[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y ] [Search | Free Show | Home]

Archived threads in /sci/ - Science & Math - 1710. page

This is a blue board which means that it's for everybody (Safe For Work content only). If you see any adult content, please report it.

File: 6538540-M.jpg (11KB, 180x285px) Image search: [Google]
6538540-M.jpg
11KB, 180x285px
Would you recommend this book ?
17 posts and 3 images submitted.
>>
not enough action

too much about sex and stuff
>>
>>8044119
Read Voyage of the Beagle instead.
>>
>>8044148
Why is it better ?

File: image.gif (281KB, 490x639px) Image search: [Google]
image.gif
281KB, 490x639px
Who is the most intelligent individual ever in his or her's field of study? Not necessarily prolific, but possessing capabilities far above the rest.

Von Neumann has my vote for mathematics, or perhaps Ramunjan. The latter's ability to self-teach is unparalleled, and the former was unbelievably adept at multiple fields.
20 posts and 4 images submitted.
>>
I think Minchio Kaku for physics
>>
intelligence is unquantifiable. they are the same intelligence as we are.
calling them intelligent has no scientific basis aside from the arbitrary labels you make up which are subjective opinions and no more
>>
>>8043896
Probably some random molecules and stuff spread throughout the atmosphere and in some organisms and the dirt. Give them time, they can do it.

File: 93b.jpg (77KB, 533x1600px) Image search: [Google]
93b.jpg
77KB, 533x1600px
How far can you go down?
40 posts and 3 images submitted.
>>
Riemann surfaces?
>>
You misspelled stoke's theorem
>>
>>8043891
Optimization
awesome, i feel really dumb

File: hyperspace.png (2MB, 1920x1080px) Image search: [Google]
hyperspace.png
2MB, 1920x1080px
Is there any point in manned space travel if it's impossible to move faster than light?

It seems to me that if humans aren't going to go out and colonize the galaxy there's no point leaving Earth at all. Might as well just send probes and fix up the planet we've got.
19 posts and 3 images submitted.
>>
>>8043802
Resources from nearby asteroids, m8. Also the exploration factor from making new settlements even in our solar system.

We definitely do need to fix our problems here on Earth, though.
>>
>what is time dilation
>>
>>8043802
You are a wise man, anonymous anon. Your words reflect truth and justice.

File: Voxels.jpg (495KB, 2180x1710px) Image search: [Google]
Voxels.jpg
495KB, 2180x1710px
1) Is everything quantized ?

2) Is time quantized ?

3) What are the implications of this on simulated reality ?

4) Are strings the 1s and 0s of reality ?

5) Are the smallest building blocks of matter identical to each other ?
36 posts and 2 images submitted.
>>
>>8043629
There are theories of everything that are quantized. No one knows what the correct TOE is. /thread
>>
if everything was quantized we would have not known circumference

prove me wrong fags
>>
This is actually a subject of my research, and AFAIK it's really an explored field. We're looking at topology problems from a quantized perspective, and then switching between discrete and continuous perspectives by changing the mesh resolution. It's fascinating stuff.

File: 1zcagw.jpg (91KB, 1200x1600px) Image search: [Google]
1zcagw.jpg
91KB, 1200x1600px
Did the big bang occur from a singularity or something else?
Suppose the big bang erupted from a singularity. How does an infinitely or near infinitely hot and dense state (containing all mass in the universe) existing as a singularity actually explode? Everything we know about singularities says that they do not overcome the effects of quantum gravity and continue to exist as singularities until they evaporate. Why then would a singularity, in a pre-big bang universe, with nothing else to effect it suddenly inflate?
What if the big bang did not occur from a singularity?
20 posts and 1 images submitted.
>>
Suppose the pre-big bang universe did not have pre-existing space for a singularity to inflate into and that the physical boundaries of space was the dimensions of a pre-big bang singularity. Theoretical 0 space.

If the universe began as a singularity then the universe's initial state was a singularity. Since there was only this singularity the universe was just this singularity. Because the singularity was all that existed and was infinitely dense, then in the perspective of the universe there was thermodynamic equilibrium because heat and mass are evenly distributed in a singularity. This means that the pre-big bang initial state was infinitely high entropy?
>>
>>8043591
>explode
Bait
>>
>>8043600
Supposing there is pre-existing space in the pre-big bang universe. With any amount of pre-existing space in comparison to the pre-big bang singularity there would be low entropy as all heat and mass is unevenly contained in one point.

File: 1461992622588.gif (2MB, 419x292px) Image search: [Google]
1461992622588.gif
2MB, 419x292px
Summoning all math & physics newbies:

I thought of an interesting problem to work on if you haven't learned it already. Let's work on it together, ruling out ideas and coming to a conclusion without cheating.

If you throw a ball up in the air at any given velocity, what will be the height of the ball the moment it begins to return to the Earth?

My lead so far is that two variables are responsible for this: the initial velocity when the ball is first released, and the gravitational acceleration constant since all objects accelerate the same in any given gravitational field regardless of mass.

I know the time it takes to reach the top should not be a variable in the equation because all initial velocities will behave the same way, so that if you throw two different weights up, they will reach a height proportionally.

So I have now g and V_i. I know that as the velocity increases, the height increases, so I can expect that in the numerator, and I know as the gravitational acceleration constant increases, the height decreases, so I can expect to see that in the numerator.

v_i / g

But now I'm stuck! I know I'm not taking into account when the velocity is equal to 0 in this expression.

Hmmmm... any thoughts? Don't spoil the fun if you know the answer already! I like to think as part of a teamwork effort. Thank you!
19 posts and 1 images submitted.
>>
>>8043584
Oops! EDIT:
>the height decreases, so I can expect to see that in the denominator.
>>
If you don't know Vi you won't know how high the ball gets, no way. Acceleration downwards by gravity acts on the speed of the ball. If the ball is going 100 m/s it will take longer for acceleration downwards to bring it to a complete stop than if it was going 50m/s
>>
>>8043589
But this problem is assuming you do know Vi. If you throw a ball into the air (a predetermined initial velocity), what will its height be when it reaches the top?

File: image.jpg (1MB, 3264x2448px) Image search: [Google]
image.jpg
1MB, 3264x2448px
I found a rock with a really odd feature. It's a small conical protrusion with concentric circles around it going down into the rock; the opposite side has the same, but less prominent.
I think it was found in the lower Morrison Formation.
Anyone have a clue what it could be? My friend thought if was a fossil, but I think it's an igneous rock. Not sure.
15 posts and 3 images submitted.
>>
File: image.jpg (1MB, 3264x2448px) Image search: [Google]
image.jpg
1MB, 3264x2448px
View of the obverse side
>>
>>8043506
its a button. press it
>>
File: image.jpg (1MB, 3264x2448px) Image search: [Google]
image.jpg
1MB, 3264x2448px
Different view of the top.

File: 1384833517044.jpg (208KB, 1920x1080px) Image search: [Google]
1384833517044.jpg
208KB, 1920x1080px
If you assholes are tired of answering and asking the same questions over and over, I'm going to build a fission battery.

Here's my plan so far:

Refine uranium 238 down to yellowcake. Guaranteed to get a some good radium from impurities in the ore, as well as likely to get some 235 from it, so that will likely end up being my fissile materials, where the 238 will be used to kick off the fission reaction.

This will take place in a chamber and here I could use some input about materials. I'm looking to keep the cost down and use materials I can harvest from domestic resources. I'm thinking my chamber will be made out of steel on five walls, with the sixth wall being made of something I haven't figured out yet, but probably platinum.

On the other side of the platinum wall I will have an oxygen chamber. The walls of this chamber will be shared by the other chamber, but separated by the platinum wall.

Steel walls of the reactor chamber will be lined on the outside with magnets, being sure to use only the positively charged side of the magnet. This will polarize the walls of the chamber to reflect protons.

The free-floating protons released from the reaction, will be collected by the platinum with the oxygen backing and harvested from the platinum wall as electricity.

Good so far?
16 posts and 3 images submitted.
>>
File: Xbro.png (194KB, 467x491px) Image search: [Google]
Xbro.png
194KB, 467x491px
tl;dr
>>
>>8043407
>Platinum
>Positively charged side of a magnet
I hope this is bait
>>
Not baiting, don't know if protons would be repelled by like charge of magnetic field. Probably wrong, in which case, still need a material that will repel protons.

Platinum wall works because natural electronegativity, unless you've got another, better option, or I'm misunderstanding something? Can harvest enough platinum easily.

Oregon licence plates consist of three letters followed by a three digit number (each digit can be from [0..9]).
While driving to work Seth plays the following game:
Whenever the numbers of two licence plates seen on his trip add to 1000 that's a win.

E.g. MIC-012 and HAN-988 is a win and RYU-500 and SET-500 too. (as long as he sees them in the same trip).

Find the expected number of plates he needs to see for a win.
Give your answer rounded to 8 decimal places behind the decimal point.

Help me /sci/, it's from project Euler.
16 posts and 1 images submitted.
>>
Does he win when the order of spotted plates is: 100->500->900?
>>
>>8043405
No, when numbers of TWO licence plates add to 1000 he wins.
>>
So, first plate is random
second wins 1/1000
third 1/1000
n-th 1/1000

Distribution is random, so on average he's gonna find 1000 after 50% of plates?

File: mood.jpg (106KB, 650x487px) Image search: [Google]
mood.jpg
106KB, 650x487px
Suggest me some good classical music to listen to while I study Math.

Actually, any music will do; just without lyrics.

tl;dr pls help anons i can't concentrate w/o mah musik. thanks guys <3
41 posts and 6 images submitted.
>>
>>8043311
Just listen to video game soundtracks. Usually does the trick for me
>>
>>8043335

Any suggestions? I'm not into video games much (used to be during grade school, but not so much in college)
>>
>>8043311
Chopin
Bach
Rachmaninoff

My personal favs

File: 1451442675372.jpg (73KB, 604x453px) Image search: [Google]
1451442675372.jpg
73KB, 604x453px
So I have a lot of friends who do psychedelics and occasionally they hit me up to try them(Which I don't).

I remember reading some psychedelic mushroom essentially destroys your current consciousness and replaces it with another(sorta like how you wouldn't be you anymore after being teleported)

Could have been bullshit, I dunno

Are these drugs safe?

Will the current me die if I take them?
32 posts and 1 images submitted.
>>
> Science is yet to prove or examine consciousness
> Read somewhere some retarded bullshit claim as if they know what theyre talking about
kid pls...
>>
>>8043312
>kid pls
I'm likely older than you(27)

I just don't know shit about drugs, I don't really believe in recreational drug use personally but I feel like the experience could help me become closer to my friends.

If it was just weed this wouldn't be an issue but psychedelics are fucking spooky man.
>>
>>8043322
Calm down, pick a nice day and try them. Always remember that no matter how fucked your perception is, after you sleep its gone and what you saw will be a faint memory.
Irreversible damage to your mind are very unlikely and if you consider yourself a strong willed person at all you should definitely try tripping.

Hello /sci/. I am asking a couple of the boards I respect for some advice and you are one of them. Please hear me out:

As a teenager I loved reading Philosophy. I devoured Nietzsche, Camus, Dostoevsky, Popper, Aristotle etc. etc. but when I finished school I decided to study physics because I fell for the "better do something objectively useful" meme and also because I felt that it would somehow validate me intellectually to do something most people percieved as being hard.

I have now finished my Bachelors and am in the first semester of my Masters and I'm hating it. I hated it from the start, pulled through but now I still hate it and the idea of enduring this for even another week seems so insanely insufferable to me that I've been honestly thinking about saying "fuck it" and studying my original passion, Philosophy, in tandem with something else. I very much enjoy programming, so maybe that.

Anyway, what do you all think? Any input on this matter? What the fuck do I do?

Student loans are not an issue. I am from a le free studying European country.
18 posts and 1 images submitted.
>>
>>8043215
you spout meme, unrelated authors and show absolutely no signs of actually knowing any philosophy

you sound like you want lazy continental memery. and that sounds like an absolutely terrible idea.

if you're sick of your degree you definitely need to change ASAP though, so tell us more about your interests, at this point it's only "i like meme philosophy and programming I guess" and that's shit
>>
>>8043215
if you absolutely must study philosophy just double major you fuckhead

but you're asking 4chan for advice on a serious life decision, you're already bound for failure
>>
>>8043228
You kind of illustrate my point. Wouldn't studying philosophy help me... well, learn more about philosophy?
In the last three years of my degree I barely read any non scientific literature and had very few creative thoughts that weren't clever ways of solving a tricky integral. In light of this I never really outgrew "meme philosophy" as you call it.

What would you call "good philosophy" btw? Russel, Wittgenstein, Sartre, Kant, Heidegger?

But to get back to my main point: I feel like I lost sight of my actual interests by burning all my energy on something that I don't actually want to do.

I have programmed in R, Java, Fortran, DrRacket and Python. I did quite a bit of scientific programming, including geostatistical methods and numerical methods of illustrating nonlinear systems. My Bachelors thesis focussed on the the fluorescence properties of eGFP. But of my studies I mainly enjoyed the parts where I got to program things, hence me saying I "enjoy programming".

If you need to know something specific to give me constructive advice please ask a specific question and I will do my best to answer it.

I'm a physics major and I typically dislike "pure" mathematics, but I'm loving this group theory stuff. Only problem is, I hate this book. It doesn't even discuss Lie groups, which are the foundations of field theories in physics.
Does /sci/ recommend any good, more advanced texts on group theory and/or other topics in math that are great for contemporary physics?
20 posts and 2 images submitted.
>>
Lie Groups are more a topic of Differential Geometry than they are Algebra.

They are smooth manifolds which also have the structure of a group.
>>
>>8043173
>I hate this book. It doesn't even discuss Lie groups.
Is this bait? I doubt there's a single introductory algebra book that discusses Lie groups. Not even Dummit and Foote does, IIRC, and that's as encyclopedic as you're going to get.

Pretty much everyone who's inexperienced enough to be reading Artin doesn't have enough background in manifolds to understand that.

That said, I think Knapp has written a book on them. I haven't read it but Knapp's algebra set is top-notch so it's probably worth looking at.
>>
>>8043173
For basic algebra with a view towards category theory (which can be useful in some areas of theoretical physics - mostly toy models such as topological field theories) I would advise Aluffi's "Algebra chapter 0".

For Lie groups, take up e.g. Knapp's "Lie groups: beyond an introduction". You could also try with "Geometry, topology and physics" by Nakahara, where he introduces many notions from mathematics (such as Lie groups) needed in theoretical/mathematical physics. However, it is a bit less detailed.

File: aluminium-box-section_3878_1.jpg (14KB, 640x498px) Image search: [Google]
aluminium-box-section_3878_1.jpg
14KB, 640x498px
If water is a shit lubricant for sex, why is it so good for cleaning our hands?
13 posts and 1 images submitted.
>>
>>8043127
if oil is a good lubricant for sex, why is it bad for cleaning our hands?
>>
>>8043127
I don't think you understand the difference between "solvent" and "lubricant".
>>
>>8043127
its not, most of us use soap. fucking slob

Pages: [First page] [Previous page] [1700] [1701] [1702] [1703] [1704] [1705] [1706] [1707] [1708] [1709] [1710] [1711] [1712] [1713] [1714] [1715] [1716] [1717] [1718] [1719] [1720] [Next page] [Last page]

[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y] [Search | Top | Home]

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/


If you need a post removed click on it's [Report] button and follow the instruction.
DMCA Content Takedown via dmca.com
All images are hosted on imgur.com.
If you like this website please support us by donating with Bitcoins at 16mKtbZiwW52BLkibtCr8jUg2KVUMTxVQ5
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.
This is a 4chan archive - all of the content originated from that site.
This means that RandomArchive shows their content, archived.
If you need information for a Poster - contact them.