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/sci/ Science & Math

Threads added between 2016/11/30 and 2016/12/07

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Most viewed threads in this category

A fly and a steel plate

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My friend gave me this problem to solve cause why the fuck not. I'm stumped but I want to see if anyone here can solve it. How fast would a housefly need to be traveling in order to puncture a 1.5in (3.81cm) thick steel plate? Here's some constants for ya Mass of fly: 21.4mg Density of fly: 100kg/m^3 Density of steel: 8050kg/m^3 >so how about it anons?
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Is studying Biology a meme? Can you actually find a job afterwards?

effects of sex on your body

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can you guys and so on help me out. please tell me everything you know about the effects of sex on your bloodpressure, health and stuff. thank you
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Is hooker sex different than real love sex? do different chemicals get released?
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Whats more efficient to produce a sound or singing, a human or a speaker?

Dealing with depression

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Not really hard science, just psychiatry and psychology. Just how do you guys cope up with debilitating depression? Lost my job, my closest friends don't want to come near me and I'm always feeling down whenever I'm alone or by myself. I do have a girlfriend I can relate to and a family by my side but it hurts to be like this when I haven't done anything wrong. I've been browsing 4chan as a means of outlet but at the end of the day, you just reflect that you've wasted your time doing nothing. What do you guys do to battle such things as depression and degeneracy of the world at the same time? Feels hopeless. >inb4 an hero >inb4 kill urself I'm not at that stage yet. Not even taking meds because they should be taken as a last resort when you're about to lose your mind.
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What are the main differences between Electrical and Computer engineering? I know EE uses a fuckton more calculus, and CMPE a fuckton more programming. But how else are they different and how are their career prospects in the far future? t. concerned 2nd year university student who has to decide at the end of this semester which major to branch to pic related, my school
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why dont you ever see x-axis of imaginary plane and y-axis of imaginary plane? and area of a circle radius i would be A = pi*i^2 = -pi

How were dinosaurs so big?

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There does not seem to be any accepted scientific explanation as to how and why dinosaurs were the size of mini skyscrapers. Just how were dinosaurs not crushed by the effect of gravity?

Headphone efficiency

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I'm in a Physics of Music course right now and we're doing some projects at the moment. I'm currently trying to determine the efficiency of a pair of headphones. How I would calculate it would be ?= (Power_out) / (Power_input) What I can't seem to find is the power output of the headphones at a certain distance. I know the power input of a headphone jack is something like 10-20mW (please correct me if that's wrong) so that's the value I would use to calculate. Any help anons?
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Calling all biologists and health people! I bought some Emergen-C, will this stuff actually make me healthier if I drink a pack a day?
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Why are there no large-scale, well-funded efforts to significantly remediate the biological ageing process through scientific and technological means? There seem to only be a handful of small charities with a few researchers and annual budgets in the low single digit millions of dollars; and a few researchers at a smattering of universities. It doesn't seem to be considered a very big deal; why is this, given that everyone in the world will suffer as a result of ageing - and the intensity of the suffering is usually quite severe - and there seems to be no in-principle reason why we could not do an awful lot more to significantly reduce - or even prevent - that suffering? In particular, why are there not even any eccentric billionaires pumping serious money into this? It would be one thing for this to not be an issue that governments and their associated research institutes took seriously; but the fact that very few private citizens with considerable resources seem interested is particularly strange. What gives?
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bezos /ourguy/ will be the first to hit 1 trillion. he wants to get into asteroid mining and amazon will soon take over the retail world.

Do you worry for this man's wellbeing?

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Elon Musk is a serious contender for the most prolific man of the 21st century, and you can't do that without making some enemies. Make amazing vehicles >piss off automobile industry Make solar rooftops, cheap solar panels, and most advanced battery storage to date >piss off entire energy industry Make worldwide, low latency, 1TB/s, FREE internet available to everyone >piss off entire communications industry He's changing the game forever, and there will be many billionaires who will be affected by this. I hope that Elon isn't sabotaged or worse. I would volunteer to be a member of his security force, or a COINTELPRO agent if needed - ANYTHING as long as Elon and his vision remain safe.
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So I was wondering if anyone can verify this answer. For the moment of inertia, it's the sum of the mass times r squared, or in integral form, r squared times dm. Why is r squared left as a constant in the integral? Isn't r also changing according to each dm? So I asked this to a physics major, and he told me to just take it as it is, since I'm only taking single variable calculus atm. He said the actual integral involves multivariable calculus, hence there would be a dr. Can anyone verify if he's correct?
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30k in it for ya... http://www.sciencealert.com/nasa-admits-it-needs-the-public-s-help-to-figure-out-what-to-do-with-all-its-astronaut-poo
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>want to major in Wildlife Sciences >everyone else in by class wants to be an engineer, medical professional, or work in a hard science The follow your passion thing isn't a meme right, and those AP gunner kids will switch majors or drop out while I major in something I enjoy?
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What does /sci/ think of cryonics?

Do people see colors in different ways?

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I have been wondering for many many years, how would we know how others see the same colors, we teach that the color they see is a specific color, so they will always see it that way, but what if they see something like green as purple? We could never prove or disprove this in any way, as we cannot see exactly what other people see, and even if we did we might still see it the same as it could be a difference in the eyes.

/qmg/ - Quantum Mechanics General

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What are you guys working on? You guys have probably seen me posting here. I have been looking at quantum walks on finite absorbing lattices. You can check out some of my work on my youtube channel: https://www.youtube.com/watch?v=RqE6G_sG2do https://www.youtube.com/watch?v=8N9Kumolkks https://www.youtube.com/watch?v=EWPz9KN64rg https://www.youtube.com/watch?v=FzSft-ZDx38 https://www.youtube.com/watch?v=Pm5e0qMKOk8






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