[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]
Archived threads in /sci/ - Science & Math - 62. page
Images are sometimes not shown due to bandwidth/network issues. Refreshing the page usually helps.

File: logicbox.jpg (45 KB, 500x303) Image search: [iqdb] [SauceNao] [Google]
45 KB,
So I'm sure this has a really simple explanation that I'm just not getting, but I'm wondering if you guys can help me.

In my textbook example of graphical symmetry, we're expected to calculate algebraic symmetry. The example we're given is x - y^2 = 1.

It claims that, of the y-axis, x-axis, and origin, it is only equivalent with the x-axis. The reason it gives is that...

>" x - (-y^2) = 1 is equivalent with
> x - y^2 = 1 "

How does that make sense? I...
>>
>>7801056

A reflection about the x-axis will take x to itself (it's the hinge) and y to -y (bottom goes up, top goes down).

>(x - y^2 =1) =/= (x - (-y^2) = 1)

They fucked up the parenthesis

x - (-y)^2 = x - y^2
>>
>>7801078

Oh I see what I did.
It's the exponent. A negative times itself is a positive to the -Y becomes a positive Y anyway.

So it is equivalent. My bad. Thanks for this.

File: 1452570700037.png (25 KB, 265x297) Image search: [iqdb] [SauceNao] [Google]
25 KB,
Yo, /sci/.

Does masturbation lower intelligence temporarily (4 to 5 days)? I know masturbation takes the edge off and releasesays endorphins that stimulate pleasure and relieve stress, but can that cause your IP to nosedive?

I ask because I masturbation once a week (sometimes once every 5 or 6 days), and when I do, I feel like something is slipping away.

If you guys know that feeling that you have when you can tell your subconscious is working away at who know what, that is what I am talking about. And when I masturbate, that feeling goes away, and I feel...
>>
Holy fuck, autocorrect really fucked me on this one.
>>
>>7801034
at least someone fucks you.
>>
Yes, ejaculating affects cognitive abilities temporarily.

File: pepe (211).png (344 KB, 467x453) Image search: [iqdb] [SauceNao] [Google]
344 KB,
>there is easily 10,000 times more archived information than you can ever know
REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
NUKE LIBRARY OF CONGRESS WHEN?
>>
>>7801018
As long as they aren't hiding any significant mathematical proof then I don't care.

File: 1315366054650.jpg (49 KB, 600x480) Image search: [iqdb] [SauceNao] [Google]
49 KB,
I don't know who to turn to/ask. A loved one is a borderline type II diabetic (diet controlled). I've been away from this person for a few years and recently moved back. In these two months, there's been two instances that lasted for around 72 hours each time.
During this time this person was very agitated, unable to be still for any significant amount of time, was sweating even though the temperature was pretty low, fine motor control was shot, was strangely increasedly accommodating (would frequently ask if I needed anything/wanted anything/temperature was...
>>
She's cheating on you.
>>
>>7800974
what medication (if any) does she take? also >>7801706 this

File: p0257vk5.jpg (18 KB, 624x351) Image search: [iqdb] [SauceNao] [Google]
18 KB,
So.../sci/ I'm 35...didn't pay attention in highschool.
My father passed away last week after taking care of him for 14 months (cancer) but I've finally found what I enjoy in life and want to do.
I fucking love science. I love every branch, I love the curiosity.
Downside?
I'm 35, no degree, no classes, just what I teach myself currently through discussions and lectures online.

How does someone my age go about building the ground work to get a career with NASA?
Yes, it's a long shot.
Yes, I don't have the greatest math skills.
I'm...
>>
forget about it you are too old.
>>
>>7800953
This has been posted now 3 tonnes over the past 6 months... I'm on to you
>>
You sound like a retard. I wouldn't get my hopes up if I was you.

File: 1453349476259.jpg (170 KB, 1275x1119) Image search: [iqdb] [SauceNao] [Google]
170 KB,
>atheism is legal
>thousands of homeless people that atheists don't care about, because "muh hairless ape"
>instead of give food, shelter and money to them for free, and trying to rehabilitate them, they want to exchange food, shelter and some money for their contracted service for experimentation
>atheist fags out there actually get mad when people...
>>
Figure 1A: An example of a troll thread
>>
>>7800933
here's your (You), now go away
>>
>>7800933
That's the Jews you're thinking of, anon

File: reddeercavepeople.jpg (38 KB, 640x381) Image search: [iqdb] [SauceNao] [Google]
38 KB,
Did Asians get their strange looks from interbreeding with the Red Deer people?
>>
>>7800895
>their strange looks
>>
>>7801494
Because all those asians getting plastic surgery to add a crease to the eyelid, all those anime characters from notoriously xenophobic japan with incredibly western features, and wave after wave of cultural fashion fads empasizing caucasion features like blonde hair, colored contact lenses, and altered skin tones really go to show just how hideous the average asian finds white people to be.
>>
>>7801588
>all those

File: LinAlgDEs1.jpg (146 KB, 1015x817) Image search: [iqdb] [SauceNao] [Google]
146 KB,
Please Obi-sci-kenobi. You're my only hope.

I know this is "homework help question", but I really want to learn the method on how to solve matrices.

This is just one of my problems, but I can't seem to solve it with elementary row operations. An online calculator can solve it, but I can't figure it out. Is the system inconsistent?

The last column is obviously the right side of the equation. Everything to the left are obviously the coefficients.

2 1 3 2 0 1
0 0 1 1 2 1
0 0 0 0 3 0

I managed to simplify it to...
>>
>>7800858
a solution:
$\begin{bmatrix} 0 \\ 0 \\ 0 \\ 1 \\ 0 \end{bmatrix}$
>>
>>7800858
>2 1 1 0 0 0
>0 0 1 1 0 1
>0 0 0 0 1 0

2 1 1 0 0 -1
0 0 1 1 0 1
0 0 0 0 1 0
>>
>>7800858
>2 1 1 0 0 0
>0 0 1 1 0 1
>0 0 0 0 1 0
row-1 looks incorrect, should be
2 1 2 1 0 0

So /sci/, when will you accept that Biology is not and never will be a real science?
>>
>>7800823
What will you do when through biology we prove quantum entanglement, God, evolution, and the 12th dimension?
>>
>>7800823
When you prove that Medicine is not a real field.
>>
>>7800823

when you stop taking it up the ass

File: physics.jpg (224 KB, 1600x726) Image search: [iqdb] [SauceNao] [Google]
224 KB,
Are there guys with a masters degree in physics here? What is your job now and where are you hoping to work in the future?
What are some interesting branches you can work in later except doing research at an uni?

>>
>>7800820
>degree in physics

kek

get a real degree
>>
>>7800830
>>7800830
>>7800830
>>7800830
>>7800830
>>
>>7800820
bump

File: cMFsvT9.png (551 KB, 960x544) Image search: [iqdb] [SauceNao] [Google]
551 KB,
Hey /sci/,
I need some help.
When I was in 8th grade, my father died, and in order for my family (my mother&my little sister) to at least have something to eat I had to start doing different jobs.

This resulted in me falling behind on my school subjects, especially maths.

You see, my math teacher is a really nice guy, he would always write me good grades, because he knew the situation I was in and wanted to help in any way possible.
This, however, backfired greatly.
My mom recently got a job which allows me to finally focus on my studies, but I...
>>
>>7800787
By the way, I won't have access to a computer till tomorrow night, so I'll check up on thread then.

Thanks to anyone who even takes their time to read this.
>>
>>7800787
First off, maybe you can't do it. That's okay. A lot of Unis have entry examinations that will assess your math level. Since that is the case, there's no shame in taking a year off, studying on your own/at a JC and then applying to the Uni you want to go to.
Second, Khan Academy will be just about the most efficient way to do this- reading textbooks will almost certainly take more time to do than KA.
Thirdly,
a quadratic equation is one of the form
$f(x) = Ax^2 + Bx + C$
with...

File: 1449820417301.jpg (37 KB, 403x480) Image search: [iqdb] [SauceNao] [Google]
37 KB,
Sup /sci/.
I'm a mathematician with an interest in psychometry. Currently thinking about creating my own IQ test, and I came to ask myself a few questions.

The overall IQ score should be a weighted average of verbal intelligence, pattern recognition, short term memory and spatial intelligence. But how should I weight these different areas.

Consider the extreme cases of an autist who can only into pattern recognition while having absolutely no verbal skills. Now consider the opposite, i.e. a rapper with extremely good verbal intelligence but who failed...
>>
>>7800772
I remember... once upon a time... that intelligence was all about your brain. How good you were a math, physics, puzzles, etc.

Then people who were good at sports would called athletic. People who would have good verbal skills would be called articulate. A person with good social skills would be called outgoing. A person with artistic talent would be called talented.

Now to hell with you. People good at sports have 'spatial intelligence'. Good verbal skills have 'verbal intelligence'....
>>
An IQ test cannot accurately predict the IQ of anymore more intelligent than its creators, so unfortunately your IQ test can only be used to tell if someone is mentally retarded or not.
>>
Why just short term memory? Is being able to remember events and information accurately from long ago not a measure of intelligence?

File: 2r4snxf.png (121 KB, 291x402) Image search: [iqdb] [SauceNao] [Google]
121 KB,
The year is 2084. Most countries still exist in their current form, with a broad reshuffling in the Middle East, Africa, and parts of South America. There are many more countries that have active and well-funded space programs, each concentrating on a specific aspect of space exploration and technology.

As an program architect in the United Nations Office for Outer Space, you are part of the team that is constructing the world's first global space program. This agency will draw upon the strengths of each country to assemble a system that will unite all of Earth's...
>>
>>7800767
I refuse to be a globalist Jew. The impotent farce that is the UN will be dissolved soon anyway.
>>
America builds the rockets and most of the mission architecture. Europe will be in charge of research and planning.
>>
>>7800767
>human race depends on the assignments
Really? In that case you certainly do not want "assistance" from a huge number of nations. Middle East will be reshuffled, yes, by nuclear carpet bombing. Terrorists will be everywhere. You have to be more selective about who you want to bring in to the space arc you are constructing.

File: r-project-logo[1].jpg (23 KB, 300x300) Image search: [iqdb] [SauceNao] [Google]
23 KB,
I need a basic answer for a question about R, I'm just starting out

lets say I have a vector of integers called x. Normally, if i try to return certain elements, I can specify x[some range of elements]. What is going on if I try to return x[NA]?

Is this question better suited for /g/?
>>
>>7800716
Are you trying to find NaNs in a vector?
>>
It returns NA over and over again, depending on the number of elements in a vector. I know you can use is.na to NA's. I'm just trying to understand the output of x[NA]
>>
>>7800732
>>7800754

File: cool-black-cat-evil.jpg (67 KB, 520x734) Image search: [iqdb] [SauceNao] [Google]
67 KB,
>>
>>7800707
Fuckoff troll
>>
File: 1443288386719.jpg (187 KB, 575x2496) Image search: [iqdb] [SauceNao] [Google]
187 KB, 575x2496
>>7800707
>>
>>7800713
Cancer

[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]
[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]