Archived threads in /sci/ - Science & Math - 303. page
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Questions that don't deserve their own thread. I'll start us off.
Lads, I'm plebing out here.
Using:
[eqn] \frac{1}{1-x} = \sum_{i=0}^{\infty} x^{i}, |x| < 1 [/eqn]
Find a power series for:
[eqn]f(x) = \frac{1}{(1-3x)^{2}} [/eqn]
I know the derivative 1/(1-x) gives me 1/(1-x)^2. But what's the correct way to manipulate 1/(1-3x)^2 ? Runnin on 36 hours no sleep lads, the assignment is due soon.
Nice attempt in disgusing a homework thread as a stupid questions thread.
>>7918318
:^) thanks m8, I tried.
>>7918315
If I'm not mistaken you can take the derivative of the power series and then replace the value of x with 3x. If this doesn't work, then definitely think about manipulating the power series as opposed to the original equation, as that's easier to manipulate from what I remember.
Ok so i heard about the idea of building an elevator to space and i thought hey why not build like 10 around the globe and connect them in a disk - see badly drawn picture
Would this be possible?
Disscuss
You do realize that those trusses have to stay near mesospheric heights around 60km up in the air right ? No structure can withstand to stay like that without proper supporting poles. And you would have to use a tight grid structure and put supports all over the world.
tl;dr : impossible
Not impossible but probably really stupid and ugly.
No more impossible han a single elevator would be.
Also think of the things we build today that would of been impossible 100 years ago.
>>7954218
I wonder whether the ring would make the whole structure more or less stable than a single beanstalk. Having read Clarke's Fountains of Paradise, I'm aware of some of the problems, like the need for a counterweight.
On one hand, any force applied to one elevator goes up into the ring and propagates to the other elevators.
On the other hand, the ring spins with the Earth, and spinning things add stability.
So which is it?
Is becoming/being a neurosurgeon really as difficult as people make it out to be? In relation to other medical careers, notably those in surgery, how much more challenging in it?
I really want to pursue a career in this, or at least some branch of neuroscience. I don't want to solely because of "m-muh $400k+/year salary" but more-so because I have a very strong interest in the brain and its functions and want to learn about it more in-depth.
I don't want to go into psychology or psychiatry because I feel as though that is too far in the social...
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>>7953885
Neurosurgeons are relatively few and far between in relation to the majority of physicians. Residency and Fellowship positions are highly competitive, and is what people mean by "really difficult". It does carry the highest risk of malpractice out of most fields of medicine, as even the slightest mistake or poke in the wrong place and career game over.
Objectively though, I don't see how it would be any more "difficult" than most other surgeries.
>>7953885
Subquestion:
Now that I'm almost set on pursuing this, I really want to conduct my own research--it's just difficult to come up with ideas for what I want to research specifically as there are just so many possibilities. If anyone has any ideas let me know.
>>7953908
Is it seriously career game over for something so small? I guess that makes sense if you killed or sent a person into a coma over a stupid mistake but I didn't realize that it was as unstable as you described.
>>7953908
1- Brains of a doctor
2- Hands of an athlete
If looking at OPs pic doesn't baffle you already then I guess it's worth a shot, but that is a highly delicate operation
Any ausfags have experience with the Advanced Maths/Science program here or at UNSW? Share your thoughts
>>7953262
How does one get into medical school in UoS
>>7953297
From what I understand you need to score a 99.95, ace the UMAT and kill your interviews and only then will they consider you. Lowest I've heard of being accepted was a kid getting 99.90.
Of course you can always transfer after a 4 year bachelor's degree by scoring well on the GAMSAT.
>>7953298
How about perfect A levels
Need a legit way to review Calc 1 before Jun 29th when class starts.
Why? Cal 2 is not as tough as everyone around you makes it out to be. Its the series that's tough.
Just make sure you know all of the common identities for derivatives and integrals. Also, review your trig and trig identities, that's a big part of calc 2.
>>7953120
don't review calc 1, review trig and polynomial expansion.
>>7953142
>Don't review calc 1
two thirds of calc 2 is just advanced calc 1.
So a male gets one Y chromosome from his father and one X chromosome from his mother. There is nothing unclear about that.
However since female has two X chromosomes, which X chromosome will the male inherit? Always the one that's passed maternally or her other one that she got from her dad? Or is the chance 50%? Or 100%?
i dont think that how it works op
>>7952823
It's about 50-50, which you can see in the rates of X-linked diseases like red-green colorblindness, which will afflict about half of a carrier mother's male offspring.
>>7952829
this
As a scientist, do you feel like you have a moral obligation the correct someone if they are wrong about something scientific or have misconceptions?
sometimes
As a pop-scientist. I feel the obligation to load the masses with misinformation and bullshit as much as I possibly can.
>>7952335
Yes, but only if the bait is juicy.
Thoughts/Opinions? What are other nootropics that sci takes that aren't shitty health store supplements?
Tried aniracetams, with noopept with alpha choline. Shit doesn't really work so i resort to using legit amphetamines instead
>>7952043
Where do all these people thinking modafinil is a nootropic come from? It's a narcolepsy medicine. It will only make you smarter than you would be if you were half asleep.
>>7952043
It's not a nootropic
There are like 5 threads rn about this
How can a particle have half of a spin?
>>7951948
It's not "half of a spin", it's spin-1/2, which means the quantum number has value 1/2.
Torque
>>7951971
torque is cheap anon
Post problems in which the answer is simple but the solution is hard.
>How many spheres can touch a center sphere in three dimensions?
12
>hard
What is sphere packing ?
But I guess it is quite hard to prove it mathematically tbf
>>7951533
is what I was talking about, it was meant to be more like a game. I have another one to break the ice:
>What happens if you mix Red and Green?
You get Yellow
:^)
>>7951548
No you get BROWN
Friendly reminder that if you were destined to do anything groundbreaking you would have done so by now.
>Newton discovered the law of gravitation at age 23
>Einstein developed the theory of special relativity at age 26
>Boltzmann developed the Boltzmann distribution at age 24
>Galois developed Galois theory when he was 19
>Whittle invented the jet engine at age 21
>von Braun developed...
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>>7951484
Yes but they're all things that people of those age groups could easily comprehend, so of course they would invent it first.
>>7951484
I am like fine wine, I get better with age.
>>7951484
>Jobs invented the computer at age 21
I don't know but a lot of it is coming from your hot ass ;)
I'll oxidize your heat source ;)
>>7951253
because on this planet, we managed to get weird things that MAKE oxygen
>>7951273
not just on this planet, otherwise the sun couldn't burn
How can gravity be real if so many physicists say that they don't get it?
>>7951250
>physicists say that they don't get it
wat
Jayden Smith, is that u?
>>7951250
gravity isn't reel. Our minds perceive gravity because our bodies can't comprehend reality.
Are there any anons on /sci/ who can explain to me why we should support continued research into string theory? Why do people like Witten, Weinberg, and co. love this theory so much, and what makes it a good candidate for a unifying theory of the fundamental forces?
We have enough "string theory is shit" comments on /sci/, so I want to hear the other side.
>>We have enough "string theory is shit" comments on /sci/, so I want to hear the other side.
String theory is not shit
Because string theory is the best we can come up with for the formation of particles?
>>7951116
doesn't qft explain that anyway
Why do we care for elders?
It serves no evolutionary purpose for a society right? In fact, societies where resources were wasted protecting elders (who cannot reproduce and increase the numbers of the society or protect the people who do) are more likely to be annihilated by other clans right?
Why then is a respect for elders so inherent in society?
Pic unrelated
I'm not sure we live in the same society. Cause there ain't a whole lot of respect for elders in mine.
>respect for elders
>dump em in a home and let them rot for 10 years
Because it's unethical to put old people down for obvious reasons. So rather than you know, take care of them, people put them in assisted living care where they slowly lose their mind and are sometimes abused.
>>7951019
my father was a drunk who beat me. I think life has its funny ways of seeing a miserable end to a pathetic life
