I know math and physics well. ask me shit

How the hell are you interested in math?
I need to pass one math class to keep studying but got a 9/20 so i'll have to retake that class.

I don't understand how anyone can have a genuine interest in math & physics without being either a complete autist or a psychopath.

SHUT UP BRAINLET

What are you? Some aspiring engineer who's only passionate about money? Or a high schooler who can't pass Algebra 2? Or some Arts student (or some of that bs)?

What's better, Mandlebrot or Julia set?

found the women's studies major.

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Eigenvalues represent the volume spanned by a basis. This is quite handy for a lot of applications, e.g. comparing the size of a matrix

not the same user yet im interested in math i just did really shittily back in high school and even before. dont disown it as a whole just because we're both stupid faggots with the subject.

what can my degree in industrial and applied maths lead to
what can I expect as my first few jobs
what's the formula for v_1 in the exponential smoothing with trend adjustment forecasting method

Assume a n-dimensional space with a bunch of data points. How do you find the real structure in it? The distance function already introduces a bias. Euclidean distance favors orbs. If your data is however aligned as 2 sheets of paper close to each other a separation into 2 orbs would always lead to a false result. Can you create a appropriate distance function?

classicreload.com/turbo-math-facts.html

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Not OP but I’d imagine youd find a spanning basis of linearly independent vectors and use the vector distance formula. Since you said they’d be like two sheets of paper.

>lead to
a boring ass life filled with non-creativity.

That was just an example where it doesn't work using euclidean distance. The real problem is you don't know how your data looks like. It could be next time 2 S curves. It's really easy to visually separate for us in 2d but i have no idea how you would determine how a n-dimensional space should be separated best. If you try to display it it's already a dimensional reduction which betrays the real form.

whats the sense of life?

Im taking Business Calc next semester and am pretty scared. Highest math I took was College Algebra and I did good in that but I don't know shit about Calculus. Any tips?

not op but
patrickjmt
symbolab
pauls online math notes

a reminder that physics is applied math
t.math wizard

Not op, but you should take a look at :
derivative-calculator.net/
integral-calculator.com/

These help me on problems I got stuck on. I don't know how far into calc you will go into, but a good rule is to have very good Algebra rules such as partial fraction decomposition, factoring, and remembering your expo, root, and Ln rules.

Sorry for my english im german :D

The topic is about Landau functional.
id like to calculate the correlation function of the fluctation of the paramter that respresents the magnisation of the system. Thats done by fourier ansatz. my problem is: i know that the fluctation is a real number and the fluctation is a square of the nabla of the fluctation how does i get a real solution? i get 4 terms 3 of the terms got complex coeffcients.. can i just kick the the 3 terms away? and the summation is about two momentums how do i get rid of the secound one? Thanks

Eigenvalues of a mass-stiffness matrix also are proportional to the natural frequency of a multi degree of freedom oscillator arranged in series. The eigenvectors Of these matrices represent the “modes” in which they oscillate.

partially true, but incomplete
Just because you can solve a linear canonical transform such as the Fresnel diffraction integral doesn't mean you have any insight whatsoever into what that solution implies, or how to use those results to guide the work of an electro-optics engineer working for you.

Ok OP, time to prove yourself.

1) The straight line L and the points A & B lie within a plane. The distance AB is 20 units, AL is 2 units, and BL is 14 units. Determine the orthogonal projection of AB onto L

2) Mars' orbit have a radius of about 1.5x Earth's radius. How long does it take for Mars to travel 1 lap around the Sun?

a - 0.7 years
b - 1.5 years
c - 1.9 years
d - cannot be determined

in what year was 1+1?

fuck u bitch

I gotta take Number Theory this summer in college, have you taken, and how hard is the class?

I need to replace my alternator...
How do I do it?

Find a good teacher. Use youtube. Remember that math is just a language with strict grammar rules.

Disconnect battery. Loosen the serpentine belt (using the tensioner) and take it off the alternator pulley. Remove wires and plugs from alternator. Remove mounting bolts from alternator. Replace with new alternator.

when would you date the end of real fundamental physics research and its replacement by memephysics?

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physics: how reality works
maths: what logic reality allows
it's a guy thing, we like knowing how things work because it helps us provide and protect better our families

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exam coming up in 5 days. doing basic physics but so far this year I've kinda ditched out on it. all I need to do is pass, any tips?

i'm considering just practising anything until force II, and just nail that.

How I get back with my ex gf?

Give her the square root

What an IDIOT why the FUCK haven't you joined this server yet? Post on #shitpost-chat-nsfw to not get automaticly banned by a niggermod on Yea Forums NIGGER YES YOU ARE A NIGGER, JUST DO IT YASTODAY SAID TODAY THEN J U S T DO IT .
discordapp.com\invite\zSyp9sX
Copy to your browser... EZ...NO-RULES, no yannies
GO GO GO
MSG_ID: 4rvxffn4e
CAN YOU FUCKING TELL ME WHY YOU'RE NOT HERE YOU SILLY MOTHER FUCKER
DONT READ KIKE
COPY THAT SHIT TO YOUR FUCKING BROWSER
You're non less then a literal nigger, faggot.

discordapp.com\invite\zSyp9sX
discordapp.com\invite\zSyp9sX
discordapp.com\invite\zSyp9sX

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you have a key ring with 50 identicle keys.
how many attempts (starting at a random point and going in order) untill your odds go over 51% for finding the right key.

its not 26 btw

I’ve been having difficulty with this one.

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>identical keys
1

Are traps PHYSICALLY gay?

Yes, traps are gay guys. They are so gay in fact that they change their appearance to be more attractive to straight males due to straight males outnumbering homosexual ones. But also, they know that changing their appearance will make them less attractive to homosexual males, so they have to move forward to the straight guys. Usually, it is just a guy who had a male/male sexual experience, then they realize they liked the experience, so they want to do it again, but their friend is straight and doesnt want to do it. So they change their appearance to be more appealing to the friend. Over time, it just gets out of control and they become a trap

not OP but I love me some trig, if I didn't have to leave for school right now id be all over this

tried laws of cosines/sins?
at first glance it looks like you could do it with a huge cluster fuck system of linear equations but im sure theres an easier way to do it

Youre a good Yea Forumsro, trig guy. I’ve been working on it for a while and just cant get a solution.

Which is gayer: being a top or being a bottom? I've never topped anyone, but I've bottomed several times. And here's the thing: the bottom gets the pleasure of anal stimulation, which to me is gender neutral. But the top ALWAYS has to warm up the bottom with a blow job and analingus. In my opinion, getting a dick in the ass is far less gay than having your tongue up a dude's butthole.

if the thread is still up when i get back from class, ill try to work on it with you but if not, consider office hours with your professor? either that or find a simpler version in your text and finish that, then work your way up to the question you posted

I understand your point, but as a person who licks girl buttholes, it is difficult to measure if it is gayer or not.

Thanks, trig guy. I appreciate it.

Google
Khan academy
They have a good phone app and a website with video and interactive examples on a myriad of subjects for free

>800344660

How come a mirror flips text horisontally but not vertically?

Retard Detected

having a bit of trouble with part b of this problem rn

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Can you please help with question 1? I dont know how to start

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Bump

stable solution --> dP/dt:=0. find the P that makes this true, given a,b,c

What's the easiest way to factor binomials and trinomials? I still struggle with those...

So do sub a and b = 0.06 and 0.05 or 6% and 5% of the total value?

a=.06, b=24000, c=.05

How fast would you have to be going in order to achieve the "star trek" effect of stars whizzing by?

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Ok so sub in values then solve for zero? Thanks

Much faster than the speed of light. So not possible.

Si

cube factor 3

For part B do I let dP/dt equal 8000 and solve for a and b?

Do I need to derive at all?

Suppose that it was. How many times the speed of light would you have to be going in order to see stars passing you at that frequency?

"let the stable population be 8000" just means let dP/dt=0 when P=8000, and you're given b=24000. find a condition for the values of a and c- you'll essentially solve this problem to find an equation written in terms of a and c.

Ok so rough estimate. Starts are about 5 light years apart on average. Seems like a star moves past in. Couple of seconds. So rough guess like 2 lightyears a second. I'm sure there is a better answer online.

Does delta x/delta x = 1 or 0?

Thanks user. Appreciate it. For question 6a how can I get started on that?

what kind of question is this??

x/x equals 1 for all x, except when x=0, where the limit still equals 1

so yes; delta(x)/delta(x)=1

Atleast warp 1

you're looking for constants A, B, and C such that you can decompose the original fraction into a sum of its denominator's components. in order to add each part of the fraction, you'll need like denominators; multiply (top and bottom of) A by (x+1)(x-1), B by x(x-1), C by x(x+1), and find the necessary A,B,C, such that the sum is 4.

this method is called "partial fraction decomposition", and there are many guides available all over the internet. i would personally recommend YouTuber, "PatrickJMT" for a working example.

What the fuck is orthogonality and why the fuck do I need to know it to solve PDEs?

well you are right if you calculate 1+1 in Base 1 lel

Great thanks user, I should be able to do the rest. Thanks!

So according to that, a 70 000 light year journey would take 9.7 hours?

orthogonality is a condition imposed on the basis vectors of a given space. take for example R3, the space of vectors given by 3 real numbers. every vector can be written as the sum of (a_i)x_i, where each x_i points at right angles to each other (basically the unit vectors for the x, y, and z directions.)

you need orthogonality because when solving PDEs using a method like, for instance, a Fourier series, you're basically constructing the function which satisfies the PDE as a vector equation in your space.

you can show, for example, that sin(mx) and sin(nx) are orthogonal; that the integral of sin(m*pi*x/L)sin(n*pi*x/L) over the interval [-L,L]=0 when m=/=n, or 1 when m=n. with this information, you can say that your "fourier coefficients", which are really just functions of x, will weight your solution a certain amount in the sin(pi*x/L) direction, and then another amount in the sin(2*pi*x/L) direction, and then again in the sin(3*pi*x/L) direction, etc...

this can be finite, in principle, but is generally best expressed as an infinite series.

I'm taking over this thread. OP sucks mega dick

I'm a graduate of FSU with a degree in Pure Mathematics, minor in Physics. AMA

How do magnets work?

I just looked it up and it says max speed in 0.73 of one light year per hour. So the stars moving across the screen is wrong. The stars should be much slower.

Do you think base 10 is too much of an arbitrary system to go by?

i would agree that math for its own sake is a little silly- especially when you consider that all the greatest theorems in pure mathematics are like... if u have a prime number, the value of this other number has to be 8, or something dumb like that.

okay, that's an exaggeration, but if you read into, say, the goldbach conjecture; literally, it's always like, the sum of two primes is this, or the product of this is that- the motivation behind every result in pure mathematics just seems arbitrary, and meaningless.

however, in the greater context of life: we find that some of this pure math is perfectly suited for physics, computer science /especially/, finance... in a way, the pure mathematician is tasked with building the future, and nobody ever appreciates his work because they don't understand it. and everything in pure math is kind of like that; where you'll invent something, but then it remains useless for a hundred years until some bright physicist goes, "ah hah! we can represent wave packets as complex numbers", and then they invent quantum mechanics, or something.

in a sense, people who like math for its own sake are often just highly imaginative.

Could you solve question 6a for me?

how do i derrive standard deviation formula from the variance formula?

Because, shit for brains, the denominator of delta x makes it meaningless. Remember calculus day 1?

base 10 is okay, but we really just chose it (by "we" i mean the persians of roughly the first millennia AD,) because we have 10 fingers.

on the other hand, in india, base 12 has been popular for about as long; they figure that each finger, excluding the thumb, has 3 joints, so a hand contains 12 joints altogether, which is how they've chosen to count. you can find base 12 representations of, for example, pi in old indian texts.

it's not so much that arithmetic moduli are arbitrary- we tend to choose bases which represent things we count frequently. fingers, joints, bits (think binary.) bases are arbitrary, in that sense; that doesn't mean though that they aren't a useful abstraction. we probably could never really visualize, at least, fundamental mathematics without modular arithmetic, because of our tiny human brains.

Am I even on the right track?

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dude, i literally said that the limit as x approaches zero is 1. therefore, at all points, you can regard x/x as equaling 1. are you looking to do something special with the continuity at the origin?

put ur finger in your bum

12 makes so much more sense. It's divisible by 1, 2, 3, 4 and 6

could you post the original problem? i'm very confused by what you've written :/

if it's relevant, maybe google the "tank flow" differential equation.

Explain to me what calculus is as if I was a 6 year old

having lots of factors is nice if you do lots of mental math- certain rational numbers in base ten have nonterminating decimal expansions (namely 1/3.) the more factors you have, the less often this occurs, which can be a useful quality.

in the grand scheme of math though, it isn't very important. especially because we have calculators now.

Please explain what this means. Eigenvalues are the roots of a characteristic equation. I’m assuming by basis you mean basis function aka characteristic equation.

when we use calculus, we tend to be concerned with solving for either (or both) of two properties of a given function; we want its slope at any given time, the "derivative"; or we want the area under the curve, the "integral". we're interested in these things because as it turns out, each one can represent many different things in the real world that are very important; like for example, in physics, we can show that the slope of a position versus time curve is the velocity of that curve. or we can show that the integral of the heat distributed through a room is equal to the total heat in the room.

we use calculus every day to help scientists gain an understanding of how two or more things are influencing each other to change.

Is pure mathematics more gay than applied mathematics?

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I'm trying to design a watercooler system. 40 high-power LED light engines on 10 water blocks. I want to calculate the delta in water temperature after passing through the cooling circuits to estimate how quickly the tank would heat up and ensure that I wouldn't have steam blowing from the outlet. The water passing through the heaters should be barely perceptibly warmer after a single pass through, if my calculations are correct.

>you
youtube.com/watch?v=RXJKdh1KZ0w

depends on context.

but here's an example; the eigenvalues of the quantum mechanical hamiltonian represent the energy states allowed by the system. if you can find the eigenvalues of, say, the shroedinger equation, bounded by a finite potential well (finite square well problem,) you can generate a curve representing the probability that a particle will quantum tunnel through the potential energy well, whose height is given by the square of each eigenvalue.

unfortunately, i can't give you a better answer than; it depends on what you're studying, what an eigenvalue represents.

mathematically though, they represent vectors along which a transformation only stretches or shrink, but does not translate.

way more gay. it was fun though- i enjoyed my undergrad.

i've been helping you all along, lol

What physics did you do?

quantum mechanics

Ah hey well thanks

If pie are square then why are cornbread rectangular?

lost my dog 2 days ago when he will come back op?

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on my resume i also like to say i studied a small amount of fluid mechanics, but it's actually not true- i studied the navier-stokes equation and some related bits for a semester when i took a second semester of PDEs. we did a lot of fluid flow problems... Shh!

yeah i can't help you there, lol. sorry. not an engineer- that shit confuses me, tbh.

Why are we perperuating the spherical earth model? What does the illuminati hope to gain from this?

why do niggers always be niggin?

i had a topology professor during my junior year, and on day one, a bunch of the other students and i were just chatting about the flat earth model before class, and i remember she walked into class and immediately facepalmed. she was like, "what?" and i told her the basics- that there's this idea that the earth is flat, and instead of having gravity, we're just accelerating upwards through space at a rate of 9.8m/s^2. i don't really remember much of what she said afterwards, but i remember thinking at the time that her argument was super compelling. something about riemannian manifolds, idk.

can't help it. it's in their genes :/

not sure. how does gravity work?

as it were, there /just are/ a few fundamental forces of nature. electromagnetism is one of them. in the same way that gravity is an intrinsic property of massive particles; magnetism is an intrinsic property of charged particles.

lol retard i'm a physicist & have seen plenty of math whiz's fail at physics...math is more organized & easier than physics.. thats why you have a lot of female math majors

i wouldn't say that physics is necessarily "harder" than math- i took classical mech, two levels of quantum mech, and a course in relativity while at FSU, and none of those classes were super difficult for me. however, i legit failed intro physics (F=ma and shit,) /twice/.

where the math students and the physics students diverge, in my opinion, is in that you can make a really hard physics problem with simple, foundational material. like, i struggled to find an equation for the electrical field coming off an infinitely long wire for literally like 2 weeks, and got a 34 on my first E&M test.

on the other hand, solving either of the square well problems in quantum mech- well that's basically just a harmonic oscillator. or solving sourced wave equations, for example, isn't so hard.

intro physics classes are literally just gauntlet classes. once you've made it passed them though, and made your way to real physics, then shit starts getting interesting, and it really isn't much harder than an equivalent math class.

...also, there are like no female math majors. i remember that after my sophomore year, it was literally just rare to see a girl in any of my classes. my PDE classes- one girl. Abstract algebra- no girls. complex analysis- two girls.

What's the hardest part of fluid mechanics/hydrodynamics in your opinion?

>quads

solving the navier-stokes equation for weirdly shaped regions. also, silly things like knowing how the resistance to flow changes as the shape of the region changes. like, in a straight pipe with laminar flow it's really easy- iirc the resistance is equal to the flow viscosity times the internal area of the pipe times the length; but if you change from a straight pipe to a curved one, then it becomes and integral over the pipe's length defined by a function, for example. not too much a jump in logic, but sometimes the calculations can get crazy complicated.

I want to get into nonlinear optics. Where should I start? What's some recommended prerequisites?

not sure. never studied optics. sorry.

maybe start with taking a second course in PDEs, if you haven't done so already.

Bump