Is there any easy way to learn calculus?
"easy" is relative. For example, it is easy for this goat to climb this cliff, but it would be hard for you.
>>7683762
hang yourself please
Owl -> Hearing
"With ears set at different places on its skull, an owl is able to determine the direction from which the sound is coming by the minute difference in time that it takes for the sound waves to penetrate the left and right ears."
Is this true?
>>7683752
It's how your directional hearing works too. It's also why you can't tell what direction sound is coming from underwater; the higher speed of sound makes the time difference too small for your brain to find the direction of the source.
>>7683758
nice comment, tnx
>>7683758
I thought it's because you hear something louder in one ear than the other? Fuck you bro
I need some practical reference materials for electro magnets, induction, coiling and anything you think could be helpful.
>>7683715
Any book on electronics. Any book on electrodynamics. Any google search.
>>7683866
If it's not a link or series of useful words you can fuck off into the direction ya came from.
>>7683715
http://4chan-science.wikia.com/wiki/Electrical_and_Electronics_Engineering
Hi /sci/ I want to learn about proofs. I'm slowly improving with exercises in which I have to prove something, but sometimes I struggle even with fairly simple ones. Which is why I'd like to learn proofs the proper way.
The problem is that I'd like to do it as fast as possible. In another thread 'How to Prove It: A Structured Approach' ( http://users.metu.edu.tr/serge/courses/111-2011/textbook-math111.pdf ) has been recommened. Is it the best option? Can I make it quick?
Also what do you think about:
- Proofs from the Book http://www.emis.de/classics/Erdos/textpdf/aigzieg/aigzieg.pdf
- A=B https://www.math.upenn.edu/~wilf/AeqB.pdf
I guess that they're not learning material, but how high would you rate those two? Will they be worth the time spent to read?
/sci/ has got no clue about proofs.
How do I prove that?
>>7683708
Interesting book. I have a question but I won't make a new thread about it because it is probably irrelevant.
As someone who is doing proofs in school in things like linear algebra, I decided to check the book out and see if I'm not retarded. I skipped the walls of text and went immediately to the examples.
See this:
>Example 3.1.3. Suppose a, b, and c are real numbers and a > b. Prove that if
ac ≤ bc then c ≤ 0.
So I figured a proof in my mind that went like this
We know that a > b but when multiplying the inequality by c we see that the inequality changes from a ">" to a "<" and this only happens when you multiply an inequality by a negative number so for ac < bc to be true c < 0 must also be true. Then for the <= case if c = 0 then ac = bc for any real numbers a,b. So ac <= bc if and only if c <= 0.
I feel pretty satisfied with my proof so I read the solution given for the example
>Assume the contrapositive, c > 0. then if you multiply a > b by c you get ac > bc so the contraty can only be true if and only if c <= 0.
It looks good but could any anon tell me if my proof is also correct? Is it sort-of correct but lacks rigor? Am I retarded? Should I drop out of pure maths already and study sociology?
>>7683708
There is no fast way, and if you do it fast you'll leave gaps along the way.
The four years of mathematical training are pretty much devoted to teach students how to write proofs. It's hard for everyone, there is no easy road
Keep solving problems. That's all there is to it.
Can we agree that gravity is FTL?
>This guy walks into the club and optimistically slaps your (Newton's) autistic ass.
What do?
>>7683707
I contact my friends in the government and tell them to suppress your version of Calculus.
>>7683702
lol no
Doing maths while masturbating.
I call it mathsturbating. Anyone else do this?
>>7683675
>Anyone else do this?
I masturbated while reading a topology book once. Didn't remember much.
No. Math doesn't give me any sexual feelings. It's like driving a car feeling actually.
>>7683675
fuckin yes.....The only way I motivated myself to do my long ass homework at the time. It was weirdly satisfying.
ITT: We post what annoys us during math lectures. I'll give it a top-notch start:
> professor struggling at the blackboard, because he thinks he can waltz through proofs
>I'll leave this as an exercise
>>7683658
>annoying nerd smugly raising his voice to correct an error the professor made
Not maths, but my Edynamics profs puts a vector arrow above the volume infinitesimal
Is it possible with today's technology to convert light into sound ?
Yes. You use a spectrometer to identify the spectrum of light and then associate a sound frequency with each peak in the spectrum.
>>7683642
Depends on your definition of convert
If somewhere along the line on your internet connection, there's a fiber optic cable, then any sound you download off the internet is converting light to sound, with a few steps in between.
What are some good YouTube channels for science and math /sci/? Especially for math.
pewdiepie
>>7683620
lsd
>>7683620
ViHart, Numberphile, Veretasium, Periodic videos, thunderf00t & sixtysymbols
If you can't solve all of these you have no right to discuss physics on /sci/.
>>7683513
>Baby's first zadachnik
>>7683514
Can't find a decent translation and I don't fancy learning Russian
Is this pop sci or not pop sci?
What are the applications of QM really?
>>7683440
>Applications
Pleb.
Science is about understanding the universe not making gadgets.
- Molecule models, explaining different "states", which let us compute reaction rates.
- Solid models of crystals/metals, letting us compute specific heat capacities, conductivity etc.
- Atom-photon models, theories of the [L]ight [A]mplification by [S]timulated [E]mission of [R]adiation
etc.
> what are transistors?
What does /sci/ think about global warming?
Don't say shit unless you have data links. I'm trying to throw together an opinion for tonight. I'm having thanksgiving with a table of ultra conservatives.
>>7683380
Memes.
>>7683380
What's the point of making this thread? What does it matter what a few anonymous posters think.
>>7683386
I'm really just looking for good sources hoping you could help, I'm pretty new to the topic.
How large would a sphere of the densest known element, Osmium need to be to have 1G at its surface?
Not your personal homework solver.
what is 1G?
>>7683381
1000$
my astronomy professor assigned us this essay over thanksgiving break and I'm completely drawn a blank. Can any of you help strike up some ideas for me to talk about comets or asteroids because I have no idea how I'm going to write 3 pages about them.
>>7683333
And sorry for sideways picture, I'm posting from my phone. Also, check em.
>>7683333
>dr.j =:>
Is he a troll?
>>7683338
No just a really senile old man. He looks like Santa
Would you do the penis vagina thing with a girl even if she hasn't read Rudin?
>>7683233
because the two are unrelated you autist
>>7683233
Yes. Analysis is boring as hell.
>>7683233
> Would you do the penis vagina thing with a girl even if she hasn't read Rudin?
No because that would mean she's a baby.
