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/sci/ Science & Math

Threads added between 2014/12/24 and 2014/12/31

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Most viewed threads in this category

1 more posts in this thread. [Missing image file: ]
http://en.wikipedia.org/wiki/Project_Orion_%28nuclear_propulsion%29 We've had technology such as this since the 70's which allows us to reach Alpha Centaurai in 133 years, and much faster under certain conditions. If we were really under threat from planetwide extinction, what could humanity do to ensure humans survive with todays technology? If nations were really dedicated to exploring space just how possible would it be to reach and colonize other planets?

Can you help me solve this?

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Multiple Choices

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A teacher administers a multiple choice quiz. Each question has N answers. If a student chooses the (only) correct answer, they will receive 1 point. The teacher adds that if the student circles multiple answers, they will receive partial credit based on how many they circled (only if the correct answer is circled). If a student were to circle N (all of the answers), he would receive 0 points. What relationship exists between the number of answers circled, and the fraction of points the professor should fairly give?
18 more posts in this thread. [Missing image file: ]
>mfw I learned the Latin name for lead is plumbum
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What are /sci/'s thoughts on De Broglie-Bohm theory?

People believe this

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I've seen this shared on my facebook 4 times, each with 5-10 comments. None of which saying it's fake. Why dey so stoopid?
21 more posts in this thread. [Missing image file: ]
Every decision you will ever make has already been made. True or false?
16 more posts in this thread. [Missing image file: ]
What is a tensor? how is it different from vectors and matrices ?
10 more posts in this thread. [Missing image file: ]
>wave-function collapse Is it possible that what is not being observed does not need to be rationalized and be needed to follow the laws of the universe? If something is not being observed, it simply does as it likes. But as soon as it becomes observed, it is abided to the laws we have set forth. It is coded to become what we need it to become to allow us to understand what is happening. Anything not observed simply does not. And there is a reason for this. Do you want to know more?
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how to get women using science, dr./sci/?
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how do I get rid of the logarithm in this equation? or even better; what's the best way to solve this? oh and merry christmas /sci/

reasoning

6 more posts in this thread. [Missing image file: ]
what is your individual rational reasoning behind staying alive rather than not? surely most of us have had our existential crisis years and decades ago, but why do we still keep making constant effort in order to live?
0 more posts in this thread. [Missing image file: ]
Solve a^x + b^x = c where a,b,c are positive real numbers. So clearly you can rewrite this as exponentials exp(A*x) + exp(B*x) = c where A = log(a). I pushed it into a closed form with the Lambert-W function, but that only works if you assume a certain combination of variables is small.
6 more posts in this thread. [Missing image file: ]
Hey /sci/, I'm taking real analysis right now and something doesn't make sense. >Every point in the cantor set is disconnected from every other point >The Cantor Set contains no isolated points How do these properties not contradict each other? How can every point be separated from each other....but none of them are isolated from each other? It's basically saying that the points are never in the same neighbourhood....but the point never have their own neighbourhood. Analysis doesn't seem consistent.

What happens after we die?

16 more posts in this thread. [Missing image file: ]
Death is an illusion and here's how. Time doesn't work the way people think it does. The universe is a 4 dimension site in which nothing is moving or changing. If you were moving in a car, you wouldn't doubt the houses behind you would be there. Our consciousness is moving one way through time but physics tells us the movements are still there. When we die, there nowhere for conscious to go except back to the beginning.We have our lives over and over again."
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Big (stupid) question of the day: What would happen to the degenerate matter of a neutron star if it was moved to a location with significantly less (let's say 9.80m/s^2) gravity? Would it revert to normal matter and expand rapidly? Or would it need a separate "push" to overcome the equilibrium state that it inhabits while in the neutron star?
8 more posts in this thread. [Missing image file: ]
Guys, can you take care of my circles for awhile? Just don't disturb them.
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Why isn't it widely accepted that the universe always been non-empty ? Assume a physics fully able to describe the universe exists Then it's possible to link every effect with a cause otherwise we couldn't describe that effect Assume a empty universe Assume somethings come out of this empty universe Then the first effect could be linked with a cause which can't exist since it would be in the empty universe Then something coming out of a empty universe is a contradiction Then the universe has never been empty Conclusion: Either a physics fully able to describe the universe doesn't exist, either the universe has allways existed

Math

9 more posts in this thread. [Missing image file: ]
Hi there I need some help with my assignment. it says factorize 3x(x+1)+2(x+1). isn't it is factorized already? Thank you!!!!!!
21 more posts in this thread. [Missing image file: ]
What can I do over this break to better prepare myself for getting a research position and/or for grad school? Currently sophomore Physics major and besides academics I don't have much by way to make myself "marketable". I taught myself Java from this website: programmingbydoing.com and took an Intro to CS course on campus (which was taught in Java and I had no problem with) and have extremely minimal C++ experience. Should I learn C++? Matlab, Mathematica? Python? Away from coding is there anything else I could do as well--maybe some textbooks I could look over or areas to self-teach in? tl;dr what can I do over break to help myself out especially in the area of acquiring research or making myself look good






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