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/sci/ board - Science & Math - February 2014

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Most viewed threads in this category

http://www.generalfusion.com/slides/#gallery2>mfw... 6 posts and 0 image replies omitted. Click to view.
http://www.generalfusion.com/slides/#gallery2 >mfw they updated the general fusion website finally >mfw it actually looks pretty good, nice CSS usage >mfw it has one of the best quick primers to fusion power out there, even if it mostly just craps on MCF and ICF in favor of its own anyone else excite? when are they going to do test firings?
Any physics bros here today?... 5 posts and 1 image replies omitted. Click to view.
Any physics bros here today? What's your opinion on the tachyonic fractal theory of electrogravitational hypserspin fields? Does it have potential to become the ultimate unified theory of everything?
Really need help on this... 5 posts and 0 image replies omitted. Click to view.
Really need help on this question, with work shown so I can understand how to get an answer. A 75.000g sample of acenaphthylene is combusted in excess of oxygen which yields 35.520 grams of water. Acenaphthylene has a molecular mass of 152.19 g/mol. Determine the molecular formula of acenaphthylene.
What could we do to give this... 43 posts and 1 image replies omitted. Click to view.
What could we do to give this the most killing power, /sci/?
Does anyone else find that... 8 posts and 2 image replies omitted. Click to view.
Does anyone else find that when bad data (either intentional or accidental) gets published it can have devastating effects, even long after it is redacted? The best examples of this are found in the anti-GMO movement, where experiments that were published, redacted, and labeled as cherry picking are finding their way into the discourse of serious debate and concerns. Another example is the autism and vaccines relationship, where a single set of bad data has done years of damage to the credibility of modern bio-medical science as well as the public's health. Social science is also affected by this affliction, where organizations with strong bias opinions fund data fishing expeditions or just out right lie as in the case of the New Families Structure Study. In fact almost any issue that can have the slightest implantation of political or social bias tends to have a hand full of bad data that gets published and becomes a beacon for politically charged idiots to use as a weapon despite redaction and dismissal from the scientific community (such as global warming). How can the public be convinced that sometimes scientist are wrong and make honest mistakes, or can be unethical and have an agenda behind their data?
If 4-dimensional space exist,... 11 posts and 0 image replies omitted. Click to view.
If 4-dimensional space exist, can we ever see it and understand it in its true form? If a 4-dimensional being exists, can it see us?
Can somebody explain to me how... 0 posts and 0 image replies omitted. Click to view.
Can somebody explain to me how molar heat of vaporization and pressure works in equilibrium? I have an idea but I'm somewhat foggy on the subject.
How much longer do you think... 7 posts and 2 image replies omitted. Click to view.
How much longer do you think humanity or our "descendants" will last? What do you will end humanity?
The other day I thought about... 12 posts and 0 image replies omitted. Click to view.
The other day I thought about this a little and I wondered what's up with all the discontinuous functions. The continuous functions form a so called meager subset of the set of all functions - and they are what we spend all our time with. Definition of a meager set: Given a topological space X, a subset A of X is meagre if it can be expressed as the union of countably many nowhere dense subsets of X. You may say in mathematics we only deal with the negligible, with the almost non existent. Do the non continuous functions have no use? Is there nothing we can learn from them? Can't we use them to solve real world problems (physics)? You could say we have spent 200 years studying a specific drop in the ocean, completely forgetting about the rest.
Hey /sci/This is the first... 3 posts and 0 image replies omitted. Click to view.
Hey /sci/ This is the first time I've ever seen this type of thing on these problems and I'm completely clueless as how to deal with it. It seems like a typical equilibrium problem but there's a twist that's screwing me up. I'm given that .05625 m^3 of H2O(s) is added to a thermally isolated system of 20 L of H2O (l). I'm asked that if the ice was initially at 0 C and the liquid water was initially at 95 C, what is the final state and temperature? I converted the masses from the appropriate temperature densities and got 51.4 kg H2O (s) and 19.2 kg H2O (l), Ice is going to go through a phase change by absorbing heat from the liquid water and then reach thermal equilibrium, since q(in) = q(out), q (phase change) + q (temp. raise) = q (temp. lower) I calculated q (phase change) by looking up the heat of fusion of h2o, 334 J/g Looking up the specific heat of water and then letting x be the temperature difference, I set this up, (334 J/g)(51,400g) + (4.184 J/g)(51,400g) x = (4.184 J/g)(19,200g) x But solving for x gives a ridiculous temperature difference considering the initial temperatures, x = -127.4 K. So from what I'm getting from this is that there isn't enough heat from the liquid water to melt all of the ice, but how do I know what amount of ice will be converted to liquid to reach thermal equilibrium? I'm assuming the remaining ice will just stay there chilling. I'd appreciate any help.
Hey, I'm looking for some... 0 posts and 0 image replies omitted. Click to view.
Hey, I'm looking for some science podcasts. I'm interested in the small: quantum, nuclear. Also energy, but no solar/wind propaganda please. ~30min episodes are preferred. Any recommendations?
This is not a 4chan post...not... 5 posts and 1 image replies omitted. Click to view.
This is not a 4chan post...not a post. We are using your brain's electrical system as a receiver. We are unable to transmit through conscious neural interference. You are receiving this broadcast as a 4chan post. We are transmitting from the year two, zero, four, four. You are receiving this broadcast in order to alter the course of the space program. Our technology has not developed a transmitter strong enough to reach your conscious state of awareness, but this is not a 4chan post. The vehicle you are seeing is a heinous mistake. Do not build it. Use your productivity window to build payloads for the burgeoning commercial launch industry. You are receiving this message for the purpose of causality violation. This is not a 4chan post...

artiticial consciousness

artiticial consciousness 33 posts and 6 image replies omitted. Click to view.
Imagine you created an AI that learns to talk to humans. After some while the AI starts to express its "feelings" by saying things like "I am sad", "I am happy" etc. How would you test whether the AI is truly sentient or merely learned to use these sentences but without understanding what they really mean to us? tl;dr How to test whether a robot is conscious?

a mathematical thought experiment

a mathematical thought... 72 posts and 1 image replies omitted. Click to view.
Person A and person B are both overqualified for their high school math classes. They both decide to do more math in their free time. Person A participates in math contests and competitions like IMO and Putnam where she is very successful and wins medals and awards. All the problems she encounters there are solvable with knowledge of high school math and therefore she never bothers learning more advanced math. Person B doesn't care about contests. She picks up university text books. Upon graduating high school she has taught herself enough math to pass a BSc and MSc curriculum. She understands and can recite every proof she read. Who is the better mathematician?
Few things to be noted before... 98 posts and 8 image replies omitted. Click to view.
Few things to be noted before you respond: 1. I have a vagina from birth 2. I am not a feminist or any type of rights activist 3. Writing buzzwords like topkek, kek, lul, fedora, tipping, maximum tipping and ownage are not gonna make me respond to you anymore than someone else. I believe women genuinely do not enjoy sex (only men do). I think when women moan loudly and shit it's just a show. Also it makes sense that women don't actiely seek sex out for enjoyment and don't enjoy it naturally because if both men and women enjoyed it equally, there would be an overpopulation issue at hand. Women would want to fuck all the time, like most men do, and it would cause problems. The fact that men chase women proves my idea that women don't actually enjoy sex. Another fact that proves this is scientists still have not found the supposed g-spot in the vagina. Their findings show it is elusive and is only in some women and even in those women it's in different spots and they can't even pinpoint it. Does science support this theory?
What does this L(delta) mean... 8 posts and 0 image replies omitted. Click to view.
What does this L(delta) mean at the start of the equation?
for /sci/ 3 posts and 1 image replies omitted. Click to view.
for /sci/

Super ice?

Super ice? 6 posts and 1 image replies omitted. Click to view.
Super ice? I heard this crazy idea, which I am sure is wrong, but am having a hard time invalidating it in my head. Basically at very low temperatures materials can become superconductors. So if something were frozen in such a material at such a low point then that argument goes that it would be very hard if not impossible to melt as the super conductivity would just carry the heat away so it can't reach the melting point. So I ask is there any true to this? What materials would do this? (platinum, gold, water, ...) Surface geometry and secondary transfer impacts? My goal is to make a prison in such a fashion that it drains the victim's energy holding them near absolute zero for a very very long time. So this prison will likely be orbiting in the shadow of a planet or just abandoned in deep space. I'd really prefer to follow the laws of physics as closely as possible with this, thus I am wounder if this super ice idea has any truth to it.

Formal logic books

Formal logic books 7 posts and 0 image replies omitted. Click to view.
I've always been interested in formal logic but I've never studied it thoroughly (I'm studying engineering, so nobody ever taught me anything about that). I'd like know to learn more about it and wikipedia doesn't satisfy me anymore. Do you have any books to recommend? I was thinking about the Principia Mathematica trilogy, should I read it (online, since I can't find the books anywhere)?
ITT: /sci/ related things that... 27 posts and 0 image replies omitted. Click to view.
ITT: /sci/ related things that make you angry >People saying Dinosaurs are reptiles >People still depicting Dinosaurs as reptilian, leathery dummies >People deny anything that isn't leathery reptile as a dinosaur m-muh feathered pterosaur
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