Can someone explain the point of "conservation"?
Throughout history, several species have gone extinct. You either adapt to your environment/learn to avoid your predators, or go extinct. That's how nature works.
Humans are the dominant species on the planet, and the species that are thriving are the ones that have adapted and learned to co-exist with humans, or use humans to their advantage (such as crows dropping nuts on roads and using cars to crack them so it can eat them). That is evolution at work. If a species can't adapt, then it's supposed to go extinct.
>>7946419
>supposed
when you got as much power over the environment as humans do, you can take the liberty to keep things alive.
why though? well, some animals are cute I guess. and they're nice to study for people who study biology and ecology and shit. keep the earth ecology interesting and rich, you know?
but yeah, if it has to happen, it's going to happen
>>7946429
>>7946419
This is stupid. But I guess if you only ever learned STEM your entire life its reasonable to think.
When you take almost any animal out of the food chain it has rippling effects throughout the entire ecosystem. Take yellowstone and its re introduction of wolves. The wolves brought the number of grazing animals to a balance, and also forced those animals to adapt by constantly moving or not grazing where they dont feel safe. As a result certain vegetation can flourish along riversides that prevent erosion and provide shelter and breeding grounds for amphibians and fish. Theres more too it than that, its only a small peice of the chain that weve seen affected.
>>7946419
you are a retard, human are part of the environment, being cute is an evolutionary trait that permitted panda to survive, it's a good strategy as any other.
Well?
>>7946401
First two.
>>7946401
A to make sure the other side is an even #.
7 to make sure the other side is not a vowel.
D to make sure the other side is not an even #.
4 to make sure the other side is a vowel.
You have to turn over all of them. No way around it.
>>7946404
How does that tell you D doesn't have 2 on the other side and 4 doesn't have F?
So Vi Hart and the internet at large told me that Pi is evil blue-pilled shit that makes everything difficult and bad, so everyone should use Tau which is Pi*2, because it makes learning higher math so much easier.
Is there a KhanAcademy alternative or some math textbook that teaches with Tau?
>pic not fuckin' related but came up as image search for "Tau"
The impact that switching between Pi and Tau has on pedagogy is totally negligible. You could better spend your time on anything else, basically.
>>7946099
Pi vs. Tau is a pointless semantic quibble.
>hurr everything is so much harder if you divide this constant by two
Even if you subscribe to tau being better, at best it helps you develop your low-level intuition a bit faster. Nothing non-trivial changes.
>red-pilled mathematic
>tau extremist
>gas the pi's
/sci/ was a mistake
what is the best way to maximize the IQ of your children, looking at both genetics and environment?
Drill them on IQ tests
>>7946080
/thread
Good education and a stable household are probably the most important things. Education for the mental skills; the household for the psychology. Those things take money though. I've never heard of a prominent intellectual who grew up poor.
What would happen if a person were to increase their levels of testosterone AND estrogen to an equally high level?
>inb4 gender change
I mean increase both at the same time.
prolly fuk up ur liver lol :3
>>7946030
that happens more or less normally, the body produces more androgens in response to estrogen and vice versa, see gynomastia on men using steroids.
Look at the wikipedia articles on m-f and f-m hormone replacement and compile all the side effects.
It seems like everyone on this board is so fucking smart. I'm going to start college this fall and I'm planning on going into CS.
How much stuff from high school actually helped you guys in college?...
>>7945925
I started as CS. I couldn't stand the people in my classes, and the emphasis on teamwork.
Now I study a normiefield, with a math minor.
>>7945929
forgot to add,
the only thing acedemic from highschool that will help you is the mathematics
>>7945925
If you can read write and do math and have a decent memory, you can learn anything, you just have to believe in yourself
>barely understand anything in lectures
>go home and study by myself
>do well on exams
Anyone know this feel? I don't even fucking know why I bother going.
>>7945924
Lectures are pointless.
>>7945924
Same here m8. Am taking Diff Eq and Cal 3, both are easy as shit. Don't even go to lecture anymore.
>>7945924
I do, but my problem is I space out during lecture. Instead what I do is just copy down everything on the blackboard and read through my notes later. Depending on the Prof this works. Lately though I just skip class, study out of books, and then show up for quizzes and tests.
Drawbacks to the first method are that
1) time spent copying stuff in lecture could instead be used on studying
2) some professors spend most of their time talking math and arguments at you and only write down bits and pieces (i.e. the notes are unintelligible so copying them is a waste of time).
Drawbacks to the second method are
1) Sometimes profs will add in extra material in class that will show up on exams and homework but not in any assigned textbook, reference, and at times not even in the course outline. So skipping class leaves a major risk of being blindsided by something you couldn't have known to study otherwise.
2) Sometimes profs will list a textbook (or many) but won't actually be following any of them.
Having a good friend in class just to tell you where the class is at can save you when skipping class and studying on your own.
Is it true that all arguments against perpetual motion are of philosophical nature and from a scientific point of view there is no reason why it would be impossible?
>>7945811
Quite the opposite. The arguments against perpetual motion are scientific and for are purely philosophical.
>>7945811
You can create perpetual motion, but only on the margins and scraps. Only on the waste heat and flaws of other sources of power may you find the infinite and glorious realization of not only a powerhouse but the power source of your own self and that final godhead.
You are mistaken to think that only the prime power production can provide you the true hertz to operate your finial form but it is a path that will only lead to short-circuits and blown fuses through your life.
The righteous path toward illumination is a three-phase source only obtainable by those willing to seek it.
>>7945815
If the universe ended tomorrow then that pendulum you have swinging in your clock would count as perpetual motion because it lasted "forever" because "ever" ends when the universe does. Therefore if the big crunch or rip is real then any celestial motion that lasts up to that point is effectively perpetual. Checkmate scientists.
Okay so I did some research into magnets, specifically into the magnetic field generated by a wire. I've been taught that the moving current causes relative compression of the moving charges due to special relativity.
Then why do the magnetic field lines go circular around the wire rather than straight in to the wire?
>>7945686
They form at 90 degrees to the direction of flow (the wire)
The magnetic field can be thought of in terms of the relative change in the electric field due to the motion of electrons. The reason you get these closed loops is because whenever the strength of the E field increases when an electron flows towards it, there's a relative decrease in the E field from where it's flowing away from. When you have a wire with a continuous current flowing around it, the net strength of the E field at any point isn't going to change because whenever an electron moves out of a spot there's another to replace it, but the flow makes almost like a vortex if that makes sense? This isn't a rigorous description in the least but it was a useful conception for me when I was taking upper div E&M.
What the fuck is in the Gardasil vaccine?
>>7945599
stuff to vaccinate you for the human papilloma virus.
My guess would be Human Papillomavirus Vaccine [Types 6, 11, 16, 18] [Recombinant, adsorbed] but that's just a shot in the dark.
In a lot of anti-virus vaccines and the Gardasil vaccine, it's simply the capsid of the virus (or several common strains of one virus) -- which is the protein coating of the virus. This "teaches" your adaptive immune system to recognize the virus. Then they package it with a matrix of some kind and maybe some proteins to help absorption.
The great mystery of humanity is gravity, I always wondered why only the earth pulls objects, why does everything just floats on mar's or moon's surface? Are we the center of the universe?
>>7945543
>I always wondered why only the earth pulls objects
Joking?
All mass has gravity associated with it. Earth, the moon and even you.
Age?
>>7945543
your mom
Here's the thing. You said a "jackdaw is a crow."
Is it in the same family? Yes. No one's arguing that.
As someone who is a scientist who studies crows, I am telling you, specifically, in science, no one calls jackdaws crows. If you want to be "specific" like you said, then you shouldn't either. They're not the same thing.
If you're saying "crow family" you're referring to the taxonomic grouping of Corvidae, which includes things from nutcrackers to blue jays to ravens.
So your reasoning for calling a jackdaw a crow is because random people "call the black ones crows?" Let's get grackles and blackbirds in there, then, too.
Also, calling someone a human or an ape? It's not one or the other, that's not how taxonomy works. They're both. A jackdaw is a jackdaw and a member of the crow family. But that's not what you said. You said a jackdaw is a crow, which is not true unless you're okay with calling all members of the crow family crows, which means you'd call blue jays, ravens, and other birds crows, too. Which you said you don't.
It's okay to just admit you're wrong, you know?
>>7945379
Who are you even talking to?
>>7945379
What the fuck are you rambling on about?
Who cares?
nigga, jackdaws aren't just in the same family as other crows; they're in the same GENUS (Corvus). now, they've got their own subgenus (Coloeus), do seem to have diverged from other crows fairly early, and some people have suggested giving Coloeus its own genus, but declaring that they're not crows is just a bunch of self-important wankery.
Speaking as a scientist who studies trilobites, I can tell you that the Agnostida diverged from other trilobites fairly basally and that some have suggested that they be given their own grouping outside Trilobita. But I'm not going to go on a Vietnamese tax-accounting imageboard and start blathering about how AGNOSTIDS AREN'T TRILOBITES YOU GUISE
no1curr
Hi, somebody knows a nice book about probability and statistics?
Thanks,
if you look up probability and statistics on amazon you can find a bunch of book on the subject and they even have a comment section where people can write if ithey think it's a good book or not.
Bumping because interedted as well
>>7945301
Don't ever fucking reply to my posts again unless you have something to contribute to this thread
Paper - http://qualifications.pearson.com/content/dam/pdf/Advanced%20Extension%20Award/Mathematics/2013/Exam%20materials/Question-paper-Paper-1-June-2014.pdf
What's the matter? It's just the binomial theorem.
As aforementioned, just using the binomial theorem
>>7944900
This could be expressed so much more easily with factorials
I have an equation for finding a value of x in terms of theta.
That's fine. But now I have some value x and need to find theta. Algebra looked tricky so I stuck it into Wolfram.
I don't understand why Wolfram has included a new 'n' term and what I should be doing with it.
>>7944779
I remember seeing n*pi being substituted in some differential equation solutions but I don't know if it's the same thing.
Regardless, what am I meant to do with the 'n' in my new equation for theta? Just set it to 1?
n just allows it to be periodic, so long as n is an integer.
>>7944779
http://www.wolframalpha.com/input/?i=rearrange+x+%3D+r{[cos%28theta%29+%2B+q]+-+[%281%2F2q%29*sin%28theta%29^2]}+in+terms+of+theta