Archived threads in /sci/ - Science & Math - 298. page
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Let [math]a = 0.999999...[/math]
[eqn]
\begin{aligned}
10a &= 9.999999... \\
10a - a &= 9.999999... - 0.999999... \\
9a &= 9 \\
a &= 1
\end{aligned}
[/eqn]
[eqn]
\begin{aligned}
\frac{1}{3} &= 0.333... \\
\frac{2}{3} &= 0.666... \\
\frac{3}{3} &= 1 \\
\frac{1}{3} \cdot 3 &= 1 \; \therefore \; 0.333...(3) = 0.999... = 1
\end{aligned}
[/eqn]
[eqn]
\begin{aligned}
0.999... &= \left( \frac{9}{10} \right) \left( \frac{1}{1 - \frac{1}{10} } \right) \\
&= \left( \frac{9}{10} \right)...
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>>7948603
This is all true, but also unlikely to convince anyone who doesn't already understand the reasons of why 0.999... = 1. For the bottom one in particular, I'd like to see an intermediate step through the series interpretation.
Quit posting this slut
>>7948629
Shit taste goes to >>>/lgbt/, Anon-kun~!
So what's the deal with Lung Cancer? It's the most common type of cancer worldwide and yet people insist its primarily caused by smoking. With so many people these days not taking up cigarettes and the lung cancer rate still high, why is it still so common? Was there another primary cause all along?
>>7948344
probably because of all the shitty air in this wrld.
>>7948344
Has to be troll thread.
The specific type seen in smokers occurs over 99% of the time in smokers. You know there is more than one type of lung cancer, right?
Vehicle exhaust is known to be carcinogenic, as is most other smoke like fireplace and industrial. Smog over your city? Enjoy your cancer.
From an evolutionary point of view, why do I want to hug this bear because I find it so cute and cuddly, even though it'll more than likely maul me to death?
>>7948201
Because you associate large facial features and soft textures with human babies, which is it evolutionary advantageous to care for.
Or something.
>>7948249
Why do people still believe ADHD is largely real?
>One in five American boys receives a diagnosis [for ADHD] by age 17.
>The authors suggest that when schools are under pressure to produce high test scores, they become motivated, consciously or unconsciously, to encourage ADHD diagnoses—either because the drugs allow low-performing children to score better or because ADHD diagnoses can be used to exclude children from testing. They didn't see comparable increases in places where the law kept school personnel from recommending ADHD medication to parents.
>“In 2001, No Child Left Behind put the whole country on notice that districts are accountable for scores,” Dr. Hinshaw notes. “But if you go back two decades earlier, in the early 1980s, some states got on the consequential assessment bandwagon earlier or the high school exam bandwagon earlier.”
>What the team found is that in states that enacted these measures early, within a couple of years rates of ADHD diagnoses started going up, especially for kids near the poverty line.
>This isn’t surprising as the diagnosis helps the school comply in several different ways, Dr. Hinshaw notes. If kids who are struggling with ADHD get treated, it should improve their functioning in school and hence their test scores. But it’s also the case he adds, that in many jurisdictions, if you get an ADHD diagnosis your test scores don’t count.
etc. etc.
>>7948196
It's easier to just drug someone up.
I had a roommate that had terrible anxiety/attention/stress shit. She just didn't know how to deal with problems. She was awful at taking advice/criticism no matter how constructive it was.
At some point, I just started making sure she took her pills. It was honestly just easier than trying to address the actual problem.
Society is moving in a direction that requires more and more people to be heavily trained in rigorous, boring tasks. Naturally we don't have enough people to fill these roles, so we're creating more with drugs.
This is the human race taking control of its own evolution. Either get on board or step out of the way.
>>7948196
statistical support for heritability of ADHD from gene variants between children and general population:
http://www.nature.com/tp/journal/v5/n2/abs/tp20155a.html
So abiut a year ago during an energy for the real world class we researched fusion. During one it talked about a facility that contained a massive fission or fusion explosion. (Forgot which) I unfortunately forgot the name of it and can't seem to find any mention of it. Any ideas?
>>7947924
https://en.wikipedia.org/wiki/Z_Pulsed_Power_Facility
>The Z Pulsed Power Facility, informally known as the Z machine, is the largest high frequency electromagnetic wave generator in the world and is designed to test materials in conditions of extreme temperature and pressure. Since its refurbishment in October 1996[1] it has been used primarily as an inertial confinement fusion (ICF) research facility. Operated by Sandia National Laboratories, it gathers data to aid in computer modeling of...
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>>7947924
>a facility that contained a massive fission or fusion explosion
This is seriously the best description you can come up with?
>>7947939
Thank god. Your help is very much appreciated.
I'm was trying to solve for the electrostatic force given that the object was stationary and that m= 5 grams.
I realize now that mgtanθ=FE, but according to this quick picture I made, Fgy=FT, so (mgcosθ)(sinθ)=FE, but that's not right.
I was wondering if I did something wrong, or if doing it that way just doesn't work.
homework goes to >>>/hm/
mg/tanθ
>>7947938
I think this is not right.
Can we get a cringe/YLYL /sci/ thread going?
Post cringe worthy popsci quotes, new age bullshit, etc.
One of my all time favorites
https://www.youtube.com/watch?v=zVSe8JZ_eag
Cross-posting from /diy:
My mom works in a pediatric doctor's office and the doctor knows that I tinker a little bit. He gave me this old centrifuge that has just been collecting dust for years, along with the tubes that go inside.
What are some neat things that I can make or synthesize using a centrifuge?
(I know that's not what it's for, but I'm curious, dammit.)
centrifuges are important for pretty much all basic molecular bio protocols, although these days people usually use rotors that fit smaller tubes and have variable speeds rather than a single on/off switch.
You can synthesize a colloidal suspension of tiny dicks. All you need is maltodextrin and yogurt
>>7947218
Separate semen into fractions
![1458577062642[1].png](https://i.imgur.com/W3PZE4p.png "1458577062642[1].png")
Are humans really gonna fug this?
Hanson Robotics "Sophia" Female Companion robot
![Sexy-Japan-Anime-FREEing-STARLESS-Marie-Mamiya-1-6-Figure-Figurine-30cm-no-box[1].jpg](https://i.imgur.com/G2HzCez.jpg "Sexy-Japan-Anime-FREEing-STARLESS-Marie-Mamiya-1-6-Figure-Figurine-30cm-no-box[1].jpg")
> not making the robo-dolls look like popular animu characters
huge marketing misake t̨bh f̨am
lmao at 'reaction face'
If they are horny enough.....
So what is everybody's opinion on the Riemann Hypothesis?
take your pedophile cartoons back to >>>/a/
>>7946437
I did my masters thesis on the Riemann Hypothesis. Half of my name is on one of equation proves in the derivative outcomes of it. Other guy is named Connes.
desu Connes did most of the work.
Ask me anything.
I've already proven it but the proof is too short to fit in this post
>analysis of genetic information indicated
>at least four interbreeding episodes,
>three with the Neanderthals,
>and one with the Denisovans
Reuters on Friday
http://www.reuters.com/article/us-science-interbreeding-idUSKCN0WK2SN
← reconstruction at museum
>>7946274
I would ravage that Flintstone pussy.
Is human/ neanderthal breeding beastiality?
Neanderthal features?
Are limits rigourous? They seem to just be "oh, just eyeball where that function seems to be going"
Are you still in Calc 1?
>>7946273
>he has never done an epsilon delta proof
RUDIN
>>7946273
Yes, the limit is well defined. The limit is defined as follows:
if
[math]
\forall \epsilon > 0 \exists \delta \text( s. t. ) x \in x_0 \pm \delta \implies | f(x) - L | < \epsilon
[/math]
which means the limit as x approaches x0 = L
>Ceres DAWN has been in LAMO for months
>here have this nice closeup of some random crater
Um, I'd like to see some high detail of the Occator bright spots.
>haha we already told you they're salt (probably) didn't you see that heavily manipulated image we put out in August :^)
Why can't we see a raw image like all the rest of the features.
>because it's salt we told you what are you a tinfoil :^)
Why can't...
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>>7946134
Tell me, do you honestly believe it is ayy lmaos? Not trying to discredit your post, just curious.
>>7946137
Denying the strong possibility (pretty much certainty) of alien life is super retarded.
Its like going to the ocean and scooping up a cup of sea water and saying "obviously no whales live in the ocean, heres the proof"
>>7946146
Not that dude but obviously he's asking if you think proof of aliens is in that image, not if they exist entirely.
You're going "this whale could be in this cup of water"
I'm doing an undergrad research gig at a government lab this summer. Will I be drug tested?
Since it's a temporary thing I doubt they would bother.
>>7946131
If it's a government lab I would not be surprised at all. You should be ready. Of course, I'd say this is far more likely if it's somehow related to national security than for much else.
>>7946141
It's CS related, but not security or anything.
Should I also plan for tests throughout the summer or just one when we begin?
What is the most efficient way to get your brain out of that funk of "I've been doing too much work, I need to relax before I do more work" phase? Because I really just want to keep working, and even though the idea of continuing exhausts me, there's absolutely nothing else I actually WANT TO DO. Just NOT WORK. What's the cure, /sci/?
>inb4 get off 4chan.
This is the first time I've been here all week, and it was just to ask this question.
is it weird or just the result of the circumstances that the most "successful" people are the ones everybody wants to fuck? is it just the true manifestation of the human nature? is this all we are, monkeys? can we become more than human? if anyone knows please tell me
>>7946032
Relaxing might do it.
>>7946044
>Relaxing might do it.
Well, yeah, but what's the most efficient way to relax, that allows me to get in and out as fast as possible and ready and rearing to do more work?
