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/sci/ Science & Math

Threads added between 2013/01/23 and 2013/01/30

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Most viewed threads in this category

7 more posts in this thread. [Missing image file: 51cwd2m07uL._SL500_.jpg]
Does anyone have a pdf-version of this book? "Foundations of Astrophysics - International edition" by Ryden, Barbara and Peterson, Bradley M. (2011)
3 more posts in this thread. [Missing image file: blackcrazyface.jpg]
Hey /sci/, I could use some help. Im failing calculus right now, and have a quiz tomorrow that could save my life, but have no idea what im doing. I have some practice problems and would really appreciate some help. Here we go, Water flows into a tank at a rate of dW/dt=(1/75)(600+20t+t^2) where dW/dt is measured in gallons per hour and t is measured in hours. if there are 150 gallons of water in the tank at t=0, how many gallons are there at t=24 I have to solve each problem twice, using each method once. first one would be the antiderivative method of plugging in/ solving for a constant and the second is something with f(b)-f(a) pic related, mfw i look at this problem
12 more posts in this thread. [Missing image file: 9gAdk.gif]
Programming question. Just looking for a little guidance. It's in Java. The problem is a de Jager formula, which is w^a \cdot x^b \cdot y^c \cdot z^d You choose any number you want, call it "mu", then you personally choose four numbers, variables w x y and z. The formula asserts that for exponents a b c and d, each can be any number from the array {-5, -4, -3, -2, -1, -1/2, -1/3, -1/4, 0, 1/4, 1/3, 1/2, 1, 2, 3, 4, 5}, can optimize a b c and d to come within 1% error of your randomly chosen initial number mu. I'm not looking for an explicit answer, I just want to make sure I'm not on a fools errand with what I've done. Basically, I've used four loops nested within each other to keep generating a new product using every value combination possible, then if the error of that value is less than the error of the previous value s then that's the new error and that value becomes the new best value. It's not returning the right, optimized value right now. Any insight? Pic related, how I don't feel right now programming
6 more posts in this thread. [Missing image file: 1353852408030.jpg]
is there scientific research that proves disadvantages of incest? everyone always says the children you could have with females from your direct family have a higher chance of being disabled or something, but i'm curious if it's been proven in some way or is it just so people don't start tiny isolated communities?
3 more posts in this thread. [Missing image file: short-people.jpg]
How many 12 ounce cans of Coke does it take to fill a swimming pool? The pool is 100. m long, 54 m wide, and 2.1 m deep. Report your answer to 2 digits. You will have to use E-notation. 1 ounce=29.6 mL. 1 mL = 1 cm3, 100 cm = m, would this not be (100m x 54m x 2.1m)(100^3cm^3) (1ml) (1oz) (1m^3) (1cm^3) (29.6ml) =3.8e8?
50 more posts in this thread. [Missing image file: Richard_Feynman_Nobel.jpg]
"In this moment, I am euphoric. Not because of some phony God's blessing. But because, I am enlightened by my intelligence." --Richard Feynman Discuss
4 more posts in this thread. [Missing image file: 1323074479577.jpg]
The sticky is a good start, but I really need some help, /sci/. I rarely come here, but I am in some dire need of life changing assistance. I have been out of college for nearly 4 years now. I want to go back, but I feel like I have lost pretty much everything but the basics. I wanted to get into Chemistry or Chem. E, but I was only in college one year beforehand for general education courses. I need to turn things around and stop being retarded. Problem is, I don't know where to start. Can you recommend me some books/textbooks to get someone back on track to college level math/science? I'm begging you for serious advice.
2 more posts in this thread. [Missing image file: meme2.jpg]
this too!!
1 more posts in this thread. [Missing image file: 1358337111083.jpg]
Is there a chance there's some underlying fault in something fundamental, such as FTC, and all the basis we put on this could suddenly have a different perspective after we realise we fucked up on it?
24 more posts in this thread. [Missing image file: abstract_0114-66898.jpg]
What would happen if a sun made of lava and a sun made of ice collided?
12 more posts in this thread. [Missing image file: 6225355_460s_v1.jpg]
How can somebody improve their inteligence, their observation skills, their memory. What is your advice to be as good as lets say our beloved fictional character Sherlock? Pic unrelated.
5 more posts in this thread. [Missing image file: Supermassive_black_hole.jpg]
Hello /sci/ Politely correct me if I'm wrong, but to my understanding, if someone flew around the event horizon of a black hole, time would be distorted. How exactly does this happen?
1 more posts in this thread. [Missing image file: original.jpg]
What are you studying /sci/? I'm currently doing a Physics (Particle) course.

Nanotechnology = pipedream?

4 more posts in this thread. [Missing image file: nanotech (1).jpg]
It seems like throughout my entire life I've been hearing that nanotechnology would change EVERYTHING. It is now blatantly obvious that nanotechnology has very little to no practical uses. Graphene is a new material that is getting almost as much hype as nanotech was getting although the 90s and 00s. Is Graphene just another pipe dream like Nanotech?+
2 more posts in this thread. [Missing image file: 0763774928.jpg]
http://www.jblearning.com/secureInstructorResources/Default.aspx?isbn13=9780763774929 Can any instructors or anyone request this solutions manual for me? I will pay $50.
4 more posts in this thread. [Missing image file: image.jpg]
Good Day, ubermenschen of /sci/ I'm building a CFD solver in C++ and have reached a point where I need to pass a very large matrix to a function for modification. If I require that this matrix not be replicated in memory, which of these do you advise I do: void function(const Matrix &m) {...} OR void function(Matrix *m)
4 more posts in this thread. [Missing image file: image-5[1].jpg]
Why don't lysosomal acid lipases hydrolyse the lysosomal membrane? Isn't the pH also 5-6 around the membrane?
33 more posts in this thread. [Missing image file: 1341155807655.jpg]
Imagine a facility where scientists could go to get unlimited funding. No ethical or moral boundaries. 100% privacy from the outside world. No red tape. No government. No religious leaders breathing down your neck. No 'laws' prohibiting scientists from research. What would the world look like if such a place existed? ....or do you think such a place exists already?
12 more posts in this thread. [Missing image file: io.jpg]
Io gets its internal heat from the friction caused by the gravitational pull between Jupiter and the outer moons. Does this mean that the gravitational pull will become weaker over time? What is "giving" here exactly?
15 more posts in this thread. [Missing image file: cppvideoseries2db.png]
I am about to go into college, and I've never programmed anything other than basic Java. I want to go into Computer Programming. Is this a good idea?

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