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/sci/ Science & Math

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Most viewed threads in this category

40 more posts in this thread. [Missing image file: math-calculus-diagram-DHD.gif]
I have to learn Calc 1 in a month via self-study. I have about 4 hours a day to do this. Any tips on a self-study approach? My current plan is working out of a textbook I have and watching 10-20 khan academy videos (and doing the exercises) a day. Tips very appreciated
15 more posts in this thread. [Missing image file: knuckle-blaster-stun-gun-600x450.jpg]
How many volts would it take to A) Kill a person and B) Completely incapacitate a person It's for an experiment.
8 more posts in this thread. [Missing image file: I_Want_To_Believe.jpg]
What would happen if a sun made of ice and a sun made of fire collided?
6 more posts in this thread. [Missing image file: 313409_446538135424223_151955049_n.jpg]
So I've gathered you gentlemen here today to help me solve the greatest mystery I am faced with. A Co-worker of mine claims that she can hear God talking to her sometimes. He tells her to do things and she does them. She is infuriated because he makes her try to talk to other people about their problems. Now, she has claimed to not know anything about the people she talks to, but the problems that she God tells her about are always there with them. Now allow me to shine some history here: >Pentecostal >Use to have turrets until God healed her >Later had a car crash and died >During her death she remembers being held down and not able to move only hearing "unforgiven" over and over and a light in the distance Now, gentlemen, what has happened to her? How do we explain these phenomenons? OR, if a lengthy response isn't your thing I would gladly accept any resources I could read to learn more on these topics. I'm really interested in what might be wrong with her since I've never met anyone who HONESTLY believed these things were happening. (And the searching I have done has brought no decent answers). Thanks kindly.
10 more posts in this thread. [Missing image file: 531px-Atelier_de_Nicolas_de_Largill(...).jpg]
I want to read Voltaire, where should I start? Thanks in advance.
9 more posts in this thread. [Missing image file: images-computerscience-main1.jpg]
Hey /sci/, CS major here I keep hearing you guys say that most CS programmes are shit-tier/babby-tier. So, what would you change to make them better? What courses woudl you add/change/make mandatory? What topics do you think that deserve more attention? (I know this will probably span a troll thread, but I'm looking for some stuff to learn during the summer and this seems like a good way to find out topics)
24 more posts in this thread. [Missing image file: Untitleb.png]
78 more posts in this thread. [Missing image file: lumberg.jpg]
Worst exam experiences thread Mine: Just came back from a final year structural engineering exam. Catastrophic failure. If I fail the unit, I don't know if I even get my master's degree or not. Even the hardcore clever kids were in shock afterwards. One girl started crying during the exam, 3 people walked out half way through. Reasons: 1) Concrete parameters missing from paper 2) Derivations not covered or even mentioned in the course material (incl. reading list) 3) Paper was nothing like any past exams 4) No derivations that were covered in course material were even mentioned on the paper 5) Questions involved no explanations or written answers on the concepts behind the calculations, just pure calculations (Without the necessary parameters required to complete the exam) 6) 3h exam shortened to a 2h exam with exactly the same amount of work, if not more. The professor and the head of the department are getting several large pieces of my mind in the morning via email. Not to mention the shit-storm from the dozens of other people who will be sending complaints through.
14 more posts in this thread. [Missing image file: iss.jpg]
Can someone please explain to me why the ISS is moving like this http://www.isstracker.com/home instead of moving in a straight orbit line around the eath. Why does it swing so much?

Scenario

10 more posts in this thread. [Missing image file: 1369819772275.jpg]
Bill Gates gives you his money and you are given the task to start humanity on the path to exploring and colonizing space. What do you do and how would you do it?
86 more posts in this thread. [Missing image file: xooter17.jpg]
So, who was the most intelligent person in history? some notable first round choices: De Vinci, Newton, Einstein, Archimedes of Syracuse, Tesla, Sun Tzu...
30 more posts in this thread. [Missing image file: aliens.png]
What the fuck is up with these people? Do they actually believe what they're saying or is this some sort of a joke? http://www.youtube.com/watch?v=hX06nI04j0g And it's not like this is the only video. You've got tons of high ranking officials talking about this shit and thousands of videos of conferences like this one. Personally I feel like this is all a giant prank since, if there are aliens here then why the _fuck_ would they be hiding and collaborating with governments? That's so stupid it hurts my brain. Why would a species that has advanced to the point where they can basically break rules of physics to get here, want to have anything to do with us? They would either destroy us or, you know, ignore us. Care to elaborate, /sci/? Are all these people wackos or are they actually trying to get some truth across, however unlikely? What the fuck is up with all these talks?
10 more posts in this thread. [Missing image file: download (15).jpg]
This might belong on /adv/, but I'm not quite sure. I was thinking about maybe learning some computer science via self-study, and was wondering what the best way of approaching this was? I was thinking watching khan academy, but in terms of a book, what does /sci/ recommend? I'm a bio guy, so I've never really gotten into comp sci, but it seems interesting and couldn't hurt to at least try it. Any help is appreciated.
4 more posts in this thread. [Missing image file: 1354558051101.jpg]
Have any of you studied the career of biotechnology? What is it like? Is it difficult? Do you use the lab often or is it more lecture-like? Lots of maths?

A question

0 more posts in this thread. [Missing image file: 220px-PIC18F8720[1].jpg]
Can microcontrollers work with large voltages, say 230V's at between 1-13 Amps ? If not does that mean if you want to work with these voltages you need to incorporate analogue components with the microcontroller or just purely analogue components ? I'm just trying to understand whats possible with electrical engineering here. Thank you.
8 more posts in this thread. [Missing image file: 1345564289590.jpg]
Sup /b/. y u no trap thread? Trap thread? Trap thread.
15 more posts in this thread. [Missing image file: Tropical-Tower-Wars-An-Exotic-Tower(...).jpg]
What is the science that finds the optimal way to build in Tower Defense? The usual TD have a lane in which monsters passes, and you build away from that lane. A variation of that is having some buildings or units that can block the path. But where the math really happens is when you're the one making your own path with your towers, pic related.
13 more posts in this thread. [Missing image file: 1369636482587s.jpg]
>mfw tits

Can WiFi Signals Stunt Plant Growth?

10 more posts in this thread. [Missing image file: danishexperimentwithwifi.jpg]
>A Danish science experiment by a group of 9th-graders has gained worldwide interest and may have us rethinking the proliferation of wireless devices in our homes. Five girls from Hjallerup Skole, a primary education school in Denmark, began the experiment after noticing that when they slept with their cellphones near their heads overnight, they had trouble focusing the next day, according to Danish News site DR. The resources weren’t available to conduct an experiment around wireless signals affecting brain activity, so instead the girls decided to monitor the growth of plants near WiFi routers – and the results were a bit shocking. Six trays containing the seeds of a garden cress herb were placed in a room without a WiFi router, and six trays were placed in a different room and next to two WiFi routers which, according to the girls’ calculations, emitted about the same type of radiation as an ordinary cellphone, reports DR. During the 12 days of the experiment, the seeds in the six trays away from the WiFi routers grew normally, while the seeds next to the routers did not. In fact, the project photos show that many of the seeds placed near the routers turned brown and died. >http://abcnews.go.com/blogs/technology/2013/05/can-wifi-signals-stunt-plant-growth/
22 more posts in this thread. [Missing image file: thenexttesla.png]






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