite chosen ones are able to go to what we call Advanced Placement Caca-Lust.
>>
I'm american and took it as accelerated math,
>>
>>7914294
>She hated the kids who picked up calculus easily, and got angry if you tried to jump ahead.
This seems like it holds true for the vast majority of teachers. They get angry at students who have drive and ambition, something they never had.

File: download.jpg (21 KB, 268x268)
21 KB
21 KB JPG
Is there any way to chemically castrate myself?
>>
>>7916230
>>
>>7916243
preferably without growing tits or other complications. I am sure injecting antifreeze into my balls would fuck them up as well
>>
File: Enc9RHy[1].gif (1.33 MB, 240x208)
1.33 MB
1.33 MB GIF
>>7916230
Combustion is a chemical reaction, you could set your nuts on fire.

File: W7XuA9i.jpg (94 KB, 1200x787)
94 KB
94 KB JPG
Is taking notes actually fucking necessary?

I'm in year 3 engineering now and have written thousands and thousands of pages of notes. Realistically, I never really look back at them (maybe a quick glance while I'm doing a practice problem). Even before a test or a final I don't review notes, I just do practice problems.

My question is - Why do people take notes? Why not just write down the relevant formulas, make them make sense in your head through reading, and then just do practice questions?

This is coming from a guy who didn't take a single note during Calc I/II. I literally just went through the stewart book's practice questions and referred to the text instead of any notes.
23 replies and 1 image omitted. Click here to view.
>>
>>7915406
Your memory system consists of at least three processes.
First is encoding of raw information from sensory channels into STM,

Second is consolidation of the volatile STM into more durable LTM,
and finally the eventual retrieval of the stored information.

If you're the type of student that is easily distracted, your STM buffer will be filled with nonsense quick. Note taking keeps you extra focused and can help in the process of reconsolidating.

You're constantly swapping things in and out of STM for things coming from your sensory buffer or LTM. You want to keep relevant info in STM.
>>
I used to be studious as fuck about it, but stopped a year ago. Haven't looked back or regretted it a bit. I can actually focus in class, if the content is worth focusing on.

Honestly, most of the stuff is so easy I still don't focus. But that's more a function of going into an easy field than it being unnecessary.
>>
>>7916228
What field?
>>
>>7916242
Mech E.

The coursework is a joke, but they make up for it by drowning you in homework, labwork, and projects. Nothing says engineering quite like 60 hour work weeks, amirite?
>>
>>7915406
The physical act of writing something down helps you remember it.


[Advertise on 4chan]

Delete Post: [File Only] Style:
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[Disable Mobile View / Use Desktop Site]

[Enable Mobile View / Use Mobile Site]

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.