Archived threads in /sci/ - Science & Math - 224. page
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Anyone ever taken this class? I have an interest in Paleontology and hunt for fossils on the weekend. I'm an Accounting major and I have to take a course over the summer to fulfill a free elective.
I don't think Biology is very hard at all, and I'm a bio major. Unlike other sciences that tend to "build" off one-another, biology is more or less like moving to the side, for most undergrad stuff at least. Taking other bio classes makes it easier, but just getting in is by no means very hard at all if you pay attention.
>>7996607
I would say that as a rule of thumb; the more classical the subject sounds the easier it is for starters, like botany or zoology.
I've known engineers and other non-science students that don't know that DNA translates in triplets or what an aminoacid is or its structure(or at least the usual position a certain aminoacid takes in a protein) which depending on the teacher/matter can give you bigger problems or not.
>>7996591
What does Biology I contain in your uni? Is this an American term?
>>7996607
Depends on the bio degree I guess. Some degrees are more focused on mol. bio, some others on zoology or botany; in some degrees you can specialise and build off of previous knowledge. The thing with bio is that it spans many more subjects than other sciences and bio degrees attempt to help you scratch the surface of each topic.
>>7996641
this...
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>take upper division physics class
>first 10 weeks we have homework and maybe a few quizzes and maybe a test so they can give a midterm grade
>last 6 weeks of the semester they try to jam 3 more exams before finals
WHY DO THEY DO THIS
EVERY. SINGLE. TIME.
What's wrong with having a test in the first 4 weeks of the semester?
>>7995720
what's wrong? you didn't actually learn and you figured you'd cram for the single big test?
tough luck brainlet
>>7995724
too much stress
I used to be an A student and I don't want to admit that I'm trying to "just get by" with B's now.
Though my nuclear physics class got utterly fucked this semester by academic politics.
>>7995724
The brainlet meme is no better than gorilla posting.
You're shitting up the board.
There is one and only one reason we should be hyped for graphene. That is the production of macroscale buckminsterfullerenes.
Just imagine a buckminsterfullerene so big you could hold it in your hands
>>7995042
BAZOOPLES
>>7995042
okay what is with all these graphene threads
are we being raided by a shill company or something
>>7995042
Does such a thing have any purpose besides a neat desk ornament?
Why is this the only thing we should be hyped about?
they say graphine the future of science because graphine does everything better than everything else
it is the best conductor and insulator, its the hardest and most flexible (more than diamonds), its the most lightest and strongest, and it converts sunlight into energy
they say graphine will be used instead of iron and steel, and instead of natural gas we will use graphine fuel for our cars
and they say graphine will replace transistors in computers because it is faster than metal at moving electrons
once graphine takes off it will be a revolution...
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please shut up
>>7994734
I give up, why?
>>7994750
i dsont know
Trying to use a brushed DC motor (same as pictured, but a larger model) as a variable load for a rotating drive mechanism by inducing Eddy currents that oppose the direction of the rotating magnetic field.
I'd like to PWM a MOSFET to connect a fixed resistor to the motor, thus applying a braking effect that can be controlled by the duty cycle of the PWM.
Are there disadvantages to this approach? And since I can't use a flyback diode, can I use a zener or diac instead?
Any thoughts are more than welcome!
You'd probably have better luck over at /diy/ for stuff like this, they have a whole general for amateur electronics
>disadvantages to this approach?
Don't think so, but eddy currents are merely a side effect, what you use here is the motor as generator and the resistor dissipates the energy. Zener diode or VDR as overvoltage protection parallel to the MOSFET.
>>7993963
So when the MOSFET goes to OFF state, won't the voltage over the motor spike because of the self inductance of the windings and the sudden change in current?
I'm worried that I'm stupid, /sci/. I feel stupid. When I try to process thoughts in my head I just don't think my mind works like someone's that's intelligent. I took an online IQ test that consisted of pattern recognition problems and it put my IQ at 106. I'm anxious that my IQ might be around 80 or I'm borderline mentally retarded. I think my mind works slow. I see other people verbalise complex ideas from thought to speech and I can barely string together a coherent sentence about the weather. I have people ask me if I'm drunk because...
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>>7993286
I can't tell if your intelligence is below average or normal just from this post, but I'm almost certain you have an anxiety disorder. Med student, going for psychiatry.
Joel is that you
If you like ika-chan you can't be all that bad.
Would it take off?
I think so. It also seems like it would crash into the front of treadmill as soon as it did. I don't know shit about physics though.
>>7992852
Is air passing rapidly over the wings? Then no
>>7992857
What if there was a fan at the front of the treadmill?
What exactly are the fields that are considered "girl science"?
Biology
inb4 computer science
exercise science
biology
>>7992533
Biology, Chemistry, ... Psychology
but it doesnt mean they are girls only.
nothing more interesting and alarming than Crispr-Cas9 atm.
Assuming that spaceflight eventually becomes as common as regular flight today and space colonization becomes relatively trivial (including highly effective radiation shielding), how many people could our solar system support? When would resources become a serious problem? How long would it take before we'd have to seek out other star systems expand into?
For the purpose of discussion let's draw the border of the "solar system" at the orbit of Pluto, even though it extends out further because as things stand now, most objects beyond Pluto's orbit...
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Nothing past the asteroid belt will ever be colonized because the Jovian system and other parts of the giant planets are steeped in deadly cosmic radiation you could never protect against realistically.
>>7991464
>Dat pic
I think it's time to crack out the Cowboy Bebop boxsets again
>>7991475
would they not have a strong enough magnetic field to provide enough protection?
what are the real risks of having sex without condoms with random people (girls)?
I feel we live in a age where public perception has been biased by condom companies marketing.
I'll appreaciate any real information.
>>7996537
No downsides at all. STDs are madeup by the government in the pocket of Big Condom and women only become pregnant by swallowing sperm and not from sex without condoms. Don't believe their lies.
>>7996537
>I feel we live in a age where public perception has been biased by condom companies marketing.
Are you an anti-vaxxer as well?
Anyway, unless a girl is on her period, there's a real chance that she can get pregnant if you creampie her.
>>7996552
yeah, but what are the real risk anon, like what does science says.
Why are planets and stuff round?
>>7996259
Because gravity seemingly works like a point mass on celestial bodies and has a radial spread.
>>7996262
So what creates gravity?
>>7996263
What do you mean, its a fundamental law since the big bang.
>591 episodes
>21 minutes per episode
>24 frames per second
591*21*24
did someone really draw 297864 images to produce the Simpsons ?
you just did the math
if numbers are accurate then yes
stupid question really
>>7992076
>did someone
someones did.
>>7992076
stfu
Anyone here taking modafinil (to boost studying)? how is it like? what else do you take with it (piracetam...)?
No.
why are you making the same fucking thread every day ?
>>7996072
"Drugs can boost rate of thinking/rationality," is a LessWrong meme. If I have these people pegged right, they conceive of the possibility that there may be some kind of abstract "responsibility" to shill for intelligence augmentation on /sci/.
TL;DR: They're brainlets.
Is biological immortality possible /sci/?
>>7995570
Yes
>>7995570
Depends on what precisely you mean by "biological immortality"
>>7995575
Immortality without reliance on things like cybernetics or other machines.
What are Mathematical problems/conjectures that will never be proven/disproved?
The Cock Conjecture: OP is a faggot
Not even Jacob Barnett can figure out a proof to this one
>>7995382
no, you're wrong. face it.
infinitely many since john von neumann died before he could solve the equation to the universe and there will never be another person as smart as him
