/sci/ - Science & Math

say ive got an operator A that is a 2x2 matrix with eigenvalues 1 and -1 and some wave function psi. does the expectation value of <A>=1 or -1 or can it equal something else

i was pretty sure i saw somewhere that it has to be an eigenvalue but cant find it anywhere and an answer i got to a question was between -1 and 1. also googling that shit is not easy

>>6290675
>Step 1. Build space elevator
>Step 2. Put significant quantities of water in space
>Step 3. Don't store it or use it for keeping things suitable for life
>Step 4. Throw it back at the planet, hope to harvest the energy that the atmosphere doesn't bleed off

>>6162861
Gravity is expected, by the definition and formalisms associated with General Relativity, to travel as a wave at the speed of light.

http://en.wikipedia.org/wiki/Gravitational_wave

Although we have not come up with an apparatus sensitive enough to conclusively prove their existence directly, the phenomenon of gravity waves is generally seen (among physicists) as just as factual as GR itself.

dickwaving to the left, dickwaving to the right

Thanks for the laugh sci.

>>4113063

>>3922190
TAKE INTRO CHEM FROM DR. LAUDE YOU DISRESPECTFUL WHORE.

(Bio you can skip; intro Bio is retarded; Finklea's Genetics is the one you want)

>>2588238
>>2588237
>>2588235
>>2588234


hive mind

>homosexuality, not genetic

>shows that homosexual behavior has been observed in close to 1,500 species

http://en.wikipedia.org/wiki/Homosexual_behavior_in_animals

Problem GodFags?

>>2268606

you bastard, youre not planning on blowing up the moon are you?!

mfw /sci/ has like 8 active posters and /sp/ has hundreds


also mfw two people participated in this thread

>>1716818

just had to bring god into this didnt you, you sick fuck

>>1558957

Hey /sci/ I've figured out how to combat the trolls, everyone just say that they're a christian, it's simple, anytime one of these threads come up just spout some jesus shit and if trolls see no atheist comments they might think "well fuck, this boards dried out" and they'll move on.
SO COME ON TOGETHER WE CAN DO IT /SCI/

>>1469167

>>1296436

My problem is fail trolls

>>1078527
Some of us weren't meant to grow full beards.
Shave that patchy embarrassment off your face.

Also, LEAST /sci/ POST EVER.
Go to >>>/fa/

>>981584
...Except, ya know, the exact opposite is true:

http://www.springerlink.com/content/ca5neuylg4dq8u88/

(read the last few lines of the abstract)