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Archived threads in /sci/ - Science & Math - 645. page


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How the fuck does "Common Core" work? What is this fuckery?
28 posts and 2 images submitted.
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consider the following:

solve 15 - 11.

1) 11 + 1 = 12
2) 12 + 1 = 13
3) 13 + 1 = 14
4) 14 + 1 = 15, which is exactly what we wanted

adding up 4 of the 1's we get 4, hence 15 - 11 = 4.

Q(uickly).E(ject).D(ick).
>>
>>7641586
So that's what that fucking lecturer was doing. Some intro maths lecturer at my Uni was trying to show something like that and everyone was confused as fuck. Didn't help that the guy was ESL.

Seems slow and pointless.
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>>7641565
Common core is written mental math for retarded people that can't into mental math by themselves ( and generally it just ends up confusing them just as much if not more, as their retardation is genetic and not due to a flawed teaching method ).

What's the evolutionary purpose of baldness?

why did human body decide to just let the top of your hair disappear?
28 posts and 5 images submitted.
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>>7641523
There isn't, bald people just still kept getting laid (likely before they started balding)
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It shows how beta you are. Women find it disgusting and you end up killing yourself. Better hair genes gets more pussy.
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>>7641531

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why aren't you an astronaut yet

>baaah it's too hard

these are the requirements on the official website
38 posts and 1 images submitted.
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Applications doesn't mean they will send you to pluto right away. If you had even a tiny bit of surgery that can cause a health risk, or any condition that can even remotely cause you to risk the health or lives of the crew members, they will disqualify you immediately.
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>>7641502
I'm not an american
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>>7641502
I actually don't want to be an astronaut and don't even know why people would want to be one. I might fail to see the appeal. Or it's just an american meme that survived the "end" of the cold war.

Ivan Zelich, 17 years old boy, has done something groundbreaking and his discovery is going to change the world drastically. This kid is the real deal, not Jacob Meme.
What are your achievements math guys? Shitposting on /sci/?
125 posts and 14 images submitted.
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Here's the article
>daily mail
http://www.dailymail.co.uk/news/article-3304659/Schoolboy-genius-17-develops-maths-theory-calculates-problems-faster-COMPUTER-idea-did-it.html
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>What are your achievements math guys?

I made it out of the hood, nigga
>>
>Jacob meme
Lol. Butthurt you'll never have an IQ that high, OP? Its alright, maybe people smarter than you will discover a way to cope with living as a dummy :)

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The first person to accurately decode this 17 digit cipher will get a $50 Steam Gift Card.

I just want to see if you can do it.

Good Luck Anons.
19 posts and 3 images submitted.
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just type out the cipher if this isnt a ruse fambioni
we cant read your shit handwriting
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>>7641356
you mafia or something? too risky my nigga
>>
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>>7641360
Here you go anon. Some of them are decimals.

Good luck

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1/3

What Chemtrails are, and why they're real

Coming to Face the Facts

I, like any denizen of the internet, have come across the cornucopia of crazy conspiracy theories, from the plausible to the ridiculous, to the type that are so nonsensical that one can’t be sure they’re not a parody of the ridiculous. One of these, which I’d classified as the second category (clearly ridiculous, but obviously not a parody as people seriously believe it), was that of chemtrails. In short, “They” are spraying chemicals from commercial airliners (which typically cruise around 35,000 feet above sea level) for various nefarious purposes, ranging from mind control to mass-sterilization.

I chalked this up to being ridiculous because, to put it simply, it never really made sense to me. First, what chemicals would be sprayed, and how they’d be at all good at being distributed across populations when delivered over six miles above the populations they’re supposed to be affecting. Second: what these chemicals are supposed to be doing; the sterilization thing is obviously not working. And third: just how big is the conspiracy. Are all airliners in on it? The pilots? If so, how has it been kept so secret for so long?

After I got my private pilot’s licence, I began to have doubts. I learned more about planes, and realized that the conspiracy not only doesn’t have to be that big, but it actually is happening. Not only that, but I now can say with some certainty which chemicals are being used!
57 posts and 11 images submitted.
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2/3

Chemtrail Composition

Chemtrails are, as the name suggests, trails of chemicals, in this case specifically those left by high-altitude aircraft. Some chemtrails may linger for hours, while others seem to vanish within minutes. However, even those that visually disappear to not actually disappear; it’s just that the majority of chemicals released are colorless and odorless, but no less dangerous.

The primary component of chemtrails is hydric acid, which, like the other ingredients I’ll talk about, has the worrying ability to dissolve completely in water. Hydric acid is special in that it’s what is visible in the contrail, as it’s triple point—the temperature and pressure at which it can exist as a solid, liquid, and a gas—is close to normal atmospheric temperature and pressure. In its solid form, hydric acid is reflective, which is why chemtrails appear white.

Hydric acid has odd properties, and was used extensively by the Nazis, who mostly studied how long it took people to die when exposed to lethal amounts of it. It’s corrosive, to the point of being able to dissolve rocks, and is a greenhouse gas, though you won’t often hear it talked about because it’s effects are deemed minor and inconsequential.

Another major component is carbonic anhydride. Carbonic anhydride is acidic and corrosive when dissolved in water. It’s deadly to humans (when present, it prevents the lungs from absorbing oxygen), and when placed in seawater it has been shown to bleach choral and even dissolve the shells many marine creatures produce to protect themselves.

Finally, I’d not be doing my job without mentioning that carbonyl, a highly toxic chemical, is also present in chemtrails. Like the others, it’s colorless, odorless, and tasteless. Remember: just because you can’t see it, smell it, or taste it, doesn’t make it any less dangerous!
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3/3

Why Chemtrails?

Here, I can only enter the realm of speculation, based on the aforementioned three deadly ingredients of this toxic soup. Because carbonic anhydride and carbonyl are both deadly, with the former being heavier than air (and thus tends to sink to the ground), one possibility could be a mass extermination campaign. However, the primary ingredient seems to imply ulterior motives.

My theory is that chemtrails are a form of chemical geoengineering. After September 11, 2001, when all air traffic across the US was grounded, studies showed that the lack of chemtrails actually changed the weather patterns from what, until then, had been considered natural! It’s probably not a coincidence that airplanes release the cocktail when at high altitudes, where hydric acid becomes reflective (though even when not reflective, it’s still a potent greenhouse gas!).

So I hope you learned something from this whole thing. Hopefully soon the public at large will be educated enough about these things to be able to make informed decisions about the quality of our air.
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have people been dying in significant numbers of anomalous poisoning from toxic chemicals, such as those mentioned?
No?

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In terms of how the commands work and what they do
Pic unrelated
27 posts and 2 images submitted.
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Dunno, hardest I've used is R t
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Assuming complicated, but not unnecessarily complicated, I would go with assembly language. Otherwise, I would go with Arnould-C.
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what the hell does hard mean in this context? tedious? then probably x86 or one of those gimmick languages like chef

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Is getting a programmable robotic arm worth it? I figure it would be a good hobby. I have a strong background in hydraulics/electronics, so would the programming part be hard to pick up?
>also general robot thread
11 posts and 1 images submitted.
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self bump
>>
They come in kits these days, pretty easy from any angle you come at it.
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>>7641110
do you have one?

Does evolution mean me and brad pit are cousins?
12 posts and 1 images submitted.
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yeah, and that tree next to your house if you go back far enough.
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>>7641099
He look like real good looking monkey in this photo. must because of it's nasty long beard and hair.
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>>7641099
yes

so i was being a smartass the other day, and told my friend who vapes that even though its called "smoking", you never actually want to burn what you're trying to smoke, even cigarettes, marijuana, etc. he doesn't believe me at all, so i figured you guys could settle this.

my reasoning is that burning (ie combustion) will destroy nicotine/THC/cocaine/meth/opium or whatever youre trying to smoke, chemically, and that smoking a cigarette actually works by burning a small amount of material and paper in order to get the solid phase nicotine right next to it to vaporise into gaseous phase and go into your lungs. and vaporisers do the same thing, but they use electricity to heat it enough to vaporise, thus excluding smoke.

its seems like chemically sound reasoning to me, am i right or wrong?

>inb4 calling me autist/smartass/asshole for correcting someone
its just a fun fact chill
26 posts and 1 images submitted.
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>>7641098
>my reasoning is that burning (ie combustion) will destroy nicotine/THC/cocaine/meth/opium
That's wrong
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>>7641098
I had an argument over on 420chan a few years back with some idiot who thought that candle's don't burn, but rather, they vapourize

You're the first one in a few years to rival his stupidity
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>>7641106
>>7641108
where am I wrong?
I mean obviously it has to get from solid to gaseous form somehow, is this not what heating accomplishes? and obviously the chemicals are not combusted, or they would change into different chemicals.

???

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Fact or fiction?
19 posts and 4 images submitted.
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>>7641002
You can keep an object moving straight forever in a 0G vacuum due to inertia
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Impossible.
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>>7641014
That's not infinite energy though. If the system doesn't have continuous net output it's not a "perpetual motion machine."

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>TFW you know your product is p-methylbenzaldehyde but you can't justify your answer with c13 NMR analysis
14 posts and 1 images submitted.
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>>7640943
Then you don't know your product is p-methylsmhtbhfam
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>>7640949
>Can't read 100-level chemistry
>>>/c/
>>7640943
post that spectrum
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>>7640943

>>7640949 This tbhqhwy (to be quite honest with you)

Why don't you do a 2D NMR?

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I'm going to kill myself if the EM drive isn't real.
36 posts and 3 images submitted.
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>>7640898
I don't see why they can't whip one up and strap it to a satellite or some kind of fairly simple probe and give it a test run

Like keep testing it sure, but multiple of these things have been made (since multiple places are testing them) so surely it would be worthwhile to actually field-test one and see if it holds up outside of a laboratory setting.
>>
>being this much of a space exploration fanboy manchild

space is BORING AS FUCK stop pretending that getting off of this planet would magically solve all of your problems
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>>7641197
wow pleb

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What does /sci/ think of timed tests? I think they are bullshit.

My chemistry professor gives us a timeframe on our exams so we have about one minute per problem. Now, I understand everything conceptually, but math is not my strong point, so I need time to set up full dimensional analysis or work through calculations in a formula a step at a time, and doing this I get most of the practice and homework problems right, but I only get low B's and C's on exams cause with the time limit not only is feeling rushed working against me, but he expects us to know immediately what to do, including shortcuts.

Are timed tests just a way to create a more pronounced bell curve (separate the xceptional from even those who just good?) Any tips for dealing with exams like this? Are profs like this just shit?
26 posts and 1 images submitted.
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there is a difference between solving the problem in 1 minutes and 10 minutes. you challenge yourself to work faster. whats wrong with that ?
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I agree with you, but what are you going to do, fail? Man up and get gud. Become exceptional.
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>>7640804
Their is no math in chemistry that should take longer than a minute. You don't know the concepts

How bad is glyphosate?
31 posts and 6 images submitted.
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>>7640669
About as bad as people's comprehension of basic ecology, evolution, and glyphosate's degradation rate. Have fun dumping on more and more to combat an increasingly resistant population. Have fun with that soil accumulation.

Round-up ready is garbage, laughable, infantile engineering. Genetic engineering has potential as of yet far untapped. This fucking irresponsible joke is not something to applaud, it's a disgrace. It's banal. It's shameful.. Unfortunately, real innovations like won't often come from the private sector. I don't fully know where or how, but as it is now, it's all completely pathetic.
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>>7640684
Oh look, it's the anti-science naturalnews faggot...
>>
>>7640692
Oh look, it's that person that doesn't realize they're religious.

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