/sci/ - Science & Math

im a teaching assistant on an introduction to module theory class, what are some good easy examples for my students? pref on non commutative rings

>>8648568

Working on practice exams for a diffy exam I have, and something came up that has me a little bothered.

"For what range of b will the solution to the differential equation oscillate indefinitely?

y'' - by' +(2b - 3)y = 0

I was under the impression that since this is a damped system, it would never oscillate indefinitely, but solutions list it as the range from 2 to 6. (IE, the range of which underdamped motion)

Do I not have this correct? Or is something botched? If it's underdamped motion, shouldn't it just gradually decrease to zero?

>mfw when people thinking intelligence isn't at least partly genetic
>mfw identical twin studies have proven this and more
>mfw no one cares about the Minnesota Twin Family Study b-becuz its r-raycist to a-assume people got different things becuz different genes!

>>5846487
Quick question, why is dark matter "dark", and why doesnt light interact with it?

I understand that it is heavier than regular matter. Is it possible that do to its extra mass that it bends light so it goes around it?

I'm not knowledgeable on this stuff, but I just thought I'd ask out of curiosity.

>A force in the -direction with magnitude F(x) = 18N-(0.53N/m)x is applied to a 7.40kg box that is sitting on the horizontal, frictionless surface of a frozen lake. F(x) is the only horizontal force on the box.

>If the box is initially at rest as x=0, what is its speed after it has traveled 17m?

I'm using the equations a = F/m = (18 - 0.53x)/7.4 and a = (mv^2)/2
V(f)^2 = V(0)^2 + 2a(dx) = 0 + 2a(17)

So I get v = 6.43 m/s, but apparently it's wrong.
Can you guys help me out?

Heterozygus.

>400 something posts in 20 minutes
i had no idea this many people where on /sci/

>>4937149
>http://www.youtube.com/watch?v=L0bcRCCg01I
>>4937085
>mfw the movement is almost exactly 7 minutes long

>>3800894
If you don't act like a nigger you aren't a nigger. You're black, so some people will hate you, others will give you shit for nothing and a few people won't treat you any different. Hang with people who judge you on your actions rather than your pigmentation and you should be fine.

And as far as nature/nurture, you can't do a thing about either so who gives a shit? Unfortunately this argument could also be used to defend racism upto a point, but eh.

>mfw I did this went through this when i was little.
>now im trying to be an atheist and have night terrors because of the indoctrination and guilt.

>>3252064
ASPIE AS FUCK

>mathcad

>implying

>>2342566
Is that... you?

>>1987568