Archived threads in /sci/ - Science & Math - 1574. page

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>/x/

>>8171475
Yes. Carbon monoxide and EM fields have long been suspected as the cause behind "haunted houses". All the pictures are fake including this one.

>>8171475
>I'd ask /x/ but those people will believe anything.
Don't act like you're above them, you're just as stupid as they are

>>8171452
What is your job?

>>8171465

Work in financial markets for one of the big banks. Mostly FX, some IRM stuff.

>>8171467
And you're surprised that you forgot how to do physics?

>>8171440
Quark-quarks, of course.

Memes

Packets of energy

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>>8170928
>high likely will it only be a colony of bacteria

>>8170928
You need comets.

>>8170928
you're gonna have to have a sterile enviornment, oh and also arsenic cyanide ammonia electricity you know shit that can kill you

That's a long exposure picture, you won't ever see skies like that with an unaided eye.

>>8170851
I grew up in the country. Town about 10 miles west of the farm.

There was still some pollution but you could see the milkyway.

Op pic uses special low light filters and long exposures.

Another way to see the sky like that is to go out of town and use night vision goggles. Same effect

It's a lot more blue than that. Pretty sure that image is false color, or at least heavily filtered.
And you'll see maybe half the number of stars.

You don't have to go out to the middle of nowhere to see this though. I live in LA and a two hour drive north into the parks will provide a clear sky like that one.

>>8170781
its the slope of the first derivative?

I guess I haven't really answered it but another interesting way to think about it would be;

Why is the derivative of a distance-time graph equivalent to a velocity-time graph? Same for v(t) to a(t) [acceleration]

>>8170861
I can understand derivatives in terms of velocity / acceleration
But i'm having a hard time picturing (or understanding) how inflection points are given when setting the second derivative equal to 0

>>8170880
because the derivative of a generic differentiable function f(x) is the slopes/tangents of f(x)

visualising this: where f(x) has a maxima/minima the slope is zero so f'(x) will be zero at that point

where f(x) is increasing/decreasing the greatest it will have a peak for f'(x)

continuing this logic you can see that when you take the derivative of f'(x) the peaks become zero's on f''(x) which tell you where the slopes of f(x) are the greatest and the neighbouring points have positive or negative values depicting the concavity

>>8170721
cocaine

>>8170721
1.) Pleasure
2.) Pain
3.) Need
4.) Love
5.) Hate

>>8170721
Amphetamine based drugs

>>8170476
Phys.org's fb page is p good, and mit tech review

>>8170476
Arxiv

reddit

>>8170406
Seems like there are considerably worse genetic traits that are being kept alive.

Maybe it just takes all kinds.

It doesn't have a big enough impact on health to make people croak before having sex.

>>8170406
>unhealthiness = less fitness for mating

Not on 2016. If anything the druggies will be the most irresponsible and the most likely to breed.

That said, addiction is not a genetic thing, we all feel pleasure and if we were to decide that pleasure is more important than everything else then you are literally addicted by choice.

>>8170262
Yes, and yes.

Problem right now is fabrication.

carbon nanotubes greatly lose strength for every atom out of place.

so 10 atoms out of place on a cable that should have gigatons of tensile strength. results in a cable that a few hundred pounds of tensile strength.

>>8170275
How would one produce enough nanotubes for such a project? What would the cost be?

>>8170275
Do you know what a realistic construction for a macroscopic carbon-nanotube-based "rope" would be? Seems to me you need to make strands that are each a continuous nanotube miles long, which is quite a feat. Can they be shorter and braided more like a rope? I just imagine that fraying apart under the massive tension.

Not protesting, I find the idea cool, just don't know much about it.

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>>8170252
It's real

>>8170255
desu, if we can imagine that we can imagine it then that is close enough to be rigorous mathematics.

Nigga over there is fine both with creating 'imaginary' placeholders for irrational numbers, like the square root of two, and he is also fine with approximating these numbers when doing applications like plotting graphs.

If we can algebraically construct numbers whose square equals two and if we can get numbers that approximate that result then why is it nonsense for him to assign those approximated decimals to our constructed irrational numbers.

The analytical representation of irrationals is literally merging the concept of algebraic irrationals and approximated irrationals, which even in his world would make it rigorous.

I mean, if for algebra over the reals we assume that some number exists such that the square of it equals two, would it not make sense to state that any such number must look like our approximated results?

If not then what is it going to look like? 5? 5 3.994818? No, it wouldn't like that.

It would look like 1.41 though.

>>8170255
>>8170300
how the fuck can pi be a infinite number?

math nerds think ya and this is why theyre homeless XD

Yes. Most of the time, you can beat them by hosting them, which is why casinos make money.

>>8170220
It's possible to make money, if you're smart enough. However, for most, it's a pretty bad idea.

http://newsfeed.time.com/2012/08/07/how-mit-students-scammed-the-massachusetts-lottery-for-8-million/

Does this mean it's impossible to leave a galaxy without getting sucket into a black hole?

>>8170207
Give me a source m8

>>8170263
Even if OP was right about DM being entirely black holes, it can't be impossible to leave the galaxy because light from other galaxies can travel through the halo to our planet without getting sucked into any black holes.

>>8170095

>work at a manufacturing company

reality:

>work every fucking day
>stress every day
>trying to focus on making ends meet but taxes, groceries, gas, electric...
>Stress of whether I will continue to have a job and be able to feed myself
>Stress of not showing up late, being a dumb shit or being unlucky and getting fired

you're stuck bro

Make a schedule and ask for help/form a study group.

you need more drugs in this equation

look up on greek fire fagot. a simple google search would have given you the answer

>>8170015
Greek fire.
Napalm.
Any sufficiently compressed and aerated flammable liquid.

>>8170022
>real world not guesses and flame throwers

Well in liquid form the fumes are not flammable until the liquid catches fire. Has to be something with a lot of energy though and with explosive properties. I would say a type of rocket fuel is the only thing that really matches these properties.