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/sci/ Science & Math

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Most viewed threads in this category

102 more posts in this thread. [Missing image file: 1365192599409.png]
Is IQ a logarithmic scale? I have an IQ of 140 and my boyfriend only scored 130. I'd like to know how to compare the scores. How much smarter than him am I? Twice as smart? Thrice? Ten times? Intuitively I'd say at least twice. So if IQ is logarithmic, the base had to be greater than 2. Thanks in advance for any scientific clarification.
59 more posts in this thread. [Missing image file: Halliday&Resnick8th.jpg]
Hey, /sci/. I am a physics major and just finished my fourth semester. I am one class behind, due to campus issues, so I haven't taken "Introduction to Modern Physics" yet. This is fine, since I've already worked this all out, but it's important that you know that I haven't gotten to that class yet. Anyway, I get great grades and all that jazz, but it feels so empty, and I feel like I forget what I've learned over the semester. At least most of it. For instance, I did phenomenal in my Fluids and Thermal physics course, but I don't know if I'd be able to get above a 40 if I had to take a test on it today, and the courses I had a tough time with, like Electricity and Magnetism, I imagine I'd be completely fucked if I had to talk about what I learned. I believe (or pretty much know. The alternative is that I can't hold on to scientific information, which I'd rather not consider) this is because I don't really do physics stuff during my breaks. Due to some things particular to my life, I had naive expectations of how college would work, and I was dumb enough to keep the idea that I would learn all that I needed to be a good physicist in my classes, without any outside information-seeking. For a while. Then I was lazy enough to ignore it when I knew it wasn't going to work like that. But enough is enough, and I've still got two more months 'til I'm back, so I figure I have a lot of time to really get into a good mindset, and relearn what I should already know and whatnot, along with other important things. Only problem is, I don't know where to start. My interest in physics (and science in general) came incredibly recently, and I had actually never had a physics course until I was about 18. So I am lost when it comes to really getting into a scientist mindset. Which is why I'm coming here. [cont]
8 more posts in this thread. [Missing image file: 994736_10151704004669879_1273658262_n.png]
alright /sci/ you're a pretty intelligent crowd, so i think you can handle this: i got a trust fund and its managed by a real dick. where your part: what questions can i ask to make this turd squirm? pic related: its the face i want him to make when he has to answer these questions >inb4 something that isn't gonna help my situation
6 more posts in this thread. [Missing image file: tumblr_lulzvdUX781qeouwao1_500.jpg]
Having not taken complex analysis yet, can anyone help me understand Euler's identity on a more fundamental level? I get that it represents rotation through the complex plane, and I understand how that can be represented as a sum of a real cosine and an imaginary sine, but the structure of the exponential form isn't something I can grasp intuitively. Why does it invert it's sign along intervals of pi? What exactly does taking something to a complex power mean in am algebraic or numerical sense? What's the relevance of Euler's number? I've been thinking about the identity a lot lately for whatever reason, and the geometric meaning of it clicked for me, but I want to understand just how the exponential form is equivalent to the trigonometric form.

Putnam/Olympiad problem of the day

8 more posts in this thread. [Missing image file: day.gif]
Daily problems at: http://math.harvard.edu/putnam/ To find threads: >>>/sci/putnam Prove that for each n\geq 2, there is a set S of n integers such that (a-b)^2 divides ab for every distinct a,b\in S.
7 more posts in this thread. [Missing image file: 1357084748388.jpg]
C10H15NO+HI+P ----> ? while under heat, this was on my chem exam, didn't know the answer, can sci tell me?
49 more posts in this thread. [Missing image file: philosopher.jpg]
According to Schrodinger, the cat is both dead and alive because no one can observe the result and determine it. But what about the cat? Can it not observe itself? Does it not keep track of whether or not it's alive? If this is true, then it is observation that determines state of reality, right? If the cat dies, it can't observe itself, so is dead. If the cat doesn't die, it continues to observe itself, and so is alive. Even if we cannot determine the solution, the cat can. If observation determines reality, then we can define a "universe" as "the observed surroundings of a conscious individual". Therefore, we all live in separate "universes" from one another. Two people observing each-other would mean their two universes are coinciding. This has to occur in a dimension transcendent to our own, a "multiverse". But who is to observe that? Some sentient, transcendent being, right?
36 more posts in this thread. [Missing image file: 2.jpg]
is math discovered or invented? is math a part of physics because it describes the rules and manipulation of shapes and numbers? if the above premises are true does math still exist if we have irrational numbers?
3 more posts in this thread. [Missing image file: tit .jpg]
So do tits burst when you smack them really hard? How much newton is needed
3 more posts in this thread. [Missing image file: 2013-06-25_09-21-12.png]
i was thinking, does the angle of a line rise logarithmically as the coefficient of the line increases? like, on a graph.
1 more posts in this thread. [Missing image file: 77142.jpg]
Greetings chemists and untermenschen. The author of these lines is in the strong need of cyclooctanone. Pyrolysis of barium azelate even under vacuum will give very small yield, also I don't have azelaic acid. Double homologization of cyclohexanone with diazomethane looks quite dirty because of epoxide byproducts, and working with tens of gramms of diazomethane for several hours is not very pleasurable. Are there any relatively high yielding chemist-friendly syntheses of cyclooctanone? Please respond.
5 more posts in this thread. [Missing image file: 1369737436617.jpg]
/jp/ here. I've got an arguement with my professor this morning because he insist that multiplication of 4(6) will commence before the division because the division sign can mean a / or a ratio. He also insist that there should be an "imaginary" parenthesis that binds [4(6)+9-3]. So...whats the right explanation in solving this problem? 8(5-8)+12÷4(6)+9-3 =
8 more posts in this thread. [Missing image file: 31-15-BuddingYeast.jpg]
Would it be even remotely possible to genetically engineer a bacteria that can not only survive, but also thrive on Luna? I used to think this was impossible, but seeing how well they can adapt has made me change my mind. This is not evolving them to terraform Luna, its simply to have them exist and stay existing there. I was thinking you could take a form of bacteria (probably Yeast since they adapt very quickly) and expose them to gradual temperature extremes. Start at 30 degrees C, and then move the temperature down to 29 and then up to 31. The ones that cannot survive get killed, but the ones that can survive. Once the population builds up again, swing the temperature from 28 to 32 and so on until you have conditions like those on Luna. I have yet to identify anything on Luna that could sustain them chemically though, and the radiation from the Sun would be a massive obstacle, as well as the lack of water.
9 more posts in this thread. [Missing image file: blackorwhite.png]
Pic related
2 more posts in this thread. [Missing image file: bulb.jpg]
a lower resistance actually causes more heat when more current flows with the same voltage, shouldn't heat be generated with high resistances though since electron movement would be transformed to heat? the higher current should not heat the conductor if it can pass with almost no resistance.
15 more posts in this thread. [Missing image file: 1357964622721.png]
I'm a high school student thinking of becoming a math major in university. Pic related, I suppose. I am really interested in studying high level mathematics. Please convince me why I am so fucked.
1 more posts in this thread. [Missing image file: heating_stanley_3.jpg]
Hey /sci/, I have a Stanley Deluxe 90 (pictured) cast iron solid fuel cooker (burn wood = hot stove/oven). My question is that if I got it hot and then dumped a bucket of water on it, would that be enough to crack it or warp it significantly?
8 more posts in this thread. [Missing image file: 20060302.gif]
how would I plot 3|x-5|+8|y+2|=25 pic unrelated
18 more posts in this thread. [Missing image file: physics.jpg]
Hey /sci/, /g/ migrant here. I'm trying to teach myself physics over the summer, but I'm not sure where to start. Would it be best to get a book from my local library, or are there online resources for learning physics?
2 more posts in this thread. [Missing image file: 1348716597906.gif]
Alright sci hit me with youre best advice on the 'basic' math and science that will be used in 10-15 years, im getting into these subjects and wanted to know whats the math and science i will reach from either a college grade level or after college..... tldr: post subject i need to learnz for future.

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