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/sci/ Science & Math

Threads added between 2013/02/27 and 2013/03/06

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Most viewed threads in this category

8 more posts in this thread. [Missing image file: map00190.png]
Hey, /sci/. I've got a Bio 101 short essay question that is killing me and taking up time that I could be using more productively for other schoolwork. If you guys could help me out with this within the next 3-4 hours, I would be extremely grateful. Hell, I wouldn't mind giving $5-13 via PayPal to whoever could first take the time to arrange a good answer (close to 100 words). Here it is: Explain how oxidative phosphorylation is an example of how new properties emerge at each level of the biological hierarchy.
13 more posts in this thread. [Missing image file: Fphoto-44349803D-2RM[1].jpg]
dear /sci/ why the FUCK is my 10 molarity HCl turning fucking yellow? it's clear then i pour it into glassware and it turns yellow. my equipment is fucking clean. what the fuck is going on? is the HCl being oxidized producing chlorine? pic semi related. not that yellow, but fairly yellow.
7 more posts in this thread. [Missing image file: algebraic-graph-theory-c-d-godsil-p(...).jpg]
Anyone have a PDF of Algebraic Graph Theory by Godsil and Royle? I need it to study for the upcoming USAMO.
6 more posts in this thread. [Missing image file: 1329007439537.jpg]
The automatic opening device of a military cargo parachute has been designed to open when the parachute is 200 metre above ground. The manufacturer claims that the opening altitude of the parachutes has a Normal distribution with the mean value of 200 m and standard deviation of ?=30 m. (a) Equipment damage will occur if the parachute opens at an altitude of less than 100 m when it is dropped from the air. (i) Calculate the probability of equipment damage to the payload of a parachute dropped from the air. (ii) Calculate the probability that there is equipment damage to the payload of at least one of the five independently dropped parachutes? I've completed part one - but I'm struggling with part two. Can anyone give me a hint? I know I'm working with z-scores and the tables but I'm confused. Many thanks.
30 more posts in this thread. [Missing image file: antenn16.gif]
Do antennas actually attract radio waves from long distances or do they not attract them at all and only act on waves in their immediate vicinity?
92 more posts in this thread. [Missing image file: Millenium-bare-590x442.jpg]
Does the universe have a tick rate? or something such that an event happens and is sort of processed for that particular interval in time, before it is expressed in reality?
0 more posts in this thread. [Missing image file: hs-2004-32-d-large_web.jpg]
https://docs.google.com/document/d/1r6lqZTKOyv6Uk0MP-KyU8ZzX17Ct48vc85c2zXyrEz0/edit?usp=sharing Comment pls
10 more posts in this thread. [Missing image file: Fit x Genius.jpg]
Which are more arrogant, the narcissistic meathead or the 16 year-old maths genius? Of course those are stereotypes. The question would be better fomulated as follows: who is more arrogant, the guy who works out a lot or that nerd who is brilliant at maths? So which one would be easier to be friends with? I ask that because always people look down upon bodybuilders as being obsessive and arrogant while admire the more intelectual types. But I think it's completely the opposite. The intellectual one are the most arrogant and obseesive. >It's so hard to be a fit male these days

Cellular Biology

31 more posts in this thread. [Missing image file: eukaryote.gif]
Totipotency, i.e., Cell Differentiation, is common in most (if not all) instances of multicellular life. There have been instances, however, of unicelluar organisms transforming between cell types between generations. There are documented species of Amoebas which transform between Cysts and Flagellates. This means that unless there was convergent evolution, Totipotency existed in cells BEFORE multicellularity. In layman's terms, Stem Cells existed before multicelluar lifeforms existed. Discuss.
3 more posts in this thread. [Missing image file: Biological Machine.jpg]
http://www.sciencedaily.com/releases/2013/02/130228093823.htm Does this mean telepathy is possible? Feb. 28, 2013 — Researchers have electronically linked the brains of pairs of rats for the first time, enabling them to communicate directly to solve simple behavioral puzzles. A further test of this work successfully linked the brains of two animals thousands of miles apart -- one in Durham, N.C., and one in Natal, Brazil.
6 more posts in this thread. [Missing image file: Type3.gif]
Chemistry question: Is it dangerous to grind ammonium nitrate into a powder? My understanding is that it becomes explosive when mixed with Al powder, so it probably wouldn't be with anything aluminium
46 more posts in this thread. [Missing image file: 136027483220.jpg]
Why are girls aged about 12-16 so alluring?

Is Western Science Dying?

77 more posts in this thread. [Missing image file: Scientist_dead_blood.png]
Is the Western scientific academia dying? We haven't had any paradigm shifts concerning the universe for many decades. Contemporary scientists are plagued with scientism and know shit nothing about philosophy or metaphysics. On the other hand, the USA has truckloads of anti-intellectuals who are willing to brush off science as heresy. No new math fields are being produced. We don't have the modern equivalent of Newton inventing calculus anymore. Are we the new Muslims? Should I worry about my children living in a post-modern dark age?

black holes

7 more posts in this thread. [Missing image file: url.jpg]
Hey /sci/, i was wondering if u could tell me if in theory i was to stand in the middle of a black hole and hold a flash light, would i see the light? me and my friend were talking about this and i came up with that if i point it at me i would see it but not if i pointed it out and i would see the light of everything outside the black hole
14 more posts in this thread. [Missing image file: Lighthouse.jpg]
Hi everyone. I'm 18 years old, and I started getting episodes of insomnia in early January (I was 17 at the time, my birthday is in February) and in February it developed into something more persistent. I tried diphenhydramine as well as melatonin and nothing seems to be helping me. I feel deprived of motivation, no libido, and dumber than ever before. It is now March, and although the insomnia has been somewhat alleviated, I still don't get enough sleep during the night. I have accumulated an overwhelming amount of sleep debt and I feel absolutely dead mentally. To worsen my situation I have school to tend to as well, (and they are AP classes). I want to return to my original mental state very much. I wanted to know whether insomnia causes permanent/irreversible brain damage (especially at my age since I'm only 18 and my brain is still evolving). I sleep better now, but I still feel tremendously burdened mentally by brain fog due to my sleep debt. Please reply asap. Your feedback will be immensely appreciated.


6 more posts in this thread. [Missing image file: 83056702.gif]
'Evnening /sci/ Is particles enough in order to create life?
9 more posts in this thread. [Missing image file: protein.png]
Is there a program to simulate whole protein reaction with an organic chemical compound ( ligand) and how is changes it conformation?
11 more posts in this thread. [Missing image file: 3426234.jpg]
May be a noob question but here goes, Isn't a gene just three nucleotides, what is the significance of three? Why do we classify them separately? The most logical thing I could come up with is let's say there are 5 DNA sequences differing in everything but a 3 consecutive nucleotides and still functional. Something like this could implicate that those 3 are the source of the function...?
4 more posts in this thread. [Missing image file: 1324186678112.jpg]
>2013 >using Mathematica >not using open source software like Sage >treating Stephen Wolfram like a god ISHYGDDT


2 more posts in this thread. [Missing image file: Penguins.jpg]
I'm stuck on a Basic Inverse Laplace Second shift theorem example. Can anyone help? (e^(-s/5))/((s^2)+4') Mega props to anyone who can help! (and show some work, not just w/a it ;) )

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