Archived threads in /sci/ - Science & Math - 1444. page

>>8288215
>I don't know shit about fishing. I wonder if I can get a job in fishing. Can you catch fish by fishing?

How about trying something you like doing and already know a bit about?

>>8288223
ok can i major in quantum physics

>>8288225
No and this board shouldn't be visited by under18s.

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Any rotation is a double reflection in a pair of vectors, as illustrated in Figure 7-2 on the right. In this figure, the red vector x is reflected first in the blue vector a, and then in the blue vector b. The result is that x is rotated over an angle φ, which is twice the angle between a and b.

In geometric algebra, you can use a unit vector a as a reflection operator by employing it in a sandwiching product: ax/a reflects the vector x in the line of a.

It then follows from the figure that the geometric product of two unit vectors R = b a fully encodes the rotation as a double reflection. R is called a rotor, and it is a regular element of the real algebra. The rotation of any object O by the rotor R is performed the same way as quaternions: RO/R. Quaternions are just one special case of rotors, i.e., quaternions are rotors for a 3-D Euclidean space. The i, j, k coordinates of a quaternion are just the coordinates of the bivector part of the rotor, which encodes the rotation plane (drawn as the yellow disc in the figure on the right). In geometric algebra, the square of a real unit plane like i happens to be -1, and that is why rotors and quaternions remind us of complex numbers. Emphasizing this relationship to complex numbers (as quaternion treatments typically do) makes them needlessly hard to understand and visualize.

>>8288186
as much as i think GA is better, your explanation of "being needlessly hard" is what's ironic

>>8288195
>being needlessly hard

Where was this explanation?

>>8288118
Gamma radiation falls into black hole #2, increasing its mass ever so slightly.

No. The black hole in the universe with radiation would be more massive. It would have captured photons and grown while the solitary black hole would lose mass to Hawking radiation.

>>8288118
Black holes, according to their current formulation in general relativity, have exactly three properties: mass, angular momentum (how fast they're spinning), and electrical charge. They have no other discernible properties, according to the No-Hair Theorem.

So under current models of black holes, the latter would be exactly the same in all but one aspect, with the only difference being a higher mass from the additional photons absorbed.

>>8288098
You mean "Protonics"?

http://www.decodedscience.org/proton-based-circuitry-may-revolutionize-electronics/3579

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>>8288104
thanks, didn't know they already made some prototypes.

here's the nature article if anyone else wants to read it:

http://sci-hub.cc/10.1038/ncomms1489

By the way, are the flagella motors in protozoa similar to bacterial flagella? (do they work in a similar way?)

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posting more cute biomachines

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>>8288049
>get computer
>glue it to yourself
>tfw you are now a cyborg that can do calculations as fast as a computer

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Computers have no emotional intelligence, so I'm the genius of the two of us.

>>8288049
>tfw when humans don't need human input to do computations
>tfw when I can't feel because I'm a robot
0110001101101111011000110110101101110011

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>>8288004

Circle within a circle

>>8288014
>untittled
Humor appreciated but please do see if you know of some papers relating to the subject.

>thinner walls maintain proper beer temperature longer
its not only bullshit its comically retarded

It's obviously bullshit, but how did they manage to get away with trying to ruin the beer by removing all the CO2.

>>8287990
By adding nitrogen. N2 doesn't acidify the beer like CO2 does, which means a different flavor in the beer.

lay off the crack

>>8287938
nah youre right tho. maybe they have it (the camera) there just in case but (space program) doesn't want to say that, and turns out there is life on Jupiter and everyone finds out maybe ?

building a camera that will survive extended journeys in space is quite difficult and will be heavier than you think. most of the satellites have better things they can use that mass for than a simple light camera

>>8287931
aw man what a dork that HAS to be bait

>>8287931
I've youve never taken it before take like 2-3mg at first and then if youe not high enough take 2mg more. Don't drink alcohol.

>>8287931
if you wanna forget everything and pass out take 4mg

fat smelly white boys and asians, feminists and no research funding

Expect to feel stupid compared to the guy who can't talk to girls and doesn't shower every day.

>>8287913
Its worse to feel stupid compared to that one guy who doesnt try, wrecks everything, and has a healthy social life as well. Every department has one.

>>8287868

what website?

>>8287874
khan i guess

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>>8287868
I struggle with this too, fuck inequalities especially. Slow down and double check, writing everything down no matter how simple helps me a lot. I was going through alg 1 just 2 months ago and today I reached pic related.

>>8287860
https://en.wikipedia.org/wiki/Quasar

We do see something like an 'explosion', but an object getting pulled in would simple be pulled in. Gas and dust clouds can be mostly pulled in while allowing some material to be ejected.

>>8287860
tfw kurisu is a biofag

>>8288016
but still does GTR and shit

Change in volume

>>8287864
Thank you

>>8287864
Really?! Why the fuck did you help him? People like you are making /sci/ a shithole infested with high school homework problem threads! :^)

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marijuana or shrooms

thank me later

Use those information.

>>8287821
You have reached your full capacity. You can no longer learn anything more complex.

The only thing you can do is come to terms with the fact that you are a brainlet.

>>8287756
shut the fuck up

>>8287776
this desu baka

>>8287756
The word "irrational number" is just a symbol to... represent the set of irrational numbers (generally).
Because it is a symbol it by definition is not the thing it represents.
You are using English.
I can use the n looking Pi symbol.
Another person may attempt to write down each and every digit of pi..............
Either way they are just symbols to represent an idea. An idea that itself is ALSO a symbol that represents different parts of reality.
You are using a symbol to represent a symbol of reality. The idea is very real. However the idea does not perfectly represent the real world because if it did then it would by definition be the real world. Pi would not be pi.