/sci/ - Science & Math

can i hang myself with dental floss?

"Loss of flesh" by morphine use in 1800s and popularity around (new) hypodermic needles
It isn't a big alarm and maybe they're being dramatic and it's injection site problems. Loss of flesh seems more important if it is anything >>15729927

>>15730386
2/3rd the way down at "later"...

I read the wiki but I am still not sure why Joule is both N.m and C.V. Those are all different unrelated units. Why combining them produces the same unit? Are there any other examples of that?

>>15730565
Because in the more fundamental SI units they are identical.

I want to calculate the inertia tensor of a spherical shell. The volume of the spherical shell is distributed on its infinitely thin surface. Is this even possible? Because the object has no volume.

>>15730565
CV can be converted into work, i.e accelerating a charged particle
V literally equals Joules / Coulomb

what's the easiest way to divide big numbers without relying on guesstimation?

>>15731408
Yes, it is possible and the tensor is not 0. Just think up a formula that describes the mass of the shell and then take it from there.

>>15731494
a calculator

>>15730393
Maybe it is weight loss.

>>15731858
You could be right. I think weight/fat is yellow bile if

>>15731858
If taking that book and trying to apply it to transdermal matrix patches
Of.whixh I think is the approach to it now for clever physicians

I'm trying to find a reducing agent for a chemical I'm going to put on my skin.

Are different reducing agents better for different chemicals?

I'm thinking of using vitamin C. Ideally I'd want it to be odorless. I tried looking online, but all the other ones I could find seemed toxic. I also read that potassium, sodium, calcium, etc. were reducing agents; would those work? What is the cheapest, easiest-to-get, odorless, non-toxic reducing agent?

Ideally I'd want it to be as strong as possible. Would that make it dangerous to put on my skin? Should I set a maximum concentration or something to protect myself?

I have no fucking clue what I'm doing.

>>15731917
Maybe if you don't know what you're doing then don't go around touchy chemicals. I think you should go learn about the different types of gloves and then after that look at learning about chemicals if not more safety

>>15730098
Yes if you braid enough of it into a rope

>>15730098
It will just cut you

>>15730565
>Are there any other examples of that?
Not sure if troll.
>$1/mi = $1/mi * 1 mi/gal = $1/hr / 1 gal/hr
>1 J = 1 N * 1 m = 1 V * 1 C = 1 A * 1 Wb = 1 W * 1 s = 1 Pa * 1 m^3 = 1 kg * 1 m^2/s^2 = 1 N•m * 1 rad = ...

>>15731494
What do you know about the big numbers?
>71927271/37828274949
>~(7.2×10^7)/(3.8×10^10)
>~(7.2/3.8)×10^(7-10)
>~~(7.2/3.6)×10^-3
>~~2×10^-3

my left ear is a bit blocked by earwax and i can't hear well in it, will it go away over time?

>>15731917
Why do you want a reducing agent exactly?
What redox reaction are you trying to accomplish?

>>15732033
Yes just don't push it in
But this is without looking at it to know if you really have a more serious problem. Let me know how it goes and what a doctor says

>>15732033
Maybe, I have chronic earwax excess and the only thing that really works is irrigation with a syringe. Failing that, at your own risk, you can drop in some warm fluid (water, saline, or dilute hydrogen peroxide) and scrape it out with a hairpin. Don't poke your eardrum.

>>15732042
I've heard of people using hydrogen peroxide for earwax :)

Correctness chads I need help. When I want to disprove associativity for a binary operator, can you show it using variables or do you need concrete examples? Say x * y = 3x + 3y.
So (x * y) * z = 9x + 9y + 3z, and x * (y * z) = 3x + 9y + 9z, at this point I would say that the proof is finished, since LHS does not equal RHS, but my professor wants trivial (in my opinion) counterexamples, i,e, x = 1, y = 2, z = 3, then show that LHS doesn't equal RHS etc.
Is he being a fuckwit? Or am I just retarded?

I want to calculate the inertia tensor of a circular cone, where H is the height of the cone and R is the radius of its base. It's density is homogenous and given by [math]\mu[/math]. I want to do it using cylindrical coordinates. First I defined the function [eqn]\psi(z) = \frac{R}{H} \cdot z = \varrho.[/eqn]The purpose of this function is to determine the radius r of the cone of a given height z. Now, I would integrate [eqn]\theta_{ij} = \int_0^{2\pi} \int_0^H \mu \cdot \left(\left(\vec{x}^2\right) \delta_{ij} - x_i x_j\right) \cdot \psi(z)\, dz\, d\varphi,[/eqn]where [eqn]x_1 = \psi(z)\cos \varphi,\ \ \ \psi(z) \sin \varphi,\ \ \ x_3 = z.[/eqn]

Can you tell me, if this ansatz is correct?

>>15732084
well, since it's a disproof, it's not like there's anything wrong with using simple counterexamples
But to insist on that over variables is pretty stupid, yeah. Don't remember a single instance where we were explicitly told to not use variables for that sort of thing

>>15732119
Nvm, it's wrong. I would have had to take the center of mass into account.

Can you solve max flow problems for undirected graphs using linear programming? I can figure out the correct constraints and as such only produce nonsense.

>>15732173
can't*

Thinking about how Paracetamol was invented < 100 years after/during the "the addiction" times when morphine was new and talked about in a medical sciences journal, which in it said, they don't have deterrents for this
And how at the very least they might have over-dosed someone on paracetamol with morphine to mix up the two feelings in the patients understanding or perception of the world to then associate the negative paracetamol effects with taking morphine. But Bayer invented heroin and thankfully looked at azo dyes later on to cure infection. This might've let them arrive here with symmetrically structured chemicals (opioids) with alcohol groups attached for anti abuse drugs and how they are today

In that the azo dyes were researched and what they later used on opioids and the infliction the original (red dye) sought to cure ...

In that the azo dyes were researched and what they later used on opioids and the infliction the original (red dye) sought to cure was an e timely differ ent one. I think it was a parasite

We should dope milk or sugar and allow the body to add it's own phosphor to it and then store to release the dopamine later

>>15732084
what if you have some stupid algebra where the only element is 0 or everything is mod3 and then the LHS is the RHS? Just give a simple counterexample, it is both cleaner and less work.

is there a way to use russell's paradox to prove god is not all powerful (can do anything)?

>>15731494
Symmetrical division

Me (left) putting in a carbon and it's hydrogens attached- from a chemical structure and as piperidine (the coin) - to the liver and getting back the chemical as norchemical (hot dog)

The P450 cytochrome has taken the chemicals C attached piperidine and attached the active part to the u, mu, o, k receptors for them to be inhibited. Noralchemical is being ejected through the liver or doing the same now one the other side of the BBB

modus tollens states that p implies q, not q, therefore not p
if not p implies q, not q, does that conclude p?
if p implies not q, q, does that conclude not p?

Does anyone know if there is a reason why in the delta epsilon definition it says |x-a| must be greater than 0? I would think that for a lot of limits. Just learned about the definition yesterday.

>>15732305
No. All Russell's paradaox essentially comes down to is that a "bad" set of axioms will lead to an inconsistent theory and that sometimes it is really difficult to know if your axioms are inconsistent.

>>15729927
Can someone explain to me why the fuck the root locus exists to the right of -2? I was told the root locus only exists only in areas where to the right there are odd number of poles. To the right of -2 there are an even number of poles (0)
>>15708447
>>15726238
>>15729510
It went well enough (for control systems, which is literally harder than any other Mech Engg subject)
I got the centroid right (-10), the asymptotes right (60, 180, 300 degrees) but I drew the root locuses wrong which was the entire point of the question
My passing of that paper depends on this Q and I got it wrong

>>15732587
Make truth tables you lazy twat, see for yourself

>>15732605
As opposed to what?
> |x-a| could be zero
Meaning x=a? Then how do you define the limit behavior?
> |x-a| could be negative
No it couldn't

On the coordinate plane, what is the smallest equilateral triangle all of whose vertices line lie on grid points(ie both abscissa and oordinate are integers)
For reference, let's say one vertex is the origin

>>15732847
It's not possible since if you split it into two right-angled triangles one of the vertex lengths has to be a multiple of [math]\tan(60) = \sqrt{3}[/math] and so must is irrational.

happy cirno day, /sqt/

>>15732847
theres a really pretty infinite descent geometric proof of the impossibility of this that i cant find at the moment.

>>15732924
ah, here it is.
https://math.stackexchange.com/questions/1359762/is-it-possible-to-put-an-equilateral-triangle-onto-a-square-grid-so-that-all-the

Where do you prep for calculus?

>>15731483
> V literally equals Joules / Coulomb
More literally, watts / ampere. The ampere is a base unit, the coulomb a derived unit (ampere-second). The reason being that it's easier to (directly) measure current than charge.

Also: the names of SI units aren't capitalised, even if they are named after people. Unit abbreviations are capital letters if the unit is named after a person, lower-case if not.

Is there an element that would function as ice does for ice rinks but normal temperatures maybe 70 f?

When extremising the integral, I, of a functional, F(x,y,y'), between fixed end points x=a, x=b (with given y(a) and y(b)) you get the first order change by a variation in y(x) -> y(x) + αη(x) given by: δI = [ηdF/dy'] (evaluated from a to b) + the integral over x from a to b of (dF/dy - d/dx(dF/dy'))η.

If now we still have x=a fixed but the upper end point is free to lie anywhere on a curve h(x,y)=0, then δI=the same as above but + F(b)Δx, where Δx is the displacement in the x-direction of the upper end point and F(b) is the value of F at x=b. It then says that Δy=η(b)+y'(b)Δx. I don't get why it isn't Δy=αη(b)+y'(b)Δx as the variation in y (Eq. 20.22) is supposed to be y(x) + αη(x), that's how we even derived Euler-Lagrange.

>>15729927
Says here the Muslims liked opium
Says they sold it to China. Says China sold it to the EU first
Egypt sold opium to China too
Said the Muslims called opium tintures "mash allah" - literally a "work of God"
That poppies aren't even haram and neither are the seeds if they haven't touched the latex but that 200 years ago they didn't care

Can someone explain this meme?

>>15733639
Where is the question?

>>15733635
Only thing I can think of is that is has something to do with the fact that strawberrys aren't actually berries. What ever it's meant to be it's a shit meme.

>>15733665
Inside you this whole time

how do I find the domain and range of y = arcsin3x - pi/2

Let [math]\lambda[/math] be the Lebesgue measure on [math]\mathbb{R}[/math]. A Borel map [math]T: \mathbb{R} \to \mathbb{R}[/math] is called measure-preserving if [math]\lambda(T^{-1} A) = \lambda(A)[/math], [math]\forall A \subset \mathbb{R}[/math] Borel.

Suppose [math]T_n ,T: \mathbb{R} \to \mathbb{R}[/math] are measure-preserving maps such that [math]\lambda (T_{n}^{-1} A \Delta T^{-1} A) \to 0[/math] as [math]n \to \infty[/math], [math]\forall A \subset \mathbb{R}[/math] of finite measure. Does this imply that [math]\lambda (T_{n}^{-1} A \Delta T^{-1} A) \to 0[/math] even when [math]A[/math] has infinite measure?

>First year college chemistry class
>Professor is literally a female basedjack.
>Doesn't teach anything, only assigns required reading or basedjack youtube videos.
>Assigns a packet of homework a week.
>Over 150 questions, must show work
>Only worth 5 points
>Considered just not doing them, but don't want some monkey class to negatively affect my GPA.
>No respect for time, can't concentrate equally on other subjects because I'm just doing useless fucking packets.
>Her required reading is a textbook she wrote.
>Leaves way more questions than answers.
>Had to substitute with lectures from youtube.
It's too late to drop or change classes. Sorry for the blogspot but I just feel trapped and want some sound advice on how to handle it.

>>15734143
If everyone feels like this, why not go to her superiors and demand a compromise. If not, then you just have to suck it up.

If I have an object, the moments of inertia of which are all equal, then what illustrative qualities does this object have? For example, what cool qualities does it have when being thrown or rotated, etc.

>>15734143
>>Only worth 5 points
>>Considered just not doing them
there's your answer
>muh GPA
git gut

>>15733722
the domain of [math]\arcsin{u}[/math] is [math]-1 \leq u \leq 1[/math], with [math]u=3x[/math], it follows that [math]-\frac{1}{3} \leq x \leq \frac{1}{3}[/math]
as for the range, the range of the arcsin function is between [math]-\frac{\pi}{2}[/math] and [math]\frac{\pi}{2}[/math] so factoring in the subtraction it follows that [math]-\pi \leq y \leq 0[/math]

Why do we use cos^(-1) to find theta here? Why can't we use sin^(-1) ez pz

>>15733670
On the contrary, if its just random nonsense, it is so subtley crafted to look like a high IQ meme, its a better troll meme than bondburger. Props to the creator.

>>15734732
I figured it out. I'm not retarded, just sleepy

If I add testosterone to soil, will that make my avocado grow better?

How do I taylor expand [math] \frac{e^{ax}-e^{-ax}}{e^{ax}+e^{-ax}} [/math]
Is it not just expanding [math] e^{xa} & e^{-xa}
[/math] which give [math] 1 + ax + a^2x^2/2... & 1 - ax + a^2x^2/2[/math] respectaylor expand e^(-ax)tively?
then taking out ax from the end result i get [math] ax(1+a^3x^3/3+a^5x^5/5). [/math] Wolfram says the /5 is wrong but I don't understand why.

>>15734961
You could try writing the top and bottom terms as hyperbolic functions. You should then find the expression simplifies to a single function which you may find easier to find the taylor series for.

>>15735027
The problem is I don't think I'm wrong. Could wolfram just be fucking it up?

>>15735039
That is a known function written in exponential form and Wolfram is not wrong. Your expression is simply incorrect, I'm not even sure how you obtained it given the relevant expansions of [math]e^{\pm ax}[/math].

Why is the time t an extra variable in a holonomic constraint? Aren't the coordinates x_1 to x_3N already functions in respect to time?

Couldn't you get rid of either the time or the coordinate functions, if you argue from a strict mathematical pov?

>>15729927
I'm taking biology classes for a 2 years degree. however i just found out it's really hard to get a job in biology with a bachelors, am i retarded or are biologists not in high demand?

>>15734927
No I don't think it will do anything

>>15735293
you will be a pipette bitch and you will like it

Bevause that's what a scientist looks like

Post the best YouTube videos of those really "goes hard" pharma commercials

"Please"

if determinism is defined as the ability to step the universe from one state to the next, how can a universe without encoded velocity be deterministic?

if a particular state has a ball halfway up an incline, how do you know if it's rolling up or down given just info for 3D space+time?

If the vein is enlarged and then shut and everything's fine in that (also without shrinking it before it's shut), why can't things be put (stored) inside it, and, if the body can function well without some of its veins then why can't this be done to most people?

>>15735649
> a universe without encoded velocity
what have you been smoking? what does that even mean?

Learning the graphs of trigonometric functions are necessary ? Are they anyhow useful in solving questions ?

>>15735866
Visualisation of any function is a useful tool to have. For example it's often the first thing you should do when looking for the roots of some complicated equation.

How do I solve:
xY'-Y+Y^2Y'=0?

Let's say you have a dataset like pic related, detailing the occurrence of certain cultivated crops over a period spanning 1500 years.

What type of statistical analysis would be the most effective to plot any sort of trends or tendencies? This with the idea of comparing the data with events during that period, which might have led to changes in crop cultivation, which would be apparent in the analysis. Correspondence analysis, principal component analysis, something else?

How do I self-study chemistry without accidentally killing myself?

>>15736281
Use simulation software? Of course, that won't teach you how to physically handle chemicals without killing yourself, but I suppose you could assess the safety of a project and test the potential consequences of fucking up various stages.

>>15731917
What are you trying to do.
Defining a goal for you experiment will inform your choice of reducing agent and the level of safety required. Try looking an an SDS on any possible chemical you might use and make a risk assessment before you use it. Most chemical wholesalers (sigma-aldrich, Merck, etc) should provide an SDS for each of their products.

Most importantly, if you can't do a balanced equation for your experiment and you can't define why it is you are doing a particular thing, then don't do it.

>>15736281
Go to university

>>15736343
>Be American
>Go to university
>Work in the lab
>The token minority is mixing some spicy chemicals
>Happen to stand next to her
>Get blown up

Is a rigid body only time-dependent, if it is rotating?

Is the inertia tensor of a rigid body only time-dependent, if the body is rotating?

How do I solve this differential equation: [math]-\sin(y) = \ddot{y}[/math]?

>>15736347
Not him but ThatChemist has good videos on YouTube talking about people having bad experiences because of other people

>>15736396
you don't

>>15735630

https://youtu.be/zrsvFqCsBXQ?si=8ALpNTq6srI18_iJ
I think this is big pharma lithium (?)

Hello, please explain what happened in the highlighted text, I'm assuming it's some sort of change of variable, or some fuckery with differentials, but I don't know how to do that kind of calculus yet

>>15736865
forgot pic AAAAAAARGH!!!!!!!!!!!!!!!!

what is a normal amount of tequila shots to get buzzed on or drunk on

>>15736396
[math] \displaystyle
-\sin(y) = y'' \\
-y'\cos(y) = y''' \\
(y')^2\sin(y) -y''\cos(y) = y'''' \\
y''y''' - y''(y')^3 - y'y'''' = 0
[/math]
i think this has an analytical solution. or maybe not iunno.
>>15736870
its just chain rule.
you want the derivative of the area with respect to angle, so you find the derivative of the area with respect to radius, then you find the derivative of the radius with respect to the angle, then you multiply them. i.e., [math] \frac{da}{d \beta} = \frac{da}{dr} \frac{dr}{d \beta} [/math]
the area of a circle is [math]\pi r^2 [/math]. the change in area with respect to radius would then be [math]\frac{d}{dr}(\pi r^2) = 2 \pi r dr [/math]. this is the "area of the ring" when you increase the radius by a little bit. plug in [math]r=l \tan \beta [/math] and you get [math]2 \pi (l \tan \beta) \; d(l \tan \beta)[/math]. then you "distribute" the [math]d[/math] by taking the derivative with respect to the angle [math]\beta[/math]. get it?

Oooh, yes I have learned about that actually, I need to get better at spotting this sort of stuff, I'll have to take another look at single-variable again, thanks.

Glad I didn't post on 4chan intrusive psychopathic thoughts that are completely normal about surgery and
How cutting people open is like meat when they're numb
Or the organs in the body is an engine when you're inside. And, like, you're going to impact that body when you're tinkering with them (est quid est et est enginicus),
They [in unison] oh!

I mean because of the fact-- did you know, to not rhyme-- in the past, they'd grasp your dead heart in their hands and squeeze it, as if to perform CPR in the olden times?! Now you do! Now you do... And
And, this hole in the soft part of your chest is still often performed. That is why I said I said glad. It is not what the mathematical man would think of me but that, indeed, the body is an engine; we kick start it if we must. The organs are but machine pieces and we may move them upon our will, and, seeing the insides of them, may do so, in ways such as those mechanical. I could grab your heart and squeeze, and reset the R rhtym should it be abnormal or for any other Humber of other alements. And so it is

And Morpheus is indifferent for when I used him to learn. He says nothing at all, as I desxend into a fever and also a delirium most fierce. Quite mad. But it is only that the system dictate I ought to take out a student loan! For be it the reason, non-forbayed! Alas. Alas! For I'm hopeless in fighting the tides of the great Ocean attempting to sweep me, it's great waves - not into slumber, for morphius is indifferent - but of the world, and, as my body, must I fight that, alongside my own self? Aa. Well, I shan't; and if I were to, it would be for benefit
I'd like to simply stick epipens inside of people in side 5he war zone

For I am found myself in now a 27 year old man, the same as the 27 6ear old before I, doing the same as me. But I have no femboys. I'm going to poison myself with a substance to go and flirt with the male nurse then

Nurses in America have to follow you in to the bathroom if youve threatened to go kill yourself. Me I would like to follow them into 5j4 bathroom multiple times per day

Mind you not the mentally ill. YOU, anon, need to stay healthy and okay :) and be happy. And I wouldn't take advtange although I do joke about sex
But I mean following the nurse in to the bahtorokm to go hseeeexo on the in the walls yes. I'm being over the top you should agree to amke a point

I'm not drunk I was asking the question because I thought otherwise I might have been sick. The taste is really bad even compared to other toxins. Bleach goes down easier

But you uave to consider, the amount of people ("currently is" but I'm hundreds of years lagging), over time୧(＾ 〰 ＾)୨, years, the amount of people with no reaction at all to opioids- currently about 10% - will, over time, decrease. For my inability to put it more likely (out of ignorance) it (this) is because of natural selection

And this ignorant persons sunmaralisis of the opioids is: the next breakthrough shall be the selective taegetting of specific parts of the molecular structure, by rotation, likely from the left, with sugar Dextro added on as glucose (the the right/is Dextro). And it shall be similar to cubes in chemistry

Perhaps just flowers first before jumping out of the second or third floor of a building

Top hasty by far

can someone explain how we get the equality here. This is if we assume a1 and a2 are collinear and have to prove ba1 + ca2 = 0, where b and c are real numbers.

My differential equation course starts tomorrow and I never used complex numbers in my life. How fucked am I?

How do you even get 11.8 Celsius from this equation?
I type (1/26.04x-1.29)/(1x4.19) and only get 0.011823…
I don’t see how multiplying this into 11.8 Celsius is logical, am I doing something wrong?

>>15736905
Two per hundred kilo

>>15737247
Wow

>>15737256
Per hour.

Okay I am at 35 shots and I guess on the blackout path where it hits me all at once. Bye then

>>15737216
>off by a factor of 10^3
hmmm i wonder what the issue is…

>>15737285
At 70kg I'm on track then but I've mixed 500ml of premade shots and energy drink so it will pick up or maybe I'll cut it off now

>>15735308
I have four. Maybe I try on the small one and the one that refuses to grow. Just a little. You didn’t seem so sure. I hope you are not mad at me. I already did.

https://165.112.140.35/catalog/nlm:nlmuid-101224016-bk

>>15737300
I don't think plants would care. If you have the means, please check the leaves anyway. And tell me what plant species it is
Be careful about the pollen, if it gets on the bees. And if bees are affected

>>15737216
what kind of retard writes temperature in lowercase
t = time
T = temperature

I’m not anti-Genetic modification of crops, we need to feed people somehow.
But how do we know for sure that changing the chemical makeup of foods that we adapted to be able to digest can’t cause gut problems?
Aren’t our enzymes basically tailor made to be able to break down specific compounds and not others?
Like some things are toxic to humans that are not in animals and vice versa.
So how can we say for sure that broadly speaking there is no risk of engineering an edible food into something that might wreak havoc on our digestive system?

Yeah that's crazy. You know more fructose or glucose can be found in the roots of non edible plants than that of edible ones, such as corn?

Are all rotational matrices (no reflections allowed) symmetric?

What would be the consequences for humans if an atomic or hydrogen bomb blew up at the bottom of the ocean, deadly tsunami?
If a simple nuclear submarine that isn’t carrying nuclear bombs sunk it wouldn’t cause any problems besides radiation, right? It would be easier to fix?

https://youtu.be/ILgSesWMUEI?feature=shared

>>15737380
There's no Tsunami. Look up Baker test.

>>15737388
> At 11 seconds after detonation, the first wave was 1,000 feet (305 m) from surface zero and 94 feet (29 m) high.[109] By the time it reached the Bikini Island beach, 3.5 miles (6 km) away, it was a nine-wave set with shore breakers up to 15 feet (5 m) high, which tossed landing craft onto the beach and filled them with sand.[110]
Actually there was, oops

Quid est
Ad Listlessly est quid est

Literally

>>15737402
That’s an atomic bomb. The one that’s close to Japan’s shore is a much more powerful hydrogen bomb. I don’t really know if it’s powerful enough to destroy the entire island of Okinawa with a tsunami. It’s at a distance of around 112 km (70 miles).

>>15737380
you wouldn't cause a significant tsunami with a nuke, because the water would absorb most of the blast energy and the pressure differential would do the rest, it will cause damage in the vicinity of the blast but nothing close to what an earthquake could do for instance
>If a simple nuclear submarine that isn’t carrying nuclear bombs sunk it wouldn’t cause any problems besides radiation, right?
pretty much, America lost a bunch of nukes at sea and none of them blew up on their own

>>15729927
can you help me visualize 140 million?
i need to demonstrate the unlikelihood of winning the lottery (1:140000000)

>>15737457
I mentioned the nuclear submarines because it’s the bombs that are causing all the trouble and not the nuclear fuel that those subs use.
Because people fucked up so much with nuclear bombs now they are afraid of using it as fuel.

>>15737487
nukes don't set off on their own so in the event a SSBN would sink at the bottom of the ocean it's very unlikely anything would happen
as a matter of fact the USS Scorpion carried torpedoes with nuclear warheads and based on US Navy surveys no radioactive contamination was reported in the vicinity of the wreckage

>>15737480
that's like a single pixel out of sixteen 4k displays

This is a weird thing to say but I understand now that it must have been easy to give people alcohol and made them new recruits while they were

Not my war. This is their war

See I handle my liquor
The outburst wasn't even due to it. Was just horny or something. Hormones

Psychologist
Want to do insane things to them. Also maybe nurses the unspeakable things

Good-night and enjoy not having your questions answered here. Many such cases. Many such cases, indeed. I hope you enjoy this poetry in stead

And I have deflated my head three times already!

i didn't realize this thread was some shizos ramble.txt file

>>15737719
someone's been doing it on /djt/ too. either it's a bot, or an actual schizo is slowly losing his mind in public.
sad to see in the latter case

>>15737308
They are a big type of avocado. Nothing more than sprouts in the garage right now. The dose is diluted residual from two vials with no useable amounts for humans. Idk down to a gnat’sass. It works fast on me so, maybe I can see results before this thread dies.

>>15737719
I've never seen a good amount of questions answered here, not even once
Your post here got a reply from someone else but I bet your question didn't :) well I hope thst you don't get an answer at all

Lithium is supposed to block calcium
So what does it do in a cardioversion operation? I already think those are using the electricity to the heart and I watched someone's YouTube video on lithium and linked that itt before

>>15732036
>>15736334
I want to prevent androstenol on my skin from oxidizing.

>>15737438
>if it’s powerful enough to destroy the entire island of Okinawa with a tsunami
It is not even remotely powerful enough. The lost one was a B43 nuclear bomb, with a maximum yield of 1 megaton. A single megaton bomb is kind of meh when it goes off under 16,000 ft of water. In comparison, the 2011 Tōhoku earthquake, the one that caused the tsunami, released nearly 10 million megatons worth of seismic energy

can someone prove how this? e = v / l v l = 1, where e is a unit vector of v . specifically how v / l v l = 1

What's a good place to sell courses? Say I record 13 videos 1 hour each as an intro to some course, what platform would be ideal for selling this thing?

>>15738839
Uh... is your "vector" 1D? Wtf.

I'm doing physics and I would like to do basic geometric drawings (with annotations). How can I do this in Latex?

>>15738884
Try looking at the TikZ package first. If it can't do what you want there are a vast number of subpackages based on it that do more specific things such as graphs, charts etc.

>>15738884
TikZ is worth it and can probably do what you ask but for better styling I usually just draw things in CAD or blender or inkscape first then pull it into Latex

Could someone help me out with the problem? I don't even know how to start. Should I consider the numerator's power greater than that of the denominator and perform long division or should I count the outside squared of (2x-5) as making it equal in power to the numerator? I don't know what to do in either cases. Please help me, anon, with this question I can solve a bunch of other ones.

Does anyone of you meditate ?
I did so regularly for a while a few years ago and felt way better and higher IQ
Currently thinking of getting into meditation and fasting regularly, also digital fasting (no smartphone, no digital content)
Anyone here do the same for better mental gains ? I could use em in my EE classes

>>15739318
partial fraction decomposition, bro!

>>15738951
>>15738993
Is it better to do graphs with TikZ; rather than to use matlab, python or similar?

>>15739366
Yes, try the elemental and vital energy invocations from Franz Bardon's Initiation into Hermetics. They cause very large shifts in mentality almost immediately once you get the visualizations down.

If I got an engineering degree but I’m too stupid to actually be an engineer what can I do

>>15729927
Anons, I want your help. I fucked up my linear algebra midterms by being a lazy fuck. Help math anons

While I did understand all the concepts properly, I didn't do the past papers or the worksheets. While I knew how to answer everything, I didn't have the speed to write all the answers. I didn't have time to attempt about 30% of the exam.

The midterms make up 30% of the grade. How can I ace the other assessments so my grade doesn't tank? I want to get near 100% for the next assessments.

I actually finished the last lecture slides for the midterms at like 4 in the morning and didn't even sleep before attempting the exam.

>>15739432
It's personal preference. If you already know matlab or python graphing there are TikZ modules to directly import that output or act as a wrapper.

so I just noticed if you put hand sanitizer on something with povidone iodine (like betadine, which is usually dark brown) on it, it goes from brown to clear. like an iodine stain remover. i assume the iodine atoms are still there so i guess my questions are, what might be the chemical process here and would the clear result still be an effective disinfectant?

Why can only eukaryotes form complex organisms?

Is 127 IQ (134 spatial , 122 verbal, , 128 fluid , 120 working memory) enough to do a chemistry degree ? I'm concerned that I'm going to be too stupid lol

how much are the concepts in algebra 1 and 2 relevant to calculus, physics math and future maths? I wanna grind cooler math, fundamental algebra is so fucking boring

>>15739854
Literally all of it.
There is not a single thing in introductory algebra that is not fundamental for everything you've mentioned.

>>15739835
IQ has more to do with your ability to generally survive and navigate life than it does with learning something. Plenty of high IQ people that can't learn how to move out of their parents basement, get laid, have friends, learn a profitable skill. Because logically the safest choice is to stay in the nest and high IQ people are bound by logic.

>>15739863
fuck, well atleast hearing that makes me feel better. I hope learning maths feels more fun than memorizing steps eventually. I don't hate math... I hate not feeling like I have an actual problem to solve. I'm just hydraulic pressing information into my brain and hoping to cram it in in a timely enough manner to not drag it out longer than need be. Its not helping that the online course I'm being instructed by is literally the single worst educator I've ever encountered. A stark contrast from Khan Academy's ability to teach me in my self study.

>>15738850
I see that you too saw that one biz thread by the math teacher

>>15739534
I've been in your position, Anon. Throw away your ego and actually study and do the practice problems. It'll help you find gaps in your understanding, and also make you be able to do the specific kinds of problems that'll be on the tests fast and automatically. Do the problems the teacher suggests, since those are the ones that cover the kinds of problems that will be on the test.

>>15739835
Social media (or /pol/) has destroyed your critical thinking. No one, and I do mean no one, decides what degree to take based upon something as nebulous as an IQ test. If such a thing mattered undergraduate pass rates wouldn't be so high.

what if I define [math]\mathbb{R}[/math] to be a vector space over [math]\mathbb{Q}[/math]? it is possible isn't it?
then real numbers would be vectors?
wtf I thought scalars couldn't be vectors
what about [math]\mathbb{C}[/math]? could I define it to be a vector space over [math]\mathbb{R}[/math]?

>>15739390
That's what I don't get. I know I have to use partial fraction decomposition but I don't know how to write it down for the exercise.

>>15740727
[math]\frac{x^2+1} {(2x+5)^2(x+1)} = \frac{A}{2x+5} + \frac{B}{(2x+5)^2} + \frac{C}{x+1}[/math]
[math]x^2+1=A(2x+5)^2(x+1) + B(2x+5)(x+1) +C(2x+5)(2x+5)^2[/math]
[math]=(4x^3+24x^2+45x+25)A+(2x^2+7x+5)B+(8x^3+60x^2+150x+125)C[/math]
now solve for like terms

>>15740727
write it down as the sum of fractions where the denominator of each is the power of a polynomial in the denominator of your fraction "to be decomposed": [math]\frac{x^2+1} {(2x-5)^2(x+1)} = \frac { A } {2x-5} + \frac { B } {(2x-5)^2) + \frac {C} {x+1 }[/math]
then multiply through to get rid of the denominators on the right side, simplify, and solve for like terms

Is Nilered not making videos right now because they're going through with trans things

>>15740665
yes, any field extension gives a vector space in the natural way
>scalars can't be vectors
wrong. R is a 1d vector space over itself. God did not decree "the number 7.32 shall be known as a scalar AND NOTHING ELSE!" and hopefully your math teacher didn't either.

>>15729927
I am getting raped HARD by Calculus again, I need some help bros.

How to find sum of this series ?

Sigma (r=0, till r= 88)

Sec(r)*sec(r+1)

Any hints ?


Answer is given cot(1)*cosec(1)

>>15739318
Tried a little bit

Write x2+1 as (x+1)^2 - 1 then separate the fractions

That wil cancel out one X+1 term

>>15740986
bumping for this, please help me understand the problem. It's a complicated thing.

How is entropy a law if order exists? The universe had to have begun in a state of perfect order meaning that it would have sone mechanism to achieve that state again. To me that would make it seem as if the universe is either constantly deorganizing or reorganizing itself rather than deorganization being the only future. It just seems to me like entropy is the assumption because that's what we're perceiving right now, just like how the universe is predicted to expand infinitely because what's what we can see at this particular point.

>>15740986
>Calculus
It's just plugging shit into the quadratic formula. It has nothing to do with Calculus.

>>15741158
>How is entropy a law if order exists?
Big bunga only happens once.

>>15741043
Bump

>>15729927
Jane went to visit Jill. Jill is Jane’s only husband’s mother-in-law’s only husband’s only daughter’s only daughter. What relation is Jill to Jane?

>>15741162
it's not even that
it's literally moving x to the other side of the equation and taking the root of both sides

>>15741286
Not always, their are some problem which requiring brain storming and extreme alegebric manipulations

>>15741240
Daughter ?

>>15741240
Jane's husband mother in law is her mother, and her husband is is her father

Her only daughter is Jane, and only daughter means Jane's daughter is jill

>>15741328
yeah and the problem he posted isn't one of them

>>15741349
True

Would you quit smiling if it would make you liked more?
I have a "nervous smile" because of autism but giving up smiling seems weird. What do you think?

>>15741446
i have this too but i also have resting bitch face and they cancel out perfectly.

This is maybe a stupid question but is NP = P ?

Thanks for the quick answer guys

>>15740775
he just released a video of him making golden grills on his second channel.
https://www.youtube.com/watch?v=5hQPonVB-BE

Can someone explain the change in the order of integration here? How do we get the integral from u=z to u=x?

>>15741675
Interesting

>>15741043
Bump

>>15741710
You are integrating over the red triangle. Initial you integrate the horizontal direction first, but then you integrate in the vertical direction first (which is better since f is constant in this direction).

>>15741043
Your problem statement is incorrect

Is the US health insurance out of pocket maximum 12,000 dollars per year for everyone? How much do you pay?

Hello, I solved this equation and got (-1,-1,1), I also came to the conclusion that the system had infinite many solutions, now for a very stupid question, is the solution the book gave just one solution they gave because of the infinite solutions property? Such a very stupid and simple question, but I just want confirmation from smarter people

>>15741883
You will always be able to multiply your solution by a constant when you are solving for a null vector like you are. More generally whenever you are solving an eigenvalue equation you will be able to multiply your solution by a constant. My guess is that the authors of the book are so used to this fact that they didn't realize it would be confusing to a student.

>>15741848
Not a computational proof anon, how it went from this to cosec and cos ?

>>15742086
Also, how to improve problem solving ability for series based trigonometric problems ?

Is creating a plane of a set of linear combinations a viable strategy at figuring out if these two vectors spans a subspace?
We have two vectors, (1,1,0), (2,0,1) if we find their cross product we get a normal vector with which we can create their plane equation, x-y-2z=0, given that the plane equation equals zero it will have a zero element.

>>15742105
After continuing reading my course literature, it appears this is quite fundamental, nice to see I'm not completely useless by figuring it out on my own kind of.

What is a mapping? Is it not a requirement for mapping to a range that it succeeds for all input values?

>>15742105
Any two vector spans a subspace.

>>15742205
I see, so it's impossible for two vectors to span a subset that is not a subspace?

>>15742217
it's impossible for any amount of vectors to not span a subspace. The span is by definition the smallest subspace that contains the vectors

Why does there seem to be a conspiracy to hide the fact that men are smarter than women by manipulating IQ tests to exclude tests that men score higher on.?
https://emilkirkegaard.dk/en/2021/06/hiding-sex-differences-not-a-myth/

>>15729927
Is that EM-drive meme still going strong?

>>15742254
> 1958
You're staying up-to-date with current research I see.

It's been know for a long time that while the average is the same the variance with men is greater. So more high iq geniuses but also more complete morons. I think I know which side of the curve you lie on.

Sigma (k=0, till k=n)
Sin{(k+1)/(n+2)}*sin{(k+2)π/(n+2)}
Whole divided by

Sigma(K= 0 till k=n) sin^{2(k+1)π/(n+2)}


Find f(n)

Sorry for the improper way of writing, but how do I solve this ? Been stuck for really long

>>15742086
Did you understand my post? What you are asking to prove is an incorrect statement. You can't prove something that is not true. Either correct and clarify your post or move on.

>>15742289
I don't think you have written that correctly. Is there mean to be a Pi in the first sin(), and is that meant to be sin^2 in the bottom sum?

>>15729927
how do i solve this differential equation for v(t)?
[math]mv'=mg-kv^2[/math].
Also you can assume v(0) = 0. What I get, after using the information I just wrote, is this thing which doesn't seem right to me:
[math]v(t)=\sqrt{\frac{gm}{k}}\Biggl(\frac{1-e^{-{\frac{k}{m}}t\sqrt{\frac{4g}{k}}}}{1+e^{-{\frac{k}{m}}t\sqrt{\frac{4g}{k}}}}\Biggr)[/math]

I hope the latex doesn'tget fucked up. With wolframalpha it doesnt seem to be right but maybe i checked wrong

>>15742337
Yup. Wolfram says you are wrong: https://www.wolframalpha.com/input?i=dv%2Fdt+%3D+g+-+kv%5E2%2Fm%2C+v%280%29%3D0

>>15742337
>>15742442
Actually I tell a lie, you can probably rewrite tanh in exponential form to get what you wrote.

>>15742273
So you don't actually have a counter or anything to contribute, you just repeat the standard dictum.

>>15742536
So you'd rather disregard the common consensus because it disagrees with some skewed viewpoint you want to believe instead? Okay, you do you.

>>15742332
Yes that's sin^2 in the denominator

>>15742332
It's also mentioned n is non-negative integer and cos^-1 belongs to [0,π]

>>15743046
>>15743048
Then either learn to use [math] tags and format Latex properly, or simply write it down with a paper and pen and take a photograph. Because every time you write something the question becomes something different.

What was the explosive that explosions&fire did with a closed ring of 5 nitrogens, he said was made by the Nazis in WW2

Does [math]\frac{1-e^{2iz}}{z^2}[/math] have a first or second order pole at [math]z=0[/math]?

>>15742254
They're not, on average. A lot of studies have shown a slight advantage because men have more extreames, both smart and dumb. There were enough retards that were just too dumb to take the test and so were excluded, moving the average.

But men having more variance means men will dominate the tippity top-end of the bellcurve. If there's a job that needs to best of the best that a population has to offer, it'll typically be men. If we're striving for a real meritocracy.

There's a semi-recent movement by "progressives" that IQ tests are all bunk, because it shows these sort of uncomfortable truths that don't jive with current social progress agendas. It's a pretty horrific regression into anti-intellectualism.

>>15736767

https://youtu.be/bkgDhihL02M?si=UAA81ulLCE4Ltg_6
Same person, magnesium

>>15741853
>Is the US health insurance out of pocket maximum 12,000 dollars per year for everyone? How much do you pay?
No, it's on a plan by plan basis. Poor people are generally fucked, rich people's plan limit what they pay.

US health insurance is epically fucked up. It's so bad I think the government could do a better job.

>>15741491
>is NP = P ?
Probably not.

>How is entropy a law if order exists?
If order didn't exist, neither would entropy, there'd be no higher energy states for anything to flow to. That's the heat-death of the universe. We observe high energy things flowing to low energy states. Ordered things succumbing to chaos. This observation looks pretty universal so we call it a law.

>meaning that it would have sone mechanism to achieve that state again.
Pft, fuck no? Imagine you had a perfect doughnut. Then you ate it. Does it's perfection imply that there's some mechanism for it to reform into a perfect doughnut again? No, that's fucked up and stupid.

>It just seems to me like entropy is the assumption because that's what we're perceiving right now,
hey, that's a legit idea. But we'd have to imagine what the state would be that would let that reverse.

>just like how the universe is predicted to expand infinitely because what's what we can see at this particular point.
That's actually a big unknown. From what we can see, the rate of expansion is increasing. As in, the big bang was a MASSIVE expansion of space, faster than black holes could form, and then it slowed down. Now it's so minuscule that it's only seen at intergalactic distances. ...But it's accelerating again and we really REALLY don't know why.

There's an idea that it would have expanded out to 0 (stable) and then reverse into a Big Crunch. That's got some warm fuzzies because then, presumably, another big bang would happen. Which jives with what you're thinking. But there's diminishing evidence for that happening.

>>15743394
Well it's not really my place to say about American healthcare and I'm just trying to understand rather than looking for a reason

>>15739442
>If I got an engineering degree but I’m too stupid to actually be an engineer what can I do
Get an easier job / role within the engineering firm. Almost every firm has the serious engineers and... eh... stuff someone has to do and it'd be best if they at least knew a little something.
The whole idea with a degree is that it proves you're smart enough / capable enough to be an engineer.
College was way harder than the actual job. It's mostly just paperwork double-checking process.

If you can get the degree, you'll be fine.

>>15739442
there's a shitload of bullshit jobs for people like you, you'll be fine
knew an electrical engineer who couldn't remember how to use a fucking diode

is there any resource that teaches maths through programming? or is programming too much of a limited field to apply most college level maths?

>>15742744
why do they intentionally reduce the component of IQ tests that males score higher on?

>>15743652
project euler?

>>15732847
>>15732868
>>15732924
>>15732927
I have no idea whats going on here but this is just asking if you can put an equilateral triangle on a square grid of dots and have each vertex on a dot right?

Couldn't you just tile a plane with equilateral triangles and see that its not a square grid?

>>15733722
>>15734583
I think its of note that the range of the arcsin function is selected for convenience and practical usage, not some structure in mathematics or something you can derive.

The arcsin undoes what the sin does, and the sin function is periodic, so without the limit on arcsin you end up with an infinite number of solutions.

For a practical representation you're asking what number the hour hand on a clock is pointing to, but you don't care how many days have passed.

>>15735753
Basically because they think everything should be able to be calculable as a freeze frame in time that velocity cant be known so determinism is fake because you dont know which way the ball will go, its dumb shit.

Theyre mistaking the tools weve made to help calculate and understand reality to define it - and omitting variables.

>>15736347
Inshallah.

Should the HCl salt of a drug taste sour?
If no, does the sourness suggest leftover acid residue?

>>15743387
A first order pole. Taylor expand the exponential.

>>15743750
Yes but 'seeing' is not the same thing as a rigorous proof. A mathematician could argue that maybe if the tiling was really, really big and oriented "just so" it would work.

>>15743684
Maybe try thinking about what you just wrote for more than a second. If a test is meant to find the average general intelligence of a population then focusing on a small, specific set of problems isn't going to give the correct answer is it.

>>15743792
Sounds dumb as fuck. Don't they know the difference between speed and velocity? That's some elementary school level stupidity.

(From the figure) If g(x)=1 for |x|<=a and g(x)=0 if |x|>a, the fourier transform g^~(k)=sqrt(2/π)sin(ka)/k. If we have sin(x-z)/(x-z) then apparently, by the above, its fourier transform, f^~(k)=sqrt(π/2) if |k|<=1 and f^~(k)=0 if |k|>0. I don't get this. Surely its the inverse fourier transform?

during a bucket flush most of the water stays in the cistern right? like, some probably gets sucked into the bowl from it being suddenly emptied but it mostly stays in, right?

>>15744291
The inverse Fourier transform is itself a Fourier transform (with opposite sign in the exponent but that doesn't matter here). I don't get what is confusing you.

>>15744376
Why doesn't the opposite sign in the exponent matter? We got sin(ka)/k using exp(-ikx) and integrating with respect to x. To go back we use exp(ikx) and integrate with respect to k. They're trying to go from sin(x-z)/x-z back to that step function thing which is the inverse.

Are all surgeons schizophrenic?

>>15744393
You understand the inverse Fourier transform,
[math]g(x)=\frac{1}{\sqrt{2\pi}}\int_{-\infty}^{\infty}\sqrt{\frac{2}{\pi}}\frac {\sin ka}{k} e^{+ikx}dk.[/math]
Now flip the sign of x on both sides using g(x)=g(-x), and relabel x as k and k as (x-z). Now you have a forward Fourier transform.
[math]g(k)=\frac{1}{\sqrt{2\pi}}\int_{-\infty}^{\infty}\sqrt{\frac{2}{\pi}}\frac {\sin (x-z)a}{x-z} e^{-i(x-z)k}d(x-z).[/math]

So it's trivial to go from one to the other

>>15744434
Excellent

a linear diff equation can be wrote as [math]Ly=f(t)[/math], where L is a linear differential operator such that:
[math]L:y \mapsto Ly \\
L: C^n(I)\rightarrow C^0(I) [/math]
with I being an interval in R.
I don't get the last line I wrote; from my understanding, this operator (is it linear because the derivative is linear?) associates each y to its Ly, I don't understand why it goes from that space of functions (functions that are derivable n times in I with the nth-derivative continuous in I) to the space of functions which are continuous over I.

why is it implied (is it?) that y is derivable ONLY n times? What if my y is infinitely differentiable, does L still go to the space of functions which are only continuous over y?

Alright bros, I feel dumb. Here is my problem.

I have an event A that is Poisson distributed with parameter 2 a day. During a week, what is the probability of A happening at least 1 time a day for at least 5 days of that week?

>>15739390
>>15740749
Thanks. Also I need to write better. I always think up notes but don't write out of laziness.

>>15741045
That wouldn't work because (x+1)^2 has a 2x.

>>15734143
Read 'An introduction to Chemistry', 2nd Edition by Michael Mosher and Paul Keller. ISBN: 978-3-030-90266-7. Since Chemistry is a natural science the packets should be answerable even when using another book. I'm 50 pages in to the book (I'm reviewing my chemistry knowledge because I'm a brainlet who forget everything related from my Bachelors) and it's a delightful read so far which will surely cause you to cry tears of joy, as so far, it's very concise and explains easily. Plus, they have solutions to their practice problems on a website, which you can download for free. As for acquiring the book itself, you certainly would have to pay around 100 USD for it as you wouldn't want to download it from libgen, where, according to unsavory sources, it's available as epub or pdf.

Please show an example problem from one of the homework packets, so we may deduce if what she is asking of you is actual chemistry.

>>15744025
so image rotation is sexist?

>>15744698
>I have an event A that is Poisson distributed with parameter 2 a day

Alright, so what you have is a homogeneous Poisson process, i.e. one in which $λ(t) = 2$.
There exist such Poisson processes whose parameters vary with time, but yours doesn't, so you can look at things the following way:

1. A Poisson process can be seen in different but equivalent formulations, one of them is a family of distributions ${ N_t | t > 0}$, where $N_t$ codifies occurrences of the event you're studying in the interval $]0, t]$.
2. Note that $N_t \sim \text{Poisson}(λt)$, and the units in which you divide time are arbitrary and up to you - you could say that $t = 1$ corresponds to exactly one elapsed second - or day. The problem statement usually guides your decision, and indeed in this case it does.
3. The final hint I'll give you is that to solve problems of this kind, you need to compose different concepts - consider the following closely related question. Imagine you have a fair 2-sided coin; how would you calculate the probability that, after tossing it 5 times per day, over a week (7 days), at least 5 days of the week displayed 3 or more instances of heads?

You don't need to solve that last example, it's just meant to be a helpful pointer of a similar question with a different law of probability involved.

>>15745046
I love how all science is basically the same
>learn x, y, z
Now, I want you to demonstrate if x then a, if b then y, and if c then z.
>instead of showing one example, they make you constrain all the possibilities in the universe just to show a simple logic structure

anyone else think that is stupid? maybe I'm retarded and in denial lol

Reposting because I messed up the LaTeX

>I have an event A that is Poisson distributed with parameter 2 a day

Alright, so what you have is a homogeneous Poisson process, i.e. one in which [math] λ(t) = 2 [/math].
There exist such Poisson processes whose parameters vary with time, but yours doesn't, so you can look at things the following way:

1. A Poisson process can be seen in different but equivalent formulations, one of them is a family of distributions [math] { N_t | t > 0} [/math], where [math] N_t [/math] codifies occurrences of the event you're studying in the interval [math] ]0, t] [math].
2. Note that [math] N_t \sim \text{Poisson}(λt) [/math], and the units in which you divide time are arbitrary and up to you - you could say that [math] t = 1 [/math] corresponds to exactly one elapsed second - or day. The problem statement usually guides your decision, and indeed in this case it does.
3. The final hint I'll give you is that to solve problems of this kind, you need to compose different concepts - consider the following closely related question. Imagine you have a fair 2-sided coin; how would you calculate the probability that, after tossing it 5 times per day, over a week (7 days), at least 5 days of the week displayed 3 or more instances of heads?

You don't need to solve that last example, it's just meant to be a helpful pointer of a similar question with a different law of probability involved.

Reposting a THIRD time because I messed up the LaTeX again

>I have an event A that is Poisson distributed with parameter 2 a day

Alright, so what you have is a homogeneous Poisson process, i.e. one in which [math] λ(t) = 2 [/math].
There exist such Poisson processes whose parameters vary with time, but yours doesn't, so you can look at things the following way:

1. A Poisson process can be seen in different but equivalent formulations, one of them is a family of distributions [math] { N_t | t > 0} [/math], where [math] N_t [/math] codifies occurrences of the event you're studying in the interval [math] ]0, t] [/math].
2. Note that [math] N_t \sim \text{Poisson}(λt) [/math], and the units in which you divide time are arbitrary and up to you - you could say that [math] t = 1 [/math] corresponds to exactly one elapsed second - or day. The problem statement usually guides your decision, and indeed in this case it does.
3. The final hint I'll give you is that to solve problems of this kind, you need to compose different concepts - consider the following closely related question. Imagine you have a fair 2-sided coin; how would you calculate the probability that, after tossing it 5 times per day, over a week (7 days), at least 5 days of the week displayed 3 or more instances of heads?

You don't need to solve that last example, it's just meant to be a helpful pointer of a similar question with a different law of probability involved.

Reposting a FOURTH time because I keep messing up the LaTeX - not being able to preview posts is trash, plus /sci/'s TeX tags succ

>>15744698
>I have an event A that is Poisson distributed with parameter 2 a day

Alright, so what you have is a homogeneous Poisson process, i.e. one in which [math]λ(t) = 2[/math].
There exist such Poisson processes whose parameters vary with time, but yours doesn't, so you can look at things the following way:

1. A Poisson process can be seen in different but equivalent formulations, one of them is a family of distributions [math] \{N_t | t > 0 \} [/math], where [math] N_t [/math] codifies occurrences of the event you're studying in the interval [math] ]0, t] [/math].
2. Note that [math] N_t \sim \text{Poisson}(λt) [/math], and the units in which you divide time are arbitrary and up to you - you could say that [math] t = 1 [/math] corresponds to exactly one elapsed second - or day. The problem statement usually guides your decision, and indeed in this case it does.
3. The final hint I'll give you is that to solve problems of this kind, you need to compose different concepts - consider the following closely related question. Imagine you have a fair 2-sided coin; how would you calculate the probability that, after tossing it 5 times per day, over a week (7 days), at least 5 days of the week displayed 3 or more instances of heads?

You don't need to solve that last example, it's just meant to be a helpful pointer of a similar question with a different law of probability involved.

>>15745192
> not being able to preview posts is trash
But you can preview posts. That what the TeX button does in the reply box.

>>15729927
This is a question regarding math.
I am in College and know JACK about math. The only reason I managed back in highschook and below, was because I was helped with it on top of being held back in my younger years.
I will never be able to graduate with honors like this, I am close yet sofar, should I just graduate normally at this point? I am sick of math, it has done nothing but stress me out and yes ik I am slow I hate feeling this way.

>>15745197
Dang, my bad - it's been about 10 years since I've had to use it; I am perenially absent-minded.

I take back my words of pejoration.

I wanted to use the link in the board sticky but it said I needed a google account now.
>https://sites.google.com/site/scienceandmathguide/

What happened?

>>15745253
math may be hard but remember, you are just doing the same shit over and over in a different way

>>15743212
I don't think a 5-nitrogen ring can exist, he was probably talking about azidoazide azide

>>15745359
I think it was tetrazine?

Ok good. Methyl ethyl iso tetra

>>15745359
Do you know any of the explosives that have this suffix and uses (4) nitrogen

Why does my TV have rainbow lightsabers?
Why is the order not the same? Yellow gets replaced with pink at some point.

>>15732305
>>15732641
Yes you can, but you can also prove all possible statements. This is mostly because of the principle of explosion (anything follows from a contradiction) because the existence of russel's set is self-contradictory. [math] R\in R\iff R\notin R [/math] is a contradiction.

In what kind of "elementary" math book the concept of a manifold first appears? I've check analysis I and II books and there was nothing, then it appears everywhere in topology and vector analysis, is there some intermediate step?

>>15745887
probably just topology itself, given that manifolds are pretty much a hallmark of that
Pure analysis has little reason to be concerned with manifolds since it's mostly going to be done in proper Euclidean space

>>15745892
Thank you, I guess I'll go from Abbott or Lang into Munkres then, think I'm getting filtered by the concept of a manifold itself

How do I change the order of integration of a and b? C and d are my tries but I couldn't get it to work, sorry for phoneposting, on the way home from school

Is this wrong or am I retarded? p should be 9.08W not 0.908W. the only way you'd get 0.908 is if you multiplied by 20,000 instead of 200,000.

>>15745959
Or misread 45.4 as 4.54. It's odd to see it written like that instead of just changing the exponent, usually with scientific notation there's only one digit before the decimal point.

>>15746139
thats called engineering notation. the coefficient is between 1 and 999.999..., and the exponent is a multiple of 3. makes it easier to convert to kilo, mega, mili, micro, etc.

My girlfriend and I spent a week together and had unprotected sex maybe 40% of the time. I can't cum from vaginal stimulation so I didn't finish in her. She had her period 14 days later, but it's been a month since then. On a scale from like 0-ohshitnigga, how worried should I be, shes getting a test tomorrow.

>>15746981
Sounds to me like either way you're both badly fucked.

How the fuck am I supposed to do vector field problems, I think I'm able to accurately draw the vectors, but I can't really translate it well on paper, eventually it just becomes a fucking mess

Why can't we just combine all the computing power we have today and determine whether P = NP?

If a 10 gorillion gigahertz computer can solve a NP problem in linear time, doesn't that mean P = NP?

>>15747206
And what are we to conclude if it cannot?

>>15747206
I too have thought about this. If we connect all computers on earth like a dragonball z charactor recieving power from others.

Woah

>>15746981
I think women can miss periods unless that's just teens. Also I'm not a woman so I don't know
You can get her pregnant with just precum or if she got your sperm on her hands or you came in her from anal sex and then it dripped into her or she put her hands near her private parts without washing

>>15747210
we need more gigahertz

>>15746981
>I didn't finish in her
>She had her period 14 days later
>it's been a month since then
>shes getting a test tomorrow
Here's a better question. If she is pregnant, what are the odds you are the father, from a Bayesian standpoint?

>>15729927
so a lot of my basic chem and physics problems deal with pressure in a closed vacuum environment. How does one model pressure when there is no vacuum like in the sky?

>>15747234
It is 1 atmosphere?

>>15747235
well what i mean is how do you account for pressure around an air plane for instance?

>>15747237
In atmospheres

Maybe. I'm probably wrong

>>15747241
yeah but the sky isnt a closed vacuum. its open isnt it?

>>15747256
You would measure the atmospheric pressure relative to the normal pressure I would think

>>15747256
Like if the pressure would doubled that would b two atmospheres and you would put in the legend in your model that atmospheric pressure = 2

>>15747289
>>15747281
so a vacuum doesnt really affect anything when it comes to modeling

>>15747313
Isn't the vacuum measured in atmospheric pressure?

do you believe in human musth? I get much hornier starting the week before my gf's period every month, is there biological basis for this or am I just conditioned to get it in before it gets gross?

Can you staple water?

>>15747467
it doesnt exist and you're probably conditioned. also girls generally get hornier around that time as well for obvious biological reasons

what unit of measument is used after a mile, i.e. what is .5 of a mile called

>>15747495
Easy. Half a mile

I got stuck with these two. I'd be thankful any help.

>>15747495
https://en.wikipedia.org/wiki/Imperial_units#Length

>>15747509
And this

>>15745937
Have you tried Iverson Bracket?

>>15747507
>>15747510
When my pedometer gets to 100 that equates one mile but there doesn't seem to be any conversion where 100 of something equals one mile

>>15747544
yeah. that's why it's the imperial system and not the metric system

>>15747544
Kilometers? 1km is about 0.6 (you said. 5) so 100 might = 2km

>>15742201
A map from a set X to a set Y is an assignment x->f(x) that relates each point of X with some point y=f(x). If the presage of every. element of Y is nonempty then it's an epimorphism, as it contains at least one element.

>>15747509
Are you sure that is correct because I don't think there is a closed-formed solution to that integral.

I've oft heard that classical field theory arises from when we let the number of particles tend towards infinity. An example would be something like continuum mechanics. But, when it comes to classical electrodynamics, what is the "particle" of each electric and magnetic field?

>>15747806
There's no such concept of a limit in classical field theory, you might be confusing it statistical mechanics or maybe with quantum field theory.

Pine trees, ipas, weed, skunk asshole
Whats the common element?

Why are canadian schools really banning books written before 2008?
https://www.youtube.com/watch?v=9GYCe9XCmyg

what effect will this have on science if all books written before 2008 are removed?

I would like to program some animations for physics problems. What software is the best suited / most professional for this? Preferably, I would like to use python.

If Δz=Δx+iΔy, why isn't it f(z+Δz)=(x+Δx)^2 - (y+iΔy)^2 + 2i(x+Δx)(y+iΔy)?

>>15729927
I never took PreCalculus before but a Cousin needs help with it. Any advice?

>>15748122
Stewart

>>15747509
Bump to this, I tried with four substitutions but I got stuck.

Hi, Fentanyl citrate again

https://pubs.asahq.org/anesthesiology/article/101/3/729/9203/Influence-of-Hepatic-and-Intestinal-Cytochrome
(FENTANYL CITRATE)

>>15748107
That's exactly the same thing as the picture.

I presume you mean why doing [math] f(z+\Delta z) [/math]
results in that expansion. Consider the function [math] f(z)=z^2 [/math].
Then, [math] f(z+\Delta z)=(z+\Delta z)^2=z^2+2z\Delta z+(\Delta z)^2 [/math]

From there, replace what you had said: [math] \Delta z=\Delta x+i\Delta y [/math]

More expansion and rearrangement will create
the result in the picture given.

Do we have any theories about what type of matter/energy hawking radiation from black holes should preferentially emit? I.e., do we know if older black holes tend to just emit gamma or radio radiation? Or would it be more likely to evaporate over looooong periods of time with the release of hydrogen, helium, and lithium?
I wonder if Webb has or will look at very, very old galaxies and notice a pattern of interesting and different chemical compositions near the galactic core

>>15747509
Clearly you can first do u=5x^{1/2}+4 to simplify the cosine. Then you can repeatedly use the identity (1+cos u)/2 = cos^2 (u/2) to get rid of the triple square root.

>>15748348
Hawking radiation is just thermal radiation, in other words low energy photons. The radiation has a standard black-body radiation wavelength distribution and so you can assign a temperature to the black hole, called the Hawking temperature. Then using Wien's displacement law and a bit of math you can find that the peak wavelength of the Hawking radiation is approximately equal to 16 times the Schwarzschild radius.

So for example the black hole at the center of the Milky Way is estimated to have a Schwarzschild radius of 12 million kilometres and so the Hawking radiation would have a wavelength peak of 192 million kilometres. Since [math]E = hf = \frac{hc}{\lambda}[/math] that would mean the amount of energy carried by each photon of Hawking radiation would be absolutely minuscule, at such low energies / long wavelengths the radiation would effectively be impossible to detect by our equipment.

Because the Hawking temperature is inversely proportional to the mass of the black hole, it explains why the evaporation of a black hole through Hawking radiation is such a slow process (more than [math]10^{100}[/math] years). The amount of energy / mass being lost is tiny compared to the total mass of the black hole. It is also why miniature black holes are thought not to exist because they would rapidly vanish.

How can I make this look less ugly?

>>15748624
what's wrong with this?

>>15748689
Nothing. Only thing I might personally change is making it left-justified.

>>15748403
TYSM

>>15747511
What about this?

>>15749011
I tried using the trig identity and got it with substitution, but I couldn't do it with parts and it requires that.

>>15749011
You have a language problem there. No one knows what sen is supposed to be.

>>15749038
it's the Hispanic version of sin

>>15748608
Sweet, thank you