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Archived threads in /sci/ - Science & Math - 290. page

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What can you do with a Physics degree?

Im interested in learning the subject but have no idea what I can use it for
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>help high schoolers/undergrads with physics problems online while posting anime girl pics
>have deep discussions online with high schoolers/undergrads that post anime girl pics
>baselessly assume intellectual superiority online and irl
>become a researcher for $peanuts and no job security
>become a code monkey for $okay if you learn to code in your spare time
>become a financial bean counter for $many if you learn that stuff in your spare time and are in the top %
>return to mommy's basement and claim autismbux

The possibilities are endless!
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>>9075101
I wonder, if you work at a university as a researcher and you get paid basically regardless of your actual economic worth, does that count as autismbux?

Is academia just a big austismbux bank?
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>>9075060
The biggest use is to stroke your own e-cock on /sci/ and similar places.
Physicsfaggots are cancerous twats, your field is a joke, 50% of physicsfucktards acquired this "love" of physics by watching sci-fi bullshit shows, the other 50% acquired it because they got into atheism and eventually found out about Based Nigger Science Man and other hack pseuds. It's the cringiest most pop-sci field of all.

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If you have an infinite amount of zero dimensional points, you have a one dimensional line. If you have an infinite amount of one dimensional lines, you have a two dimensional square. If you have an infinite amount of two dimensional squares, you have a three dimensional cube. In both Math and Physics, if you have an infinite amount of something that does not occupy a certain dimension, that will actually occupy that certain dimension.

Just.... why? Is there a reason for this? Or is it just one of the things you have to lower your head to and say "oh ok" in mathematics and science?
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>>9074772
You don't have good concepts for "infinite" or "dimension". I understand the intuition that motivates the statement, "if you have an infinite amount of something that does not occupy a certain dimension, that will actually occupy that certain dimension," but it actually isn't sensical.

I honestly mean this in the most friendly way--you're probably in high school, and if you continue studying math you'll come to have a better notion of what's going on here.
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>>9074790
Wouldn't it be just easier to answer the question instead of typing two paragraphs of passive aggressiveness? Again: points don't occupy space; yet an infinite amount of points will form a 1D line, which occupies space. The same happens with Physics, the most fundamental particles don't occupy space; yet here we are. Why? What is going on, exactly?
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>>9074809
I'm not being passive aggressive at all, I'm giving you an honest assessment. But since you're insistent, I'll say a little about the mathematics question, and not physics, because I don't know anything about physics.

>if you have an infinite amount of something that does not occupy a certain dimension, that will actually occupy that certain dimension

No such mathematical fact exists--an infinite collection of "one dimensional" objects is not by necessity "two dimensional". What you seem to be getting at is that if we're restricted to considering points in R^n, there are infinitely many n-1 dimensional cross sections of the space. But this is obvious and intuitive from the definition of R^n--because there are infinitely many objects in R.

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Why are addition and multiplication commutative?

Every math book i read starts off talking about how it assumed this. Why isn't there a proof of some kind?

isn't this a big flaw in math? you say you make a proof of all these things like the fundamental theorem of calculus and the fundamental theorem of algebra, yet you can't prove what you used to prove them with.

instead it's "let _____be commutative/associative/distributive under this set"; why can't we prove this first?

am i being insane? it seems off that math touts rigor then does this.
25 posts and 1 images submitted.
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>>9074740

Just use induction
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>>9074747
but that requires the successor function doesn't it?
>>
Please take introduction to real analysis before posting on this board
Look up what a field is

I am six feet , eight inches tall
My friend has an IQ of 157
He says he is smarter than I am tall
Is this correct?
How many standard deviations from the norm are we respectively?
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Find a plucky female "hacker" and you've got a prime-time TV show.
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>>9074710
She would have to have hacking skills in proportion to my height and his brilliance.
Are there any female computer people that good?
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>>9074731
I am a female programmer but I am a boy.

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If "extraordinary claims require extraordinary evidence", how do we explain the entire thing to someone that think your theory is bullshit, without making the person say "too long didnt read"?
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>>9074489
I've thought along similar lines.

What if you had a proof that is undeniably valid, yet the person checking the validity is too incompetent to even properly check the validity?

Just stay away from those people.

You wouldn't try to prove to a dog something you know is beyond its comprehension.

Don't waste your time.
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>>9074489
Learn to write better. Anything your bound to be explaining can be explained in two or three paragraphs. Probably less.
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>>9074489
I performed an experiment meant to determine X, the results proved X. See appendix A for calculations, methods, and appendix B for resources cited.

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Which fundamental axioms of mathematics can be illustrated pictorially, without using any symbolic notation? We could show pic related to an extraterrestrial civilisation and they would immediately realise that we understand Pythagoras' Theorem (or whatever it's called on their planet). Are there any other axioms that can be shown the same way?

Are there any fundamental ideas in physics that could be communicated in this way?
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>>9074396

I have an autistic fantasy where I am abducted by aliens, but they're nice and don't anally probe me or anything like that. They just want to gauge my intelligence.

Among some other bric-a-brac, a collection of exactly fifty metal cubes are available for me to play with. Upon one early sit-down examination, I arrange the cubes into this pattern. They seem to be impressed, mildly amused even.
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>>9074502
A human to an intelligent being capable of space travel is like a chimp to us.
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>>9074396
show them deez nuts n they will immediately understand how big they r

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Can someone give me the mathematical formula that explains how a chunk of wood can withstand the impact of 3500 pounds of metal moving at 35+ mph?
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>>9074209

because cars are designed to do that you dumbfuck
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T > C

where T is the strength of the tree and C is the strength of the car
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>>9074209
because it's not just 3500 pounds of wood, it's the root system beneath. They can extend like 30 feet

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I saw this advert on a site. Now I've only ever done A-level maths so after this ad popped up a few times I thought I may as well try to work it out.
It's basic algebra but no amount of rearranging can help me out. Is it even possible? If so what am I missing out? Sorry again for the stupid question but it really is bugging me.
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>y^2 + xy + x^2 + xy = (y+x)^2 = 50
>y^2 + xy - x^2 - xy = (y-x)^2 = 10
>y+x=+/-sqrt(50)
>y-x=+/-sqrt(10)
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12
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>>9074211
This. Just do the math.

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According to researchers at MIT, pic related is the reason for the lack of development observed in Africa. What I find interesting is that this fly thrived mainly around the Nile which of course does not extend the full length of Sub-Saharan Africa which is the most undeveloped region on the continent.

http://web.mit.edu/posner/www/WGAPE/tsetse_29october2012.pdf
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>>9073836
Who left the lid off /pol/?

This thread was there just yesterday.
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>>9073836
>bugs kept Africans from developing beyond stone age technology.

when the whites moved in and took over the nile delta they built some impressive stuff just fine.
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>>9073836
This mosquito is dead as fuck, right?

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So with the Riemann hypothesis you can take any combination of real and imaginary and reduce it to zero in the real. Except for 1.

How is this acceptable. Obviously this doesn't follow modern continuity theory. This is a mathematical anomaly.

Please explain how we can claim this outside of mathematical analysis.
15 posts and 4 images submitted.
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>So with the Riemann hypothesis you can take any combination of real and imaginary and reduce it to zero in the real. Except for 1.

This isn't sensible.

The Riemann zeta function is one defined for all complex numbers, except for 1.

Riemann hypothesis says something about a particular subset of complex numbers.

Your sentence doesn't fit.
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>>9073536
just curious but what do you mean by
>reduce it to zero
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>>9073536
Anything with imaginary numbers I just pretend doesn't exist because it's based of sqrt(-1) which can' exist. I do think it is very cool how you can calculate an integral on the real line with it but other than that I just take it as a bunch of mumbo jumbo. I haven't taken much physics so maybe thats why I don't really like i

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What if I asked you to find me two non-integer rational numbers [math] a,b [/math] such that all of [math] a-b, a^2 - b^2, a^3 - b^3, a^4 - b^4 [/math] are integers?
Would you be able to do it? What if I then added that the denominator of [math] a [/math] must be exactly 123456789?

Think it is impossible? Well, it isn't. Consider [math] a = \frac{1}{123456789} [/math] and [math] b = \frac{3186635400333020119148623820104080053662}{123456789} [/math].
Here are the numbers typed in wolfram alpha so that you can confirm:
http://www.wolframalpha.com/input/?i=(1%2F123456789)%5E4+-+(1%2F123456789+%2B+25811746977584360461121533139049)%5E4+is+an+integer

How did I come up with these numbers? Was it a super computer I had running for 10 weeks before making this thread? WRONG! It is the application of a theorem I proved. A theorem that can be used to find rational numbers with the property I just outlined. In fact, it can be used to find all of them! And it can even be fine tuned to find ones with specific properties, like the ones I just found for you. Hopefully you like rational numbers as much as I do. And if you do then you should read my paper. All that is needed to understand the proofs is elementary number theory: the GCD, congruences, the chinese remainder theorem, and the manipulation of the floor/ceiling functions. And if you lack these techniques but you would like to apply my theorems then to understand the final results (which are formulas to generate these special rational numbers) then you only need to understand modern mathematical notation.

Here is the paper: http://vixra.org/abs/1707.0392

It is 9 pages long (the last page is only the references) and it contains four theorems. The first theorem is about existence, and the other three theorems are constructive characterizations of these rational numbers. Pic related is a diagram in the paper.
75 posts and 6 images submitted.
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cool and good
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>>9073348
Why are you doing this?

How can you turn this knowledge into income into wealth?
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>>9073359
Get Fields medal, proceed to instant tenure.

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What is the major with the highest percentage of homosexuals and why is it without a doubt engineering?
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the highest iq of faggots is 69 because that's your iq and position i did you mom last night you fucking wavefunctionlet
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>tfw not a dumb engineer cause i studied computer science
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/sci/ made me believe that all engineers are gay and now I can't take off that stereotype of my head, what it is a bad thing since I'm a physics undergrad that shares division with, of course, other physics undergrads AND a lot of engineering undergrads. I can't stop feeling the need of scream "GAY!" to all my engineering friends in the division. I don't even know if I'm really something else for being a physics undergrad and if I have the right to make fun of my friends. I hate you, /sci/, you made me an elitist fag.

With gravity being on of the weakest forces known, is anybody else underwhelmed that the leading idea for escaping the Earth's gravity is effectively sitting something on a shit ton of fuel and lighting the fuse? Is this as creative as it gets? Something tells me with this sort of creativity we may be able to put a man on Mars just before being engulfed by the sun.
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Be grateful we're not held down by magnetic forces.
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>>9073048
>Be grateful we're not held down by magnetic forces.
That wouldn't be hard. With enough opposite charge we could easily push ourselves anywhere.
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>>9073057
> opposite charge
*Same charge

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How do you all study from textbooks?
Just reading them?
Read and make notes?
Read, make notes and do all the questions/problems?

And when you eventually move past the basic undergrad level of textbooks to the more advanced texts that don't have many or any problems, what do you all do then?

Surely there's an objectively best way to learn, understand and memorize content.
Need to know because I go to a relatively shit university.
15 posts and 5 images submitted.
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>>9072847
>read textbook
>write questions that pop into your head as you are reading it
>if question is answered somewhere later in the textbook write the answer under your question
>if it's not answered by the time you finish a chapter look online
>do all the problems
>reason out why the write answer is right and why the wrong answer is wrong
IF you really want to learn something than that's all you really need to do.
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>>9072847
I just slowly consume them. Take notes if something seems both important and likely that i'll forget it.

I make sure to try and do the examples on my own. This can be really challenging, but I've found it to be pretty rewarding to compare and contrast your thought process going into a problem vs. the odds and ends the book teaches you.

Additionally, if the book contains sample problems, such as at the end of the chapter, I make sure to do a couple of problems, and then try to do the hardest problems.

Additionally, if there are axioms or other such statements that are being proven, I might muck around on a whiteboard and see if I can just get interesting results.

If you were extremely motivated, you would take notes on everything, and input them into a spaced repetition software.

I haven't done any super complicated topics though, so I'm not sure how well this would hold up when doing particularly complex topics, but this all has worked exceedingly well for me.
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solve all the problems until they're all correct

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I was at a baby shower and we had to guess how many of these marshmallow things were in the jar. I won and wanted to see how close you faggots would get. I don't know how easy/hard it would be since you have to see pictures instead of having the real thing.

I'll reveal the answer in around 10 minutes.
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>>9072551
Here is a can for reference (sorry part of it was cut out)

I don't know why the orientation of these photos is off I don't take pics often
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>>9072551
300
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>>9072569
I think I'll wait for at least ten answers since this is sluggish. Stay tuned

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