Archived threads in /sci/ - Science & Math - 401. page
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← hottest year since 1880
cue the denial in 3 ... 2 ... 1 ...
https://www.climate.gov/news-features/featured-images/no-surprise-2015-sets-new-global-temperature-record
There is still lots of empty space in Canada and Russia if it's too warm for you but most people like it warm.
yeah
but really climate change controversy stems from a dispute regarding human involvement
Can global warming cause temperature decrease in some regions? -18 c in korea.
>>7806358
Yes
global warming isn't real
>-18 c
That isn't even cold. You don't even need mittens at that temperature.
Can Freudian psychology be summarized by the following
>Guys want to go back into their mothers womb
>Girls want to please their fathers
Guys also want to kill their fathers because the dad gets to plow the mom but the son doesn't.
Its the same reason why Dads hate their daughters boyfriend.
>>7806354
>Freudian psychology
Not science
>>7806380
It's kinda science, because it's recording patterns in data. In this case, human behavior. Neuroscience is the only real science, but psychology, even Freudian psychology is helpful in understanding human behavior, even if it's not entirely rigorous.
It's a useful short-cut, like the dumb memetic devices you used to remember shit in school, or 'carrying' numbers in addition. It works, so we use it.
If I get the international paperback of pic related, will I have the same exercises as the regular version?
>>7806317
bookzz.org has it
http://bookzz.org/dl/1174358/22dae9
>>7806321
Thanks Anon. Didn't know about that site.
>>7806317
I'm reading this book right now and I see htis. Yeah it's the same shit.
>top list of greatest inventions/innovations of mankind
>electricity is not number one
>electricity is not on the list
>>7806224
>top list of greatest inventions/innovations of mankind
>memes are number one
>memes are so great they decided to just make them the only thing on the list
Not Surprised.
>top list of biggest faggots of mankkind
>op is not number one
>op is not on the list
>>7806224
Prepare to be assblasted by all of the white inventions on that list if you are a nigger.
I'm really slow to learn college math concepts in calculus and linear algebra, and also struggling with computer programming.
Seems like a low IQ.
Are there ways to become less retarded?
Practice.
>>7806220
daily shitposting def. raises IQ, you're on the right track!
>>7806226
Yeah, I don't know man. It takes me like half a day to get through a chapter with a few examples, and by the time the first tests start I'm considerably behind.
Should I take up a job sweeping chimneys instead?
Any geophysics people here? What kind of jobs do geophysicists get?
>>7806181
Right now they get to sit around masturbating to anime all day while they wait for oil to be worth a damn again.
Who knows in this downturn
>>7806149
The same reason hitting a magnet with a hammer demagnetize it.
Taking a guess based on background knowledge: assuming it is something like an iron nail, the material is already prone to "picking up" magnetism. By aligning it with the Earth's field, you are providing a weak magnetic order. By striking the bar, phonons propagate and allow a source for spin-flip interactions that allow the bar to pick up a weak ferromagnetic order, making itself magnetic.
>>7806149
I know they used to make these lock assemblies with magnetic pins, in the 80's so it would stick to any ferric picking tools and complicate any attempt to pick them open or bypass them.
So, we'd just hit the mainbody with a hammer, and via magic physics properties, it'd kill the magnetic field or someshit and I'd just pick that shit open with our regular ass steel tools.
I still don't know why it worked, but it did. It further strengthened my belief that a regular-ass hammer...
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Why is the universe so fine tuned for life? and given that fact why is it that only earth has life?
>>7806029
One theory is that there are multiple universes and you are only conscious and aware and 'alive' is because you are in the one universe where it's possible to be alive.
So in most other universes, we all got killed a million times over during the cold war. So reality seems more bizzare as it goes along 'I can't believe we actually survived all that historical shit!' it's because if we had not, you would not be conscious to observe it, so since you can only observe a reality...
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Dam
Praise
There's no reason
Earth almost certainly isn't the only place containing life
If people in the past used to think the sun revolved around the earth, then what exactly was a year to them? Or did they know the earth spins on its own axis and adjusted the model movement of the sun to fit a year?
>>7805893
A year is 12 months. A month is the time it takes the moon to orbit the earth.
this >>7805926
they did that because it lined up so the seasons would come at roughly the same time every year
100 years ago there wasn't such a thing as weekends.
Why do people trust these guys when it comes to science?
>>7805581
What are they wrong about?
>>7805585
not him, but the way they go about classifying chemicals as hazardous is really, really, really bad.
>>7805585
LOL
how do I get a better intuition for absolute value? authors always seem to randomly add and remove them for reasons I don't understand.
What's your best guess?
>>7805574
Distances. It's literally non-negative distances.
You might fly from New York to Chicago in a straight line (1500 miles, say), and then back to Chicago from New York (1500 miles), but you wouldn't characterize either trip as "-1500 miles". Not under normal circumstances, anyway.
Any time you have some model, or case x of something (or change x to something) which is manifestly non-negative, it's time to start thinking about abs(x). It might not be necessary in the end, but...
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>>7805574
Someone please tell me if I'm wrong.
In the last equation, there is an equality and one side is being multiplied by x squared.
x squared will always be positive, and the absolute value of cx will also always be positive. If one side is always positive, then the other will also be always positive. So you can just remove the absolute value because it changes nothing.
Is my reasoning correct? I have not yet seen these kind of problems on my own. Just a freshman baby.
would multiple genetically cloned humans really have varying personalities if they were all cloned from the same person as they do in Star Wars?
>>7805406
Yes, environment and experiences form personalities moreso than genetics.
>>7805406
you cannot 100% control environmental influences which heaily influence personality. even if you tried your best to build 2 perfectly identical chambers and locked in 2 clones for a certain amount of time, they might still develop different personalities because the ceiling light in room 1 has a 1nm shift in wavelength compared to room 2 or the air has 0,1% more oxygen in room 2.
>>7805406
Identical twins.
Why can't the Kernel in the Volterra integral equation ever be separable? My textbook says it's obvious due to K(x,s)=0 at s>x, but I don't see how that helps to prove it.
u(x) = f(x) + \int_a^x K(x,s)x(s)ds
[math]u(x) = f(x) + \int_a^x K(x,s)x(s)ds[/math]
I tried to somehow use the fact that it can be rewritten as the Fredholm integral equation in a triangle area:
[math]\hat{K}(x,s)=\begin{cases}
K(x,s) & a\leq s\leq x\\
0 & x\leq s\leq b
\end{cases}[/math]
but so far no luck.
>>7805285
Assume separability. For the zeroing condition to hold, the s-dependent functions in the expansion of the kernel need to also depend on x (or how else do you make them zero?). This clearly contradicts separability.
Can /sci/ recommend me a good, digestible textbook on Fourier Analysis? I know how it works but I want something that can give me stronger intuition.
In exchange I'll give a recommendation: I've reference-read about 30 different Abstract Algebra books and Pinter's "A Book of Abstract Algebra" is my favorite general purpose one. I don't think it's often assigned but it's great for building intuition.
What do you think of Springers Algebra Chapter 0? And if you know any good books for Functional Analysis I'd appreciate a rec.
>>7805115
Not OP, but
>What do you think of Springers Algebra Chapter 0?
I like it for the way it introduces categories and how they're intertwined with algebra.
>And if you know any good books for Functional Analysis I'd appreciate a rec.
I heard Kirillov, Gvishiani: 'Theorems and Problems in Functional Analysis' is p good.
