Archived threads in /sci/ - Science & Math - 608. page
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>Adderal
Anyone try/use it here?
I love math when I am on it.
>pic unrelated
I too want to know about this; I have been thinking about talking to my doctor about how unfocused and unmotivated I am.
Literally taking a year to complete each level of math at this rate because I keep dropping out of my class. It's not hard its just that I've always been a procrastinator.
Last year my best friend turned into a veggie and I've been unable to continue school. I get anxiety because I know I have HW, studying, a test is coming up but I just sit there not able to do any of it.
tl;dr Please help me with your experiences. Need to...
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>>7674628
You are literally me right now minus the best friend being a veggie.
I don't need adderall for I am not dumb nor am I a cheater. Know your goddamn limitations you fucking average IQ cheaters.
Tell me, why is common core a thing?
http://www.businessinsider.com/why-55515-is-wrong-under-the-common-core-2015-10
Here they say that
>Mathematically, both are correct. But under Common Core, you're supposed to read 5x3 as "five groups of three." So "three groups of five" is wrong.
I think that just saying "It's easier to learn matrixes later on" is not justifying this kind of learning.
>>7674137
I am generally against common core but have no problem with this one. Commutativity is important to learn.
>>7674148
But at least on the first problem there is nothing about commutativity. In this case, the numbers commute so you could do that repeated addition operation in any way you want.
Spoken those two problems say 5 groups of 3 and 4 groups of 6.
I was wondering if there are any drugs out there which would be able to lobotomize someone down to the mental age of a child? The closest I could find was Chlorpromazine
>>7674056
marijuana
>>7674056
Cannabis
>>7674056
devil's lettuce
Is free-will (freedom to choose your actions) real?
yes, you chose to make this dumb thread.
>>7673914
https://www.youtube.com/watch?v=vBrSdlOhIx4
That's not a coherent question. Come back when you learn to speak english.
i just realized that love is probably one of the reasons our brains evolved so much
discuss
>>7673907
please elaborate.
>>7673907
Fuck off with your bullshit. Love wasn't necessary to avoid lions and tigers on the plains of Africa. Anything beyond a rudimentary animal-like kinship came much later after early humans had started living in small roaming bands.
>>7673907
True. The skull size of a human infant at birth + living conditions meant that death in childbirth was almost a guarantee for any woman up until ~100 years ago. Essentially, we only want to reproduce with people we're willing to die for.
>men have feelings too
>probably
I need some help with a physics question I can't seem to figure out. The question is: Two trailers, A and B, is beeing held by a rope. They stand still. The mass of A is 1 kg and the mass of B is 3 kg. A spring is in between the two trailers. The rope is then cut, and the trailers move in a straight line away from each other with almost no friction. Trailer A have gotten a speed of 1.2 m/s. How much energy is stored in the spring when its given that 60% of the energy goes over to kinetic energy to the trailers.
And I am sorry for my terrible translation.
Initial momentum is equal to zero, so is the final momentum. For the energy part use 1/2mv^2
>>7673628
My native language isn't english, please tell me what you mean about initial and final momentum :P And if I am correct you refer to P=m'*v?
If so, I can't see how P=mass f
Cant figure out this related rates question.
A plane flying horizontally at an altitude of 1 mi and a speed of 480 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 5 mi away from the station.
use real units faggot
Those are freedom units.
Draw a diagram. It will be a triangle, with the radar station at one corner, the plane along the hypotenuse h, the y distance 1 mi, and the x distance being the distance along the ground. dx/dt = 480 mi/h. dh/dt is the quantity you seek. Use trig.
Dumb question:
In special relativity, if you have a traveler moving at a velocity v and an observer at rest, can you treat it as the traveler at rest and the observer at moving at velocity -v? In the first case, the traveler would measure proper time, but in the second case the observer would measure proper time?
Thanks
>>7673523
Yes, but keep in mind that since they are both in inertial frames, they will BOTH measure proper time in BOTH cases. They will both see time passing slower for the other person compared to their own time- the proper time for themselves is evaluated with v = 0, so the integral is just coordinate time, whereas the other person will have a nonzero v and thus a lesser proper time.
>>7673523
OPs pic gives missing info. The earth moves around the sun, as the sun moves around the milkyway as it rotates around the center of the universe.
So even a tiny millisecond jump in a time machine would displace you the fuck away from earth
>>7673523
There is no "proper time" all observers will measure their time to be proper from their point of view.
ln(x) + 2^x = 3
is there any way to calculate this with pen and a paper or do you have to use a computer to approximate it?
>>7673521
That's a function, you don't have to calculate anything.
>>7673529
But there's only one variable.
>>7673529
>That's a function
No, this is an equation. It is only valid for one value of x.
My girlfriend does biology at university and we were discussing if a parasite could ever take control of a human as its host the same way it does insects, would this ever be possible?
No.
Well Toxoplasma Gondii makes rats go suicidal, so it's not far off to think something like that could influence human behaviour too, maybe not 100% though. I think I heard some stories about how funghi might be the cause of some forms of schizophrenia.
Hey /sci/ i was helping my little brother when he asked me to solve a question that i couldnt solve. Wondering how you can solve it. Question 20 in pic related
>sideways pic
>comic sans
this is clearly just bait. kill yourself. sage.
>>7673307
Heres a rotated pic. And what his retarded teacher uses as a font isnt my problem
use the pythagorean identities
![latest[1].png](https://i.imgur.com/ab6BsoD.png "latest[1].png")
Is it possible to make a directed electricity weapon that will shoot lightning to the aimed direction ? Can a lazer beam create negatively charged particles in the air that the lightning source will approximately follow and spread around in the general direction ?
yes and no
>>7673199
We can generate lightning, or something close to it, but you couldn't carry it around like that.
If the target is conductive and its the closest path to ground....
Yes.
Hey, /sci/. I'm a pretty stereotypical fa/tg/uy. I know very little of astrophysics, biology, and meteorology. But I have a hypothetical scenario I want to explore that requires advanced knowledge of these subjects, so I'm asking you.
Given an 'earth-like' planet with the following traits, how would native plant life and weather differ from what we are used to here on earth?
>Earth like planet (nitrogen-oxygen atmosphere), slightly colder (cooler star but still yellow). One moon. One large ice-ring in orbit. 33 hour rotational...
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more like fa/gg/ot
>>7673119
Put down the krispy kremes and go for a fucking jog fatty
>>7673156
It's..... no, see, fa/tg/uy is the nickname that anons on 4chan.org/tg/ chose for ourselves. We're the 'traditional games' board. We talk about any games that aren't video games, or are videogames but that /v/ is too young and stupid to appreciate (old sierra games, text adventures, etc). Mostly, /tg talks about Warhammer40k and Dungeons and Dragons. The whole 'fa/tg/uy' thing is a self-depricating meta-joke mocking the stereotype of our kind of gamer being obese neckbeards. I'm...
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Can someone explain to me why a set being closed does not imply that it is not open, and vise versa?
I bought a 500 page book called "Set Theory and Logic" and there is NOTHING in it about set closure. Recommending resources to find stuff also appreciated.
>>7673024
Because limit points are not the same thing as boundary points.
>>7673024
This is a topological notion, not something you'd see in a set theory book.
Closed is not defined to mean "not open". A set in a given topology T on a set X is closed if it's complement in a given topology is open. The fact that a set can be both open and closed is trivial since the X and the empty set both must be open sets by definition of a topology, and so since they are eachother's complement, they're also both closed.
>>7673024
Topologically speaking, the definition of closed is that its compliment is open. That means any set with an open compliment is closed. So if you have an open set, if its compliment is open then it is also closed. If you have a set that is not open, and its compliment is not open, then it is neither open nor closed. The problem with "open" and "closed" is that they imply mutual exclusivity, when in reality they're two different qualifications.
Hi /sci/,
Can you imagine an algorithm that can calculate the status of every major debate, based on rational principles that boil down to the current STRUCTURE of each debate? This algorithm is being developed and put to use in wikidialectics.org, and I think it's a great idea, but it will only become serious when a debate grows big enough. Do you think the system makes sense? Is it worth pursuing?
The current system is this:
Every debate has its own page, and the title of the page is the issue being debated written as a yes/no question. For example, Should suicide be legal? or Does God exist? The software calculates the current answer to the question based on the following algorithm:
- YES: At least one sustained argument for, and no sustained arguments against.
- NO: At least one sustained argument against, and no sustained arguments for.
- MAYBE: Neither YES nor NO.
By editing a page, it's possible to add arguments for and against, and...
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This is a bit like http://www.riyarchy.com/, but more flexible and with the whole "calculate the conclusion" feature.
>>7672995
So it doesn't evaluate the quality of the arguments, only whether or not there is an argument? Are many weak arguments favored over a single strong argument? Is personal experience weighted as heavily as statistically significant data? Lastly, can someone object to an objection? If so, would it start a new debate?
