Archived threads in /sci/ - Science & Math - 750. page

Feinman on how fuckin magnets work

https://www.youtube.com/watch?v=MO0r930Sn_8

>>8725509
shitpost detected

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>>8725516
>Feynman

>>8725311
Your classmates are retarded and you actually have work ethic. Carry on.

Assuming you have enough time and don't have to "cram", then using spaced repitition is best for memorization.

>>8725324
>>8725325
Thanks. I appreciate the motivation to keep carrying on. I looked at the "solutions" to some of the problems I've missed (first pass) and though "oh yeah thats trivial" then re-did the problem again and would get stuck in a new place, despite finding the answer "trivial" a day or two ago. I reworked one problem 2-3 times until I perfected it and learned something significant each go around. Now I feel very confident I'd be able to figure out problems of those types now on the exam...

I feel like my classmates are simply looking through all 6 exams super fast, and thinking each solution is trivial/they understand it...

I'll ignore their post online and continue taking these exams. I have 4 days. I plan to complete 2 exams tomorrow (Monday) and 2 exams Tuesday. Then use Wednesday to look over everything well....

I'm reading through all my lectures for definitions, ensuring I ~really~ know the definitions well since they are important for our shit.

Anyways, thanks anons. I'll keep chugging on

>>8725279
Yes, but they will slow down with the more atmosphere particles they hit the closer to Earth they get. They won't reach Earth, they'd burn up in the atmosphere.

>>8725302
I'd think that contact with the atmosphere would cancel out the astronaut's horizontal velocity, thus bringing them out of orbit.

>>8725307
Oops, I misread that. I meant to ask if even the slightest push eventually take an object out of orbit. If I were to nudge the ISS would it eventually fall into earth's atmosphere and burn up?

I thought this was pretty interesting stuff
Guess /sci/ isn't worth that much after all

>>8725273
the first video is 18 minutes
you bumped a mere 15 minutes after starting the thread
and /sci/ is a slow board

kys brainlet

>>8725275
So you're saying I should of waited longer, didn't, therefore should kill myself, and may or may not know if anyone understands how this computer works?

>>8724811
All genetic engineering research has implications for human genetic engineering, so we are.

The "ethics" you generally refer to are an interesting and important field of discourse. Learning a little about the ideas there would probably alleviate some of your frustration.

p.s. The Scientific Method is a philosophical framework, desu. Science IS philosophy.

>>8724811
>Why it isn't ethic
holy fuck you're a retard.

>>8724833
Of course we have researched about genetic human engineering but we haven't experiemented on certain fields which I gave exemples of.

Yes, I learned about the ideas about it not being "ethic" and I think they are stupid.

>>8724838
the alt-write has arrived!

there's an x (forward) and h (upwards) component to his jump.
Call the jumping off speeds in those directions v_x and v_h.
His height as a function of time is
H(t) = t · v_h - t^2 · g/2
= t · (v_h - t · g/2)
where g is the gravitation acceleration on earth.
The time value T for which H(T)=0 is the time the guy is in the air:
T = 2·v_h / g
The distance he jumps is
T · v_x
= 2 v_x · v_h / g
This is linear in v_x (so doubling v_x doubles the distance) but quadratic in the total velocity v. If he jumps in the air more aggressively, he has more time and gets further.

If by force you mean air resistance, IIRC it scales v^2 for small velocity and v^3 for large.

>>8724761
>sin x = x = tan x

PHYSICS KEKS OUT OUT OUT OUT OUT OUT OUT REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

>>8724563
No.

>>8724563
you can time travel, but only in future.

>>8725048
beat me to it..

No
Might as well kill yourself now before you get autism, OP

>>8724592
Thanks, I needed that

>>8724549
>he fell for the "you become autistic if you study" meme
hows high-school doin for ya?

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How dare you post this code monkey shit on /sci/? Crawl back to your /g/ and never come back.

in case it wasn't clear, I'm trying to log in through my university to access some papers

>>8724526
it's nothing to do with /g/ actually. it's not my code you mingmong

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>>8724442
Bayes

>>8724528
thanks but the wikipedia page hurts my brain.
> Despite the apparent accuracy of the test, if an individual tests positive, it is more likely that they do not use the drug than that they do

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>>8724442
It's easier to think of if you break the set of all men into subsets, draw like, a Venn diagram or some visual representation and Bayes' theorem will come to you.
[eqn]
P(A|B) = \frac{P(B|A)P(A)}{P(B)}
[/eqn]
P(Married) is the probability a man is married, P(Married|Cancer) is the probability they are married given the fact that they have cancer (the group of men with cancer who are also married).

>>8724386
aliens

Chankillo

>>8724386
Gator-back Bay

>>8724282
none really but chang and kiesler is fine

As opposed to what other logic?

Also, that picture with a highly questionable edge ratio, two fonts and three font sizes,... just no

>>8724282
Godel, Escher, bach

Get a minor in math and major in dat ass

Get a minor in math and major in dat ass

Get a minor in math and major in dat ass

>>8724016
Post proofs.

this is fucking dumb. go play with chicken bones you fucking numerologist.

also post proof

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OP here, Proof:
Volume of sphere:
[math] V_1= \frac{4}{3} \pi r^3 [/math]
Volume of cube:
[math] V_2=a^3 [/math]

Right triangle so that
[math]x^2+x^2=a^2 \Leftrightarrow[/math]
[math]2x^2=a^2 [/math] (1)

We realize that
[math] \displaystyle{ \left( \frac{1}{2}a \right)^2}=x^2 \Leftrightarrow [/math]
[math]\left ( \frac{1}{2}a \right )^2+x^2=r^2\Leftrightarrow
x=\sqrt{r^2-\frac{1}{4}a^2}[/math]

We'll skip the simplification and end up, when we combine the two
[math]a= \frac{2}{\sqrt{3}}r \Leftrightarrow a^3=V_2=\frac{8 \sqrt{3}}{9}[/math]

so

[math]\frac{V_2}{V_1} [/math]
...simplification...
[math]\frac{V_2}{V_1}=\frac{3 \pi}{2 \sqrt{3}} \approx 2,721 [/math]

[math] e \approx 2,718 [/math]

Probably just an alien robot spying fly nothing to be alarmed at you can pet it if you want.

>>8724020

Sure, but why is it white. Are all immature house flies white before they turn black?

>>8724015
It's white thus more intelligent.