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/sci/ Science & Math

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Most viewed threads in this category

3 more posts in this thread. [Missing image file: 09[1].gif]
I just discovered non standard analysis. It looks cool but I wonder, as a physicist, if it is worth it to learn it or not ? Any thoughts ?

More Stars in our Galaxy than Atoms in our Universe

2 more posts in this thread. [Missing image file: 1370408009250.jpg]
I recall Neil Degrasse Tyson saying that their are more stars in our galaxy then their atoms in the universe. Is this correct? Watch how he uses the words galaxy and universe.

Let's try that sequence again

7 more posts in this thread. [Missing image file: UlamSpiral.gif]
0, 3, 8, 3, 24, 1, 48, 3, 8, 3, 120, 1, 168, 3, 8, 3, 288, 1, 360, 3, 8, 3, 528, 1, 24, 3, 8, 3, 840, 1, 960, 3, 8, 3, 24, 1, 1368, 3, 8, 3, 1680, 1, 1848, 3, 8, 3, 2208, 1, 48, 3, 8, 3, 2808, 1, 24, 3, 8, 3, 3480, 1, 3720, 3, 8, 3, 24, 1, 4488, 3, 8, 3, 5040, 1, 5328, 3, 8, 3, 24, 1, 6240, 3, 8, 3, 6888, 1, 24, 3, 8, 3, 7920, 1, ... Probably something to do with communication complexity. I do not know the solution, only a few more values.

Telescope & Amateur Astronomer General

14 more posts in this thread. [Missing image file: moon.jpg]
Hey /sci/bros, I am looking to buy a telescope. My price range is around $200 USD. The problem is that I have absolutely zero experience with telescopes. I want to be able to look at stars, planets, and the surface of the moon on my camping trips. Any recommendations would be much appreciated. Also, night sky observing appreciation / anecdotes / tips are much welcome. tldr; Am novice, want a telescope for around $200, general astronomy appreciation thread.
13 more posts in this thread. [Missing image file: 135795009420.jpg]
I want to ask if someone has the habit to sit and do math for hours, every day, how you made this an habit. Or any source on this topic. Thanks.

Questions

13 more posts in this thread. [Missing image file: science.png.jpg]
Since I couldn't find one, I thought I'd make one. Just a general questions thread for if you have any basic questions that the resources sticky couldn't cover. >ITT: Basic Questions
2 more posts in this thread. [Missing image file: logo_sciverse_scopus.gif]
Does anybody here knows if is possible to get free access to Scopus papers?
36 more posts in this thread. [Missing image file: sex and gender.jpg]
Peer-review this infograph.
7 more posts in this thread. [Missing image file: 1312509608575.jpg]
Doin' some set theory. So, can there not be a set {a,a}? Is writing that out an illega move in set theory? Is {a,a} = {a}? Its just my set theory book is claiming that if a = b, then (a,b) = {{a}}, I dont see why that is. (a,b):={a,{a,b}}, so likewise (a,a) must be {a,{a,a}} Am I doing this right?
27 more posts in this thread. [Missing image file: I don't need it.gif]
Let's say I have a true random number generator that generates a random value between 0 and 1. How does one describe the probability that it outputs any given value, for example .5.
5 more posts in this thread. [Missing image file: 1373759191293.jpg]
What can /sci/ tell me about Quantum Physics? Specifically Entanglement and Causality? I have the sudden urge to know more. I tried asking /b/, but they're absolute idiots and the thread went nowhere.
3 more posts in this thread. [Missing image file: 1373660329362.jpg]
Scientific Paper/Lab Report question: Do I capitalize name of compounds? I don't capitalize the systematic name, like 2-propanone, but what about the common name (Acetone)? What about systematic names that are also the common name: Cyclohexanol, Cyclohexanone?
21 more posts in this thread. [Missing image file: dlCA7rp.gif]
>professor doesn't allow note cards on exams.
8 more posts in this thread. [Missing image file: Dry_ice_in_water.jpg]
i heard you can do amazing stuffs with dry ice... how long do i have to wait before my freezer ice becomes dry enough? right now if I pour water on it it will crack, which is kinda cool. I guess its drying out.
15 more posts in this thread. [Missing image file: Texas_Pete.jpg]
Does anyone know of a decent (and small) Latex editor you can download. I'm not after a 300MB IDE, just a simple and easy to use editor like in this link: http://www.codecogs.com/latex/eqneditor.php
2 more posts in this thread. [Missing image file: circuit.png]
>>5922052 Humanity needs to expand into space because off-world civilization will ultimately mean less pressure on Earth's unique biodiversity to accommodate humans. Moreover, expanded civilization means more industry, faster innovation, greater talent pool for creative solutions, greater diversity in cultures, access to more natural resources etc. And perhaps most of all, it hedge's humanity's bets against inevitable disasters. Lastly, it will allow Human civilization to interact on equal footing with that of Alien civilizations that have also reached space-fairing capacity. However humanity has to overcome this one obstacle, which is no desire to expand into space; it's simply not lucrative of an investment because the returns won't happen in this generation. It seems like humans are by nature woefully short-sighted. Capitalist system has allowed for expansion of industry and great innovation and creative solutions thanks to incentivising competition to work harder and smarter. But capitalist cultur and human nature are major obstacles to the next phase of human civilization, something it is necessary we pursue with all haste. So, what are humanity's solutions?
12 more posts in this thread. [Missing image file: introtoquantummechanics.jpg]
Would /sci/ recommend any of the Dover math and science books?
6 more posts in this thread. [Missing image file: tumblr_lvt9p2VfyD1qkujpho1_500.jpg]
I noticed the following sensory discrepency as I watched a music video and later thought back to the event. context: marina and the diamonds i am not a robot music video actual lyric: can you turn my (volume downs) powe(r) of(f) heard: can you tell my power of appeal rememebered: what i heard, not what i reconfirmed I find this very interesting. Is anyone doing research in this field. What are some emerging trends?

noko

5 more posts in this thread. [Missing image file: 20130724_141853.jpg]
Hey /sci/, so I'm at work right now with nothing to do. I decided to take a look at the fish tank, and observed how fish segregated themselves among their own species/subspecie or whatever. While doing so I had a thought - although fish in this tank can see their reflection, how do wild fish differentiate between what is their own species and what is not? Would this not correlate to some level of intelligence?
24 more posts in this thread. [Missing image file: Eyes_Ears_Nose_Mouth_Studies_by_nos(...).jpg]
Almost every animal have two ears and two eyes, right? (i can't even name that aren't so right now, may be squids idk) that's probably a indicator of a common ancestor but that's not my point. having two of these perceptive organs gives us several advantages like 3d projections of images or pinpointing the location of a sound more precisely. But i would think that when these organs first come to be/evolve, there should be only one and in time when it is not deemed enough the second may arise. this is purely my speculation but where are those one-eyed one-eared animals?






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