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/sci/ Science & Math

Threads added between 2013/01/16 and 2013/01/23

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Most viewed threads in this category

14 more posts in this thread. [Missing image file: hornet.jpg]
I think I have less muscle control on one side of my face I can curl my lip in one direction on one side and not the other it's a tiny difference, but it's noticeable to me I don't want to be a hypochondriac about it, but I can't think of any reason for it other than a brain problem the rest of the internet wants to tell me I had a stroke, but I'm 19 and healthy
6 more posts in this thread. [Missing image file: ft_symmetry1.png]
Question: "Prove that the difference between two odd functions is even" http://books.google.com.au/books?id=o2E5HBgXFZwC&pg=SA1-PA38&lpg=SA1-PA38&dq=the+difference+between+two+odd+functions+is+even&source=bl&ots=sRdUST8PAi&sig=8ov8HV36Z5aBsZvPOLs4MyhNwAA&hl=en&sa=X&ei=4eD_UJj6OKWjiAffi4H4Aw&ved=0CHgQ6AEwCQ#v=onepage&q=the%20difference%20between%20two%20odd%20functions%20is%20even&f=false what
2 more posts in this thread. [Missing image file: p_008.jpg]
not specialised area like biochem/biophysics, but for everything, is there anyone with masters degrees in chemistry and physics , oreven the equivelant knowledge are there any strutured pro9ghramsa for like this
2 more posts in this thread. [Missing image file: 1358801456957.jpg]
can /sci/ help me solve this [code]Algorithm Insertion_sort for i <-- 1 to n-1 do for j <-- i+1 do in steps of -1 if key[a[j] < key [a[j-1]] then sawp a[j] with a[j-1] End Insertion_sort[/code] prove through using summation laws the is big o is O (n^2)
37 more posts in this thread. [Missing image file: Muammer_Yildiz_magnet_motor_prototypes.jpg]
"Free" energy is within our grasp /sci/ Muammer Yildriz's machine is set to begin it's testing within the month. Do you guys think it will work? http://www.youtube.com/watch?feature=player_embedded&v=mI3227d5Css
1 more posts in this thread. [Missing image file: IMG_19012013_183459.png]
Hello /sci/, I am doing my homework to turn in on integrals, and I have come across a problem. when I input solve(sin(x)+x=1.2x-1.5) it gives me some weird results that I don't know or haven't learned how to interpretate. Any help would be appreciated, I've tried google and looking on Maples support site, without luck tho. Regards.
5 more posts in this thread. [Missing image file: Lightbulb Newton's Cradle.gif]
What does /sci/ think of the graph for (-1)^x? I like the idea of a line with an infinite yet invisible amount of gaps within it gif unrelated
14 more posts in this thread. [Missing image file: 1358209151516.jpg]
Is mathematics truly made up? Lately I've been hearing it being argued that we just invented it to understand relationships in the universe. Obviously the symbols, words, and visualizations used to describe the relationships and quantities are made up, but I'm talking about mathematics at its core. I'd think that quantities and relationships between things in our world are because of our dimensional space and laws of physics. Don't they exist whether or not we make them up? i.e. wouldn't an alien race have to come up with essentially the same mathematics to advance to the same level we are at scientifically? I'm not assuming I'm right, but with limited education in mathematics this is where I stand. If anyone with higher education has a better or different answer, I'm all ears
0 more posts in this thread. [Missing image file: 1357526978231.jpg]
Anybody here can use Minitab well? I come with a question about how to do something that I could do by hand (it's simple enough) but if I learn how to do it with tools then it will be easier for me later on. I am to calculate how many standard deviations of the mean does the 75% of the data fall. I'm to use Chebyshev's theorem but I bet there is a neat tool that I just click and get result.
1 more posts in this thread. [Missing image file: gret.png]
Hi sci, I'm really in a bind. I'm stuck on this question and cant see the light. Yes, it is homework but I'm not asking for the answer. Could someone please point out my mistake, I've clearly overlooked something, but I cant see what it is. After rationalization, the whole fraction on the right hand side becomes +1 which I know cannot be true, since I'm trying to solve for Inductive reactance (X L) Thanks in advance guys.
15 more posts in this thread. [Missing image file: Question.jpg]
Hey, science friends. I would like to ask a question. What determines if something can pierce something else or not? Like, could an electron smash through another electron whilst still remaining intact?
58 more posts in this thread. [Missing image file: 1838_cell_theory_4_cropped-large.jpg]
If cell theory states all cells come from pre-existing cells, then where did the first cell come from? I find it almost impossible that organic molecules intelligently organized themselves into single celled organisms.
6 more posts in this thread. [Missing image file: mal-reynolds.jpg]
Hello /sci/ I am a college student majoring in History but I have recently had a change of heart and want to change my major to Mechanical Engineering. I wanted to ask what should I study to prep for College Engineering courses. I recently ordered self-teaching guides for physics and calculus and wondered what else would be needed. The information would be greatly appreciated. pic unrelated
9 more posts in this thread. [Missing image file: Picture0122.jpg]
Can anyone help me! In an experiment we added Sulphuric acid, ethanol and potassium bromide and formed bromoethane. I know that the KBr first reacts with the sulphuric acid to for HBr, which then replaces the OH group. Why does the KBr and Acid reaction form HBr? And Why is HBr needed to replace the OH group? Thanks :) Pic related
3 more posts in this thread. [Missing image file: 1358745556895.jpg]
Okay time for a real life application. Assuming there is 1 full dishwasher which has completed its cycle, and the dishes need to be put away and dried, then the dishwasher must be completely refilled with a sinkfull of dirty dishes, What is the fastest and most effective way to complete this task. My thoughts: immediately remove difficult to dry plastic tuperware containers, placing them on a towel to dry whilst you do everything else. Don't dry pottery plates because they are hydrophobic as shit. However I am still debating whether to get them all dried, stacked until the washer is empty then put them away, or if I should just do it as I go along. Thinks? Pic 100% unrelated


6 more posts in this thread. [Missing image file: Blue_Circle_o.jpg]
http://armageddonconspiracy.co.uk/The-Enigma-of-Existence(1361286).htm any thoughts?
12 more posts in this thread. [Missing image file: Spine predat.jpg]
Why does when sometimes you stretch your body, you feel like you have disconnected from your brain and cognition. It feel like you just cut off from your grip for a few seconds, and all you can comprehend & feel is noise. Does anyone know what I mean ? Even if you felt it once, you'll know what I'm talking about. Does it stretch the nerve endings of the spinal cord near the brain that makes you feel that way ? And is there any way to simualte it.
6 more posts in this thread. [Missing image file: algy.jpg]
Hey, /sci/. I'm doing a discrete math self-study so when I take it next year it'll be cake. For the most part, it's easy, but quantifiers slow me down because it's easy to overlook some things. I'll give an example, and if somebody could explain what I'm doing wrong (if anything), that'd be awesome. Q: There are 3 reptiles; a lizard a snake and a turtle. It turns out that for each of these animals, there is someone at your school (not necessarily the same someone) who owns one. A: I defined the problem as P(x,y), animals as X = {lizard, snake, turtle} and people at my school as Y = {all people at my school}. So wouldn't it be AllX,AtLeastOneY P(X,Y)? I'm not asking you to do it for me, just please let me know if I missed some important concept.
18 more posts in this thread. [Missing image file: typical class.jpg]
Would you say you're a good teacher, /sci/? Could you be a good professor, or at least a high school teacher? Why/Why not?
20 more posts in this thread. [Missing image file: carlsaganscosmos.jpg]
sup /sci/ streaming sagan's cosmos all day come by and watch the genius that is Carl Sagan cannabros.co.nr

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