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/sci/ Science & Math

Threads added between 2014/01/23 10:00 and 2014/01/23 16:00

78 more posts in this thread. [Missing image file: Veil descends.jpg]
How do you live with knowing that not nearly enough is being done to stop our downward environmental spiral?
3 more posts in this thread. [Missing image file: WP_20140123_001[1].jpg]
I have an interesting conundrum, /sci/. Today, at uni, we were supposed to prove this statement. I laid out my proof exactly like this, and just before the end of the class, the prof told me it was incorrect, so he had no time to elaborate on what was wrong. Can any /sci/entist figure this out?
7 more posts in this thread. [Missing image file: kill_yourself.jpg]
What is the intuition behind \Prod_{n=1}^N\ (1+1/n) = 1+N ?
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I just realised. HFA/Asperges snuggly fits as a combination of OCD, ADHD and pathological narcissism/aspd. Looks like another fake psychiatric criteria will go down the drain thanks to brain imaging.
6 more posts in this thread. [Missing image file: dynamics.png]
/sci/ I'm sure you have seen problems that look like this in the past, as have I. However there is a difference in this one that I can't seem to explain. Right off the bat we have a stick with mass m and length l that is placed at an angle a at some starting point. There is no friction between the stick and the wall. At the starting moment the stick is stationary however due to no friction it will surely slide. Now the question is what the force of the stick on either wall is as a function of the angle a. Now, at first glance this seemed like something I should be able to solve however I am having some difficulty. One thing I can't seem to understand that I think is key is how this example would differ if there was no wall on the left, since there is no friction I would assume it wouldn't make any difference however I have a feeling that the center of mass would not move horizontally in the case of no wall. Does anyone have any ideas on how to approach this?
2 more posts in this thread. [Missing image file: image.jpg]
I know this is 5th grade math but I need help for my test/project. I need a 2nd grade graph function that intersect with x at -.99 and .99 and with y at -2.43.

A career in scientific research

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Is it worth it, or is it too risky?
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Why has humanity never created cobalt bombs on any scale other than experimental / prototype stages? They are the ultimate weapons, period. They make thermonuclear bombs look like child's play in comparison. I'm not even joking when I say that cobalt bombs or "salted nukes" are doomsday devices, if you were to set off enough of them it would destroy all complex cellular life on the planet within the span of 24 hours. ALL complex cellular life. On the entire planet. 24 hours. The invention of the nuclear bomb and the cold war's stockpiling of enough to send humanity back to the stone age shows us that we're blatantly suicidal, so why has humanity never went the entire way? Why have we never taken the logical conclusion and just created the world's most efficient "destroy earth" weapon, when it's been within our means to do so since the 1960's? In for a penny in for a pound, I say. Why stop at thermonuclear bombs? You've gotten that far, why not take one last step further?
1 more posts in this thread. [Missing image file: 1368918740741.jpg]
What are the most common research methods? The only methods i know of are empirical studies and grounded theory.
1 more posts in this thread. [Missing image file: ro_neutron.jpg]
Hey /sci/, A few weeks ago one of my docents in solid-state physics mentioned a video showing the result of neutron spectroscopy used on a running engine. I think he said something about a nuclear reactor being used to produce the neutrons. Being as curious as unable to find said video: Does anyone know the video or similar videos? Our docent was unable to tell us the source.
0 more posts in this thread. [Missing image file: 1390246106728.gif]
Hey /sci/ i will soon be studying math D and i wanna know which place is the best to learn it on and could you provide a newfag some tips? also i will be studying math B since i failed it but managed to get C done.
3 more posts in this thread. [Missing image file: 1366019500211.gif]
What is the relationship between the molar mass of alkanols and the molar heat of combustion. How can this trend be explained by the structure and bonding of the alkanol, and how is this significant in regards to the use of the said alkanol as fuel?

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