Hey Sci
I was wondering when there are rotor blades (computer fan, helicopters etc) where is sound generation most intense and how does it spread. Where is it the loudest? Is there a good ressource with live animation gifs somewhere where you can login with ivy league login to use the software?
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>>8562799
Bumping the bump, so that it isn't just OP.
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http://physics.stackexchange.com/questions/69915/what-part-of-the-fan-blade-actually-does-the-noise-generation
Literally the first link when googled "how does a fan make sound?"
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>>8562914
Thanks!
>>8562921
Thank you for the link, very good and detailed answer, just what I looked for
The ultimate thing would be a program where I could type in all the data and get results on frequencies and power (dB) if anyone knows anything let me know!
Also: I read that in active noise cancellation the undesired noise is not eliminated, it's just quiet in a small area but even stronger in other areas (shiftibg, not eluminating) can anyone confirm this and or give me source
Thanks
Are there any neurologists in /sci/? Could we discuss the subject? I must admit I am a neophyte, but I have interest in reading about the subject. If there are any neurologists here, please provide some tips on how to improve our cognitive skills faster.
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>>8562338
>please provide some tips on how to improve our cognitive skills faster.
it's a simple but exhausting procedure called training
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Neurologist here, what you are looking for is called 'drugs'. I recommend amphetamines
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Does anyone else get that rush when they explain something to somebody else and they suddenly understand it? And then they are super appreciative of you and come to you for help all the time. It feels fucking awesome.
I can't tell if I'm actually being altruistic or if I have some sort of ego problem.
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No, you would have an ego problem if you jealously guarded what you know and dangled it in front of people to make yourself feel superior.
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no it sucks, the kids in all my classes ask me to explain the lesson 3 times over and take my answers in the process. You'd have to be ridiculously self centered to like that
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>>8562163
I do this all the time
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I'm dedicated to become a rock-star of physics & mathematics. I finished my Masters and so am already very advanced in the subject - but I want men to look up to me and women to flock to me because of my fame and mystique.
Consider this a scientific task of optimization. How do I approach it?
Do you have eccentric to claim fame? Or can you be calm and cool, what are some examples for people who achieved this and can they be copied? Surely just proving something important doesn't suffice, you need character.
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>>8561889
write a mass-audience book explaining how the universe is made of 17-dimensional differential functoroids
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Become a polemicist and grow an over inflated ego, make sure you're always right. Also don't forget to drop pop culture references once in a while.
Otherwise no one will care.
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>>8561895
>>8561899
Just to clarify, I don't talk about Michio Kaku or Neil Degrasse Tyson old silly over motivated father figure fame.
I'm speaking of One Direction kind of fame where you can take the two todays audience girls of your choice back to your van after every show.
But yes, finding an audience will be part of it, I suppose.
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Hey guys, so I am going to be taking statistics and probability for engineers and scientists next semester. I have heard different things about this class so I was wondering how hard is this class compared to say differential equations? I took DE this semester and got an A.
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>>8560663
I flip a coin then roll a die. If the die lands on 6, what is the probability that the coin will then land on heads?
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1/2
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>>8560663
Stats is the easiest Fucking math course you will ever take hands down. At any level it takes basically 0 thought.
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What happens if two objects which are both travelling at light speed toward each other collide?
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They annihilate eachother and turn into light
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LHC
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they make a crapload of particles
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Since it's Christmas, I want to thank some of you faggots. I'm sure mods will probably delete this thread and ban me, but I feel like saying it anyway.
Context
>have shitty upbringing, be depressed social outcast, completely give up on education and basically everything except video games
>completely fail maths with the lowest possible grade and leave high school without knowing how to convert a fraction to a decimal, do long division, add fractions, etc.
>slowly get interested in education over time, get the crazy idea of studying engineering
>come on /sci/ asking for advice, get laughed at by most, but encouraged by others
>decide to do it anyway
>autistically study maths in my room everyday from the beginning, starting from learning the multiplication table and going all the way to differential and integral calculus
>2 years later studying engineering in a Russel group uni after sitting an alternative entrance exam
So thank you faggots. Have a good Christmas.
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Merry Christmas.
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I'm happy for you, anon. Merry Christmas.
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>>8560149
Merry Christmas fa[math] [/math]m
Anonymous
Mathematical rigor in physics (calculus) 2016-12-24 06:04:09 Post No.8559804
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Mathematical rigor in physics (calculus) 2016-12-24 06:04:09 Post No.8559804
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Mathematical rigor in physics (calculus)
Anonymous
2016-12-24 06:04:09
Post No. 8559804
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Is it necessary to learn calculus rigorously (with proofs) to have a good understanding of physics? Or is learning the basic concepts and some of the computational aspects of calculus enough to take you far in physics?
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>>8559804
it depends, you'll need to know some math eventually, but it's better to learn it as you go, whenever you need it. you'll need to get up to differential geometry to understand relativity well, but there are good "for physicists" resources available
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>>8559804
It depends on what your goal is. If you want to eventually study high level theoretical physics, you might as well start doing the rigorous mathematics now.
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>>8559814
Where do I start?
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I don't get gravity and I don't get space. How does space supposed to work? Look at the picture. So when the Earth sinks into the space and makes a dent that's what gravity is supposedly. Is there space above earth then? Also the distance in the picture isn't even up to scale, that moon is actually like half a football length away from the Earth. How does the moon even get attracted by the earth's dent when it's so far? I've read about it from many different sources but it just doesn't make sense to me and I can't imagine it.
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>>8547315
>How does the moon even get attracted by the earth's dent when it's so far?
Because it's not far enough to not get attracted by it
What do you want us to say?
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>>8547328
I think that there's something wrong with either how we view space or how we view gravity.
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>>8547340
What, just because you think the moon is too far away to be affected by the earth's gravity?
Listen, the earth is real heavy.
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How can organic lifeforms even compete?
> J U S T
http://www.dailymail.co.uk/femail/article-4060440/Woman-reveals-love-ROBOT-wants-marry-it.html
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>>8563886
>Marrying to giant talking dildos
Most humane and profitable way for overpopulation control. I approve of this.
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> tfw gf only wants you for your BRD
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Has there been on studies done on why women stay with their abusive spouse and refuse to leave them despite all the pain they go through? Is it a human trait or like a mental illness?
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>>8563704
It's because they realize it was their fucking fault.
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>>8563704
Women like bad boys, duh.
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>>8563750
This
Why are fractions so confusing to me? Specifically division of fractions.
They really completely gloss over this fact in highschool - at least it was never mentioned to me why we actually do that when dividing fractions.
pic related, I don't solve it her way. I wrote it as a proportion and solved it that way. Which demonstrates that I don't actually know what I'm doing conceptually. Which means I don't actually have a visual conceptual understanding of fractions.
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>Why are fractions so confusing
Because division is not associative.
(a/b)/c != a/(b/c)
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>>8563500
Specifically,
(a/b)/c = a/(bc)
a/(b/c) = (ac)/b
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>>8563448
>Why are fractions so confusing to me? Specifically division of fractions.
Perhaps try writing everything in exponent form and it will make more sense.
i.e. 2/(1/2) = 2^1 / 2^-1 = 2^(1-(-1)) = 2^(1+1) = 2^2 = 4
I've heard that getting injections of teen blood when you're old would make you live longer.
Is that true ?
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I hope so.
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>>8563440
I prefer to drink it.
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>>8563440
Yeah, that's how the rolling stones keep themselves alive
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>wish for text-books
>get only meme-books
I have about $1k to spend. Recommend me something nerds. Any field is fine; I'm only reading for fun anyway.
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>>8563432
Just torrent some Evil Genius books.
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>>8563432
http://gen.lib.rus.ec/book/index.php?md5=D52034C76BE6482AD26BAC6E98444C54
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>>8563432
http://4chan-science.wikia.com/wiki/Recommended_material
/thread
Anonymous
Deep fucking dreaming? 2016-12-26 12:43:31 Post No.8562807
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Deep fucking dreaming? 2016-12-26 12:43:31 Post No.8562807
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What the fuck is this shit?
I want you to tell me what this is right now you fucking nerds. WHAT IS IT?
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>>8562807
https://www.youtube.com/watch?v=BsSmBPmPeYQ
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>>8562824
That guy looks like a cuck. Fuck you, you dumb fucking nerds.
Why does it see dogs in everything?
Fuck you.
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when i kinna take LSD this kinda stuff i see
like, xactly like dis
so you tellin me
computers on LSD too now? world far gone man, wold fare gon.... maybe AI wont dstroy mankind after all.... red pilled n all