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/sci/ Science & Math

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Most viewed threads in this category

Starting Out With Java: From Control Structures Through Objects PDF

19 more posts in this thread. [Missing image file: 41O2dc6AaqL._SL500_AA300_.jpg]
Hello /g/. I am looking for a proper PDF for the book Starting Out With Java: From Control Structures Through Objects. I tried looking for it online but could only find one version on Pirate Bay and all the file lockers. The problem with that version is that the text is very low quality making it hard to read. It is basically just a straight scan without addition of any tags or bookmarks. It would be great if you could find me a better version of this book. I would prefer fifth edition but fourth edition would also be great. Thanks!
10 more posts in this thread. [Missing image file: 3d1.jpg]
At 35 degrees C, K=1.6x10^-5 for the reaction 2NOCl -> 2NO + Cl2. Calculate concentration at equilibrium when 1 mol NOCl and 1 mol NO is initially put in a 1L flask. How do I set this shit up, it makes no sense to me.

Handwriting & Intelligence

34 more posts in this thread. [Missing image file: lot_stevens_witness_statement.jpg]
"On average, people with messy handwriting are more intelligent, for the following reasons: 1) Messy handwriting is intended mainly for the writer to read and not others, this indicates the writer is introverted, and therefore more inward thinking and intelligent. 2) When the writer reads the messy writing. He is reading fragments from the page and filling in the illegible gaps with his memory and predictions. As writing and reading is a common occurrence, messy writing would increase intelligence. 3) Messy writing may be the produce of fast handwriting, which would be needed of fast-thinkers." /discuss
2 more posts in this thread. [Missing image file: 897.jpg]
exp(-ix)=cosx-isinx square both sides exp(-2ix)=(cosx)^2 - (sinx)^2 - i2sinxcosx l.h.s can be written again as cos2x-isin2x=(cosx)^2 - (sinx)^2 - isin2x cos2x=(cosx)^2 - (sinx)^2 cos2x=2(cosx)^2 - 1 voila!
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Need halp. The mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6. What is the probability that an individual's clotting time will be less than 7 second or greater than 8 seconds. Assume normal distribution.
8 more posts in this thread. [Missing image file: 250px-Blue-white_test.jpg]
Hey /sci... Studying for finals week. Came across this homework question I got wrong for my Biotechnology Class... I earned 4/10 points... Can someone point me in the right direction? >>QUESTION: You are cloning the genome of a new DNA virus into puc18. You plate out your transformants on ampicillin plates containing x-gal and pick one blue colony and one white colony. When you check the size of the inserts in each plasmid (blue and white), you are surprised to find the plasmid from blue colony contains a very small insert of approximately 60 bp, while the plasmid from white colony does not contain any insert at all. Explain these results. >>MY ANSWER: Blue colony may have the insert upstream or downsteam of LacZ gene, allowing it to function normally. The insert should be found in the middle of the gene for blue/white isolation. The LacZ gene from the white colony was obviously interrupted but since the viral DNA is not there, perhaps it had some affect on the lac operon and shut it off, preventing the release of the dye from X-gal.


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chemistry thread

3 more posts in this thread. [Missing image file: 1367072494466.jpg]
hey /sci/ would you help me ??? i need some examples/problems related to lipid bi-layer, like this one, the cells of the "foot" of an reindeer have unsaturations or saturations on his lipid bui-layer and why? Answer: unsaturations because the cells needs fluency to do their processes and the reindeer live in the snow so, his cells a lower fusion point, and the unsaturations dont have many interactions between them so they give the cell a lower fusion point, i dont know if im explaining myself. pic unralated

Vitamin C testing

4 more posts in this thread. [Missing image file: tumblr_lxiq57hQKW1r6p97to1_500.jpg]
Chemistry high school student anon- Does the freshness of things effect the amount of vitamin C in it? So like; if you had lime juice and it expired, would the vitamin C contents reduce? (Not drinking it, just testing the stuff)
18 more posts in this thread. [Missing image file: polyphasic-sleep.gif]
Does polyphasic sleep make you into an uber thinker? Famous polyphasic sleepers; Da Vinci Henry Ford Ben Franklin Thomas Jefferson Einstein Tesla Newton George Washington Carver Anyone have any experiences with this?


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4 more posts in this thread. [Missing image file: RoboBees.jpg]
apparently these things can technically fly but need to have a power cable tethered too them so thats rather limiting could power be microwaved to them? solar panels built into the wings?
19 more posts in this thread. [Missing image file: woats.jpg]
Can't we organize a to-do to-learn list and group for /sci/? I can think of a fucked up algebra problem, 'tis this: Given a random generator through time, what is the chance the next sequence of elements equals the previous? Post logic. Fuck you, troll.


1 more posts in this thread. [Missing image file: mojave_580 (1).jpg]
cengage.com/owl is a great resource for practicing gen chem and there is an ebook attached
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1 more posts in this thread. [Missing image file: entangled_sm[1].jpg]
Hi /sci/, I'm not a frequent visitor of this board, but I gotta ask... Can we use quantum entanglement to achieve 0 latency communication? From what I understand, waves have to travel while quantum entanglement is just instantaneous. Recently learned about the transatlantic telegraph, will this be the another giant step of distant communications? http://www.youtube.com/watch?v=9lOWZ0Wv218

Function for a body of rotation/solid of revoltuion

7 more posts in this thread. [Missing image file: fancyfunktion.jpg]
Hi there, I am in need of help. I am currently doing first steps in computer graphics in my 4th semester in university. Everything is working fine, we are using Open Scene Graph, and so far I am not running into unsolvable problems. So what do I need help with? Well, I want to model a body of rotation or solid of revolution (I am not sure whats it called in english) and I am in need of functions! I am not that big into math, so I dont really know any fancy functions that are usefull for my purpose. The picture shows what I have in mind, but it doesnt have to be strictly like that. If you know any or can point me to where I could find some, that would be awesome. Thanks in advance!
24 more posts in this thread. [Missing image file: 1357346824965.png]
Failiure of chemistry here, H_{2}O forms because Oxygen needs two electrons to reach an 8 electron valence shell, it is leeching two electrons off of the Hydrogen, yes? Hydrogen also needs two electrons to reach a Helium like shell and they will leech off of those two electrons for stability, yes? How and why do things form that wont even neccesarly be stable like, H_{2}O_{2}, how/why does it form when it barely benefits the orbitals, it'd be so much easier and less energetic for it to just become water?
0 more posts in this thread. [Missing image file: imagesCAS0.jpg]
What is an effective way of removing fluoride from the water? Ever since I started drinking more water I've been experiencing nightmares and overall numbness with the inability to move in my body.


14 more posts in this thread. [Missing image file: 800px-Firefly-luciferin-3D-vdW.png]
Does anybody knows is it possible to synthesise luciferin?

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