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/sci/ Science & Math

Threads added between 2012/09/19 and 2012/09/26

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Most viewed threads in this category

26 more posts in this thread. [Missing image file: NewtonsCradle.gif]
If a Newtons Cradles was placed in a vacuum so that there was no air resistance. Would it keep swinging forever? If so, how difficult would it be to make? If not, what would slow it down?
2 more posts in this thread. [Missing image file: 1348012294234.gif]
astronomy question: if you were standing at the earth's south pole, which stars would you see rising and setting? im guessing the answer is no but i cannot argue why. can you fill me in?
13 more posts in this thread. [Missing image file: 1347829077087.jpg]
Alright so why the fuck do I suck at chemistry so bad that I freeze up on the tests and bomb them? College chemistry by the way. Just took my first test and got my ass handed to me despite spending ridiculous amounts of time with the material
10 more posts in this thread. [Missing image file: consider the following.jpg]
What's the algorithm for winning the "toothpick game"? The rules are two players alternately take 1-3 toothpicks from a pile that initially has 11. The goal is to leave the other player with the last toothpick.
43 more posts in this thread. [Missing image file: Consider the Following.jpg]
Put these in order from Favorite to least favorite Bill Nye Carl Sagan Michio Kaku Neil deGrasse Tyson Stephen Hawking
10 more posts in this thread. [Missing image file: frustration2.gif]
Need help /sci/ I just started grad school in physics (phd program). I had taken a grad course on QM at my undergrad, so the advisor recommended I take QFT especially since I was interested in joining the theory group there. But I feel seriously under prepared for this course. I haven't taken any group theory at all, nor differential geometry. I'm able to understand only about 70% of the math steps that are talked about in class, however I feel like I'm understanding like 2% of the concepts. I need to do good in this course, I can't drop it because I need to take so many hours or I get thrown out of the program, and if I don't maintain a certain GPA I get thrown out too. Plus I want to join the theory group eventually so if I ask to join and they see I got a B or C in QFT that will look really bad. How screwed am I? Can anyone offer advice?
25 more posts in this thread. [Missing image file: 13419yo.jpg]
Give me your Adam Savage %-chance thing of what you think is going to happen when we get in contact with aliens. 10 % they will ignore us 20 % war will happen 30 % business and partnership 40 % they see content of our internet and then ignore us
32 more posts in this thread. [Missing image file: James_Watson.jpg]
>While speaking at a conference in 2000, Watson had suggested a link between skin color and sex drive, hypothesizing that dark-skinned people have stronger libidos. His lecture, complete with slides of bikini-clad women, argued that extracts of melanin – which gives skin its color – had been found to boost subjects' sex drive. "That's why you have Latin lovers," he said, according to people who attended the lecture. "You've never heard of an English lover. Only an English Patient." >On October 25, 2007, Watson was compelled to retire as chancellor of the Cold Spring Harbor Laboratory on New York's Long Island and from its board of directors, after he had been quoted in The Times the previous week as saying "[I am] inherently gloomy about the prospect of Africa [because] all our social policies are based on the fact that their intelligence is the same as ours—whereas all the testing says not really Does he have a point or is he just a racist person?
1 more posts in this thread. [Missing image file: 00-omgfire.jpg]
what is the temperature of a average lighter? can it mold metal?
4 more posts in this thread. [Missing image file: 5875.jpg]
4 more posts in this thread. [Missing image file: 1347219120031.png]
http://www.pnas.org/content/early/2012/09/14/1213115109.full.pdf?etoc xmfd hahahahahahaha
4 more posts in this thread. [Missing image file: 1347478783008.gif]
"Study science Study math Take a shower Take a bath" - Jesus Aych Christ

Irradiation and stuff

0 more posts in this thread. [Missing image file: 4356t.png]
I have a question for you /sci/ about radioactivity and being exposed to radiations. i've read a lot about disintegration of atoms, nuclear reactions, W/Z bosons, free neutrons and high energy photons...but something escapes me there and I have always been ashamed to ask something that simple. When you're exposed to X-rays or any ionizing radiation, the body and organism receives a dose of radiation ; but how does the body stores this radioactivity ? does it escapes immediately or does it stays forever inside the body, leading to cellular mutations (pic not related, i hope) being the cause of all the radiation-related cancers and diseases we know.
3 more posts in this thread. [Missing image file: carl.jpg]
Accuracy of Myers Briggs personality test? I've taken it about 7 times. First time I got ESFJ which sounded nothing like me. The next two times I received ENTP and the last 4 times I've received INTP. These sound a good deal more accurate. What are your experiences?
2 more posts in this thread. [Missing image file: infinite-series-square.jpg]
Homework question that I'm stumped on. Geometric Series. Okay here goes. A culture initially has 5000 bacteria, and the number increases by 8% every hour. a) How many bacteria are present at the end of 5 hours? b)Determine a formula for the number of bacteria present after n hours Variables should be T1= 5000 r= 1.08 n= 5. I plug them into Sn= T1(r^n - 1) ---------------------- r-1 But I keep getting 29,333. The correct answer is 7356. Any help would be great. HS fag btw
11 more posts in this thread. [Missing image file: manymanymanymanymanymanymany.png]
i wonder if i will have to do a lot of integrals for this class
1 more posts in this thread. [Missing image file: GRE.physics.jpg]
I'm in my third year as a physics undergrad now and I'm looking at taking the Physics Subject GRE soon. How early should I look at taking it? I was thinking of taking it this Spring and (if I do poorly) taking it again next Fall. Is this a good approach or should I look at taking it earlier? (this Fall) Any tips for the exam?
6 more posts in this thread. [Missing image file: photo.jpg]
How do I use an abacus?
5 more posts in this thread. [Missing image file: Chrysanthemum.jpg]
When you look at a certain far away place in the space using a hubble telescope, what are you looking at exactly? Is it what currently happening at that place? Or many things happened already before the image reached you? Does my question make any sense? Not a /sci/ regular. Sorry for my English. I hope you catch my drift.

Citation request

2 more posts in this thread. [Missing image file: 1348471465845.jpg]
ikenbot.tumblr.com/post/32276769764/eternal-clock-could-keep-time-after-universe Hey, i'm a lowely non-hard science major. Would someone care to explain this, or perhaps reference a scholarly article for me to read. I'm too smart for pop-science, but not knowledgable enough to tackle the papers. Anything in between is appreciated. Thanks!






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