[Boards: 3 / a / aco / adv / an / asp / b / biz / c / cgl / ck / cm / co / d / diy / e / fa / fit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mu / n / news / o / out / p / po / pol / qa / r / r9k / s / s4s / sci / soc / sp / t / tg / toy / trash / trv / tv / u / v / vg / vp / vr / w / wg / wsg / wsr / x / y / ] [Home]
4chanarchives logo

Archived threads in /sci/ - Science & Math - 438. page


File: fig_hydrogen_helium.jpg (23KB, 526x258px) Image search: [Google] [Yandex] [Bing]
fig_hydrogen_helium.jpg
23KB, 526x258px
So wait, when hydrogen fuses to form helium, where do the neutrons come from?
8 posts and 2 images submitted.
>>
>>7792682
My ass
>>
>>7792682
Does the energy released from the fusion create the neutrons?
>>
>>7792695
don't you mean absorbed? how would it form from energy being released?

File: Untitled.png (31KB, 1058x526px) Image search: [Google] [Yandex] [Bing]
Untitled.png
31KB, 1058x526px
how does an electron avoid colliding with the proton given they're opposite charges? this is my current understanding. sorry for the bad handwriting, and knowledge, and understanding. i'm so sorry.
16 posts and 1 images submitted.
>>
>>7792662

https://en.m.wikipedia.org/wiki/Uncertainty_principle

I'm not a physics major but it seems that it's because of the uncertainty principle.

The product of the standard deviations of position and momentum are greater than or equal to h bar over 2. So the more precise you know the location the less precise you know the momentum. If the electron was in the proton it would have 0 momentum and you would know its position, this is impossible.

It's to do with the wave nature of matter, something about the position and momentum are fourier transforms of each other so this causes the inequality
>>
>>7792698
so it has nothing to do with potential gaps or the pauli exclusion principle? damn i was far off.

it makes sense though, i was aware that position and momentum can't be measured without influencing one another, but i didn't know fourier transforms actually came into play. that's pretty damn fascinating.
>>
>>7792698
>know
The universe doesn't give a fuck about what some mouthbreathing monkey shits know, fuck you and your shitty fucking principle.

Is this a good graphics calculator? If not, can you recommend one under $50 Aussie dollars.
12 posts and 4 images submitted.
>>
>>7792131
get a used TI-89
>>
>>7792133
Heard Texas are alright. I'll have a gaze at the old eBay
>>
This?

File: gpa.png (5KB, 187x137px) Image search: [Google] [Yandex] [Bing]
gpa.png
5KB, 187x137px
ITT we brag about our GPAs because we're a little insecure about our intelligence.
55 posts and 10 images submitted.
>>
>>7792041
I finished my master's with a 4.0. It felt awesome until I realized that I was just compensating for finishing my BS with a 3.75.
>>
File: x_74c23cd4.jpg (77KB, 474x604px) Image search: [Google] [Yandex] [Bing]
x_74c23cd4.jpg
77KB, 474x604px
>>7792041
>sem: 3.2
>cum: 3.5
>depression: increasing
>>
>>7792049
or running away from adulthood

File: Tesla.jpg (26KB, 435x535px) Image search: [Google] [Yandex] [Bing]
Tesla.jpg
26KB, 435x535px
Underrated and obscured by corporatism or overrated by fan boys?
24 posts and 1 images submitted.
>>
What is up with teslas death ray? That shit is cool, i wish it was real.
>>
>>7792035
>obscured by corporatism
He's not obscure though. There's an SI unit named for him and he's huge in popular culture. He didn't get rich and famous like Edison, but there's only a handful of scientists and engineers who get that kind of success.

There's also over-inflation of his accomplishments. He did not invent DC power. DC power grids existed before he was even born.
>>
>>7792051
Do you think he was smarter than Edison?

File: 1414944773086.jpg (119KB, 926x1033px) Image search: [Google] [Yandex] [Bing]
1414944773086.jpg
119KB, 926x1033px
Is silicon-based life a legit possibility?

pic unrelated
7 posts and 1 images submitted.
>>
>>7790908
Not really, silicon ionizes too easily to maintain large covalent systems.
>>
Organic (carbon) chemistry is extremely diverse. Silicon is tetravalent like carbon but doesn't produce such rich chemistry, as far as we know. This limits the complexity of any life-form expected to emerge from silicon chemistry. It might also limit the means by which chemical automata could form under moderate conditions, or abiogenesis.

The Milky Way is about 4600 ppm carbon and 650 ppm silicon, so carbon also wins in abundance. I suppose it's unlikely that the silicon fraction would often be concentrated either.

Probably possible, but unlikely and limited.
>>
Silicon isn't anywhere near as compound-forming like Carbon is. It's been noted that over 90% of the compounds you commonly run across as a living organism, contain Carbon. Carbon's versatility in forming compounds makes it a primary organic element. Combined with Hydrogen, Oxygen and Nitrogen, you end up with a CHON biosphere, probably in all instances where biospheres form.

File: maxresdefault[1].jpg (72KB, 1280x720px) Image search: [Google] [Yandex] [Bing]
maxresdefault[1].jpg
72KB, 1280x720px
How clinically-useful is the rectal exam in asymptomatic patients, or as a regular screening tool? The guidelines keep reducing its recommended usage. Have doctors been needlessly fingering people's asses for decades?
25 posts and 3 images submitted.
>>
>>7789508
>How clinically-useful is the rectal exam in asymptomatic patients

Quite small in asymptomatic younger patients.

In older patients ~50% of rectal cancers can be palpated. Also prostate cancers can be palpated.
>>
>>7789508
>Have doctors been needlessly fingering people's asses for decades?

not needlessly, for pleasure
>>
>>7789508
I'd love for someone to massage my prostate to be honest family

File: Pale_Blue_Dot.png (563KB, 614x453px) Image search: [Google] [Yandex] [Bing]
Pale_Blue_Dot.png
563KB, 614x453px
Is there a generic formula for performing a modulus operation on a number that is in base 'n'? If not, what's the best way of performing a modulus on a very large number that is not in base 10?
17 posts and 2 images submitted.
>>
>>7789303
yes

if its negative, times by -1
>>
>>7789303
That picture is sexy.

More.
>>
>>7789674
>>7789677
/sci/ is filled with highschoolers and 20 year old undergrads unfortunately for you, OP

Is nuclear power safe yet?
51 posts and 7 images submitted.
>>
>>7788284
Not unless they pump money into Thorium research
>>
>>7788284
Yes (https://en.wikipedia.org/wiki/Nuclear_power).
In fact, it has been shown that background levels of radiation are lower around nuclear power plants than elsewhere.
/thread
>>
>>7788284
yes

File: p.png (173KB, 2000x2000px) Image search: [Google] [Yandex] [Bing]
p.png
173KB, 2000x2000px
Mods are napping. Post algorithms you've programmed.

More languages the better.
76 posts and 25 images submitted.
>>
Why would the mods care about algorithms?
>>
File: GCD.png (5KB, 341x138px) Image search: [Google] [Yandex] [Bing]
GCD.png
5KB, 341x138px
Starting off very simple, GCD of two numbers.

Euclid method.

Math enthusiasts welcome, post some hardcore algorithms.

Programming enthusiasts welcome, post some hardcore algorithmic code.
>>
File: SQRT.png (13KB, 486x181px) Image search: [Google] [Yandex] [Bing]
SQRT.png
13KB, 486x181px
Still keeping it simple, square root function, more python jargon however.

Newtonian method if I'm not mistaken.

The conditional statements [if statements] are there just for error handling, and do not really play a part into the algorithm.

File: 1449979370731.png (139KB, 256x256px) Image search: [Google] [Yandex] [Bing]
1449979370731.png
139KB, 256x256px
Three things appear to exist: Location, directionality, and speed. Relative motion necessitates the existence of an absolute.

Humans are machines. Inside each of us various particles are moving around, changing their arrangement, being gained, lost. We're on a planet. That planet is rotating. It's also revolving around the sun. The sun and our solar system is being pulled around by nearby systems, which are all moving within the gravity well of the supermassive black hole at the center of the galaxy. The galaxy as a whole is being pulled around by other galaxies. Etc.

Given a means, I can move around. I am not everywhere, therefore, I can change the "somewhere" that I'm presently occupying. However, given all of the above, if I move even a few feet where am I really moving? What is my actual motion through space when tethered to something that itself is undergoing such a large amount of motion? What is my absolute location and how is it changing? This would require a perspective that encompasses the whole of all things, but clearly, an absolute must exist.

Therefore, somewhere, there might be a stationary object. An object that is not moving in any regard. Unlike all else, it is stationary. Only by knowing and being everything could you realize it's you who's moving, and not this object. The universe is probably binary. Either something is or is not moving. If it is moving, "speed" is actually a localized distortion of time. Distance isn't actually contracting, the object moving is subject to fewer ticks per any given interval, so as far as it can be aware, distances are shorter. The stationary object would exist in realtime, and would be undergoing the most rapid change.
115 posts and 4 images submitted.
>>
I like this idea, but all forces act on both sides, hence making an unmoving object impossible since it would be influenced through the stuff it is influencing
>>
>>7777872
It would need to be in some sort of system that nets out into an equilibrium state, even if only briefly.
>>
the stationary object you're looking for is called the observer.

File: image.jpg (10KB, 200x112px) Image search: [Google] [Yandex] [Bing]
image.jpg
10KB, 200x112px
how do jellyfish live
8 posts and 1 images submitted.
>>
they have good life and less depression than the average humen i think
>>
they're an amalgamation of a simplified peripheral nervous system with no sign of central cognition or spinal relaying. they have asexual reproductive cycles and are able to fend off adverse aging effects via some sort of DNA enzyme they can produce but we can't which allows for higher amount mitosis before corrupted RNA is displayed. they also have an efficient metabolism given their ambient body temperature regulated in the water with high level of consistency, and have good defense measures with their small hooks which can inject strong neuropathic compounds into its prey or predator, rendering them immobile.
>>
>>7792688
okay thanks

File: FB_IMG_1450215510227.jpg (70KB, 878x247px) Image search: [Google] [Yandex] [Bing]
FB_IMG_1450215510227.jpg
70KB, 878x247px
Help me out /sci/

>240 tickets to a concert
>Expensive ticket cost 200$/each (x)
>Cheap tickets cost 100$/each (y)

a,
x+y = 240 (1)

b,
200x+100y = 33 000 (2)

How many tickets of x,y is there?


pic obvs not related.
11 posts and 1 images submitted.
>>
Look up diophantine equations and solve for yourself. You fuck
>>
240 - y equals x. Plug into the second equation. Solve for x. Then solve for y
>>
>>7792676
LMAO

File: 003.jpg (114KB, 1920x1080px) Image search: [Google] [Yandex] [Bing]
003.jpg
114KB, 1920x1080px
Can anyone solve this ?.
https://www.youtube.com/watch?v=tKe_Hpsl09o
3 posts and 1 images submitted.
>>
>>7792472
hey shithead,
your other thread, posted only half an hour ago, is still up >>7792432
>>
I'm sorry, this is the first time I use 4chan

File: FB_IMG_1453072705247.jpg (16KB, 500x292px) Image search: [Google] [Yandex] [Bing]
FB_IMG_1453072705247.jpg
16KB, 500x292px
Do ants have speeds? Are they always standing or running?
4 posts and 2 images submitted.
>>
i don't think their muscles are capable of anything other than 100%. i've never seen them be slow, and i can't picture a need for it.
>>
Has anyone really been far even as decided to use even go want to do look more like?
>>
>>7792455
I've seen ants going both slow and fast. So yes.

Pages: [First page] [Previous page] [429] [430] [431] [432] [433] [434] [435] [436] [437] [438] [439] [440] [441] [442] [443] [444] [445] [446] [447] [Next page] [Last page]
[Boards: 3 / a / aco / adv / an / asp / b / biz / c / cgl / ck / cm / co / d / diy / e / fa / fit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mu / n / news / o / out / p / po / pol / qa / r / r9k / s / s4s / sci / soc / sp / t / tg / toy / trash / trv / tv / u / v / vg / vp / vr / w / wg / wsg / wsr / x / y / ] [Home]

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.
If a post contains personal/copyrighted/illegal content you can contact me at [email protected] with that post and thread number and it will be removed as soon as possible.
If a post contains illegal content, please click on its [Report] button and follow the instructions.
This is a 4chan archive - all of the content originated from them. If you need information for a Poster - you need to contact them.
This website shows only archived content and is not affiliated with 4chan in any way.
If you like this website please support us by donating with Bitcoin at 1XVgDnu36zCj97gLdeSwHMdiJaBkqhtMK