Solve n=np
I double dare you
let p,n=1
>>8737915
n/p=n
>>8738048
what if p=0?
>2017
>scientists still don't understand how bicycles stay upright
Well one day someone is gonna solve it and he is sure to get a nobel prize.
>>8736181
Oh, scientists do understand it. Its just that you're too much of a brainlet to understand the explanation and would rather prefer invisible leprechauns holding the bicycle upright as an answer.
>>8736189
>Oh, scientists do understand it
No they don't.
What _are_ fields?
consciousness
There is a uniform value for something everywhere, that's the field, you call that value zero, when you see a value in that field grater or lower than zero, that's a perturbation, a wave, the origin of the wave is a particle.
Not completely accurate, but should give you a good intuition
>>8740913
a ring where every non-zero element is a unit
I do not understand how stuff like psychology or sociology can be considered a science. It seems impossible to create an experiment in psychology that can actually account for all the variables (namely, everything that's happened in a subject's life up to the experiment + their genetics). No matter how much fancy statistical crap they use, nothing can overcome the fact that the experiments cannot be properly controlled.
Can someone explain how I could be wrong here? I mean stuff like psychology is clearly a different beast from something like botany or geology, which are more about empirically observing the world around us. These fields don't make claims that can't be directly observed, yet it seems that in psychology, they always use their experiments to make mass proclamations about humanity.
>physicists struggling with the concept of probability distribution
>>8740022
>Invite 1000 people to an interview
>Ask them each 600 questions about social situations
>Calculate correlations
>Repeat study everywhere
>After enough repetitions, some correlations achieve 95% threshold of certainty
>Accept those correlations as facts
To name few examples on the top of my head
1. Big five personality traits are openness, conscientiousness, extraversion, agreeableness, neuroticism
2. Cultural differences affect thought and behavior
3. Animal behavior can be fully controlled by sanctions; human behavior can largely be controlled by sanctions; you can create entire economy that doesn't force people to do stuff, but instead rewards them for doing stuff you want (=capitalism/socialism)
4. Mental disorder/diseases can have physiological or psychological causes
5. Humans have consciousness and subconsciousness
6. Identification of neurotransmitters; identification that some mental disorders can be explained and treated by increasing/decreasing them; helps designing recreational drugs too
7. Genes affect thought and behavior
8. Humans learn largely by observing and imitating other humans and nature
>>8740022
If you were familliar with statistics/probability (or even if you've taken a first course in analysis) you would understand that error can be bounded sufficiently to draw conclusions.
Einstein said spacetime is like a fabric. I disagree, and think it's more like a fluid. But I need some help working out the details.
First, let's toss out the ol' trampoline/bed sheet version of Einstein's thought experiment. We're working on three axis here, and that would mean the sheets would have to create an infinitesimally small lattice which to me seems too solid. Instead, let's think of it as clear oil in a sealed tank.
This tank is filled to the very brim, 100% full of this oil. Without opening the tank, so as not to let ANY oil or pressure escape the system, let's introduce a sponge into the tank. The sponge will quickly absorb much of the oil immediately around it, while displacing just a little and raising the pressure. Now, let's remove that sponge and place a rock into the tank of oil. The rock will not absorb nearly as much as the sponge, displacing more and raising the pressure much higher.
We can imagine the two examples as different concentrations of matter in space, where the sponge is something like a planet (porous), and the rock is more like a black hole (too solid for space to permeate).
What I'm struggling with is this: Forgetting the walls of the imaginary tank, would the pressure of the oil be highest where it meets the sponge/rock? If so, I suppose that this pressure is what we feel as "gravity".
If this is true, that would mean that gravity is literally the density of space. Also that a black hole is just matter devoid of it.
Thank you.
>>8739848
See
https://arxiv.org/pdf/0905.4352.pdf
>>8739856
Thanks much, I'll give this a read! Though maybe not until later tonight, seems pretty in-depth.
>>8739865
If you think this extremely light and low-math treatment is "pretty in-depth", then you have no business coming up with theories about the nature of spacetime.
Hey /sci/, I have a question for you. 3.5 years from now i will have a hard math exam that determines my future. How would /sci/ prepare for it? I also have other subjects to study, but maths is by far the most important
study the material in your free time ahead of whatever track you're on, then do exercises every day
>>8739420
The problem is i don't really have that much of a free time, even on weekends(where i practice math)
>>8739429
Stop wasting time with autistic normie shit then
If the weight of a star or planet curves space-time, what is it curving into? Is it really curving or do we just imagine it that way to make our equations work?
>>8739366
First of all, it's not the weight that bends spacetime, it's mass.
Weight is a scalar quantity whereas Mass is a vector. There is no direction in space so it's very important to use vector quantities for your variables. Objects in orbit do not have weight because they're always going to end up in the same position and the average weight is 0.
As to your other question, spacetime curvature has already been proven with physical experiments.
>>8739366
Apparently the poster of the first reply doesn't understand English, so let me try.
The maths modelling spacetime in general relativity just works like that. Spacetime isn't curving "into" anything. Your problem is that you're thinking that all properties of an anology used to explain something else must be identical with the properties of the phenomenon it's trying to explain. This defeats the purpose of having an analogy in the first place.
There was a video in which Feynman was asked to explain magnetism, and he said that he could not explain it by analogy because magnetism was both more fundamental and also unlike any other intuitive or everyday phenomenon. I think the same goes for spacetime curvature.
Semi-related: What does the surface of an apple curve into?
>>8739424
>Apparently the poster of the first reply doesn't understand English, so let me try.
He thinks mass and weight are the same.
>Semi-related: What does the surface of an apple curve into?
The box it came in.
>1. All living organisms are composed of one or more cells.
Abortion is murder.
>>8739178
Yes it is: https://www.youtube.com/watch?v=cuoepBsv3ZE
The cells are alive, but are completely dependent for survival on the surrogate, by aggressively nesting into the womb.
Do you call something human because it has human DNA? Or do you call it human once it starts become human enough you can call it that? Where is that line? Does killing a bacteria = murder? Do you call the uncountable amount of human cell cultures human?
>>8739194
>Where is that line?
It's when a mother has a children in her womb.
>Does killing a bacteria = murder?
Bacteria isn't human.
>two objects attract each other and you can't explain why
>invent a magical force called "gravity" that pulls them together for no reason
why is physics such a joke?
>clearly and specifically describe how this force functions
>make extremely accurate predictions based on your supposition of this force
>make a lot of discoveries about how this mysterious force interacts with other forces
>use your understanding of this made up magic force to launch spacecraft into orbit and do other complex and useful tasks
>>8737742
Well, did we really expect more of the "dark energy and dark matter" gang.?
why does pouring a liquid with a compressed gas into it cause fizz to form? its like a weird quasi-solid that I can drink??
is this bad for me? will soda fuck me up?
The pressure inside the bottle keeps the gas from escaping into bubbles. That's why soda goes flat if you leave the bottle open. The bubbles aren't always there, they form as they're exposed to air
soda is bad for you only because of the high sugar content. The fizz makes no difference
>>8737561
Its still weird imagining nitrogen diffusing out through your bodily tissues after quaffing a delicious nitrified beverage
And CO2 does have some effects, I forget what they are, maybe acidificaiton...
>>8737545
Foams are crazy mane
So how do we solve Somali famine,/sci?
I'm pretty sure the famine is already solving that problem.
>>8736157
>>8736154
GMO adapted crops, better farm machinery, less corrupt system and better education.
anyone here fall for the medicine meme?
https://www.aamc.org/newsroom/newsreleases/458074/2016_workforce_projections_04052016.html
>>8734165
>supply is going to decrease as demand goes up
I wonder who could be behind this and what incentive they'd have?
Doctors are scum. Don't get me wrong, I would also want to be paid a lot if I had to memorize 10 textbooks but that's just because the job is outdated.
Time to immigrate l e g a l l y I guess.
How can there even be a shortage, your doctors are overpaid as fuck, it's a sweet gig to be practicing in the US.
>>8734258
The shortage is artificially generated so that they can be paid more.
With all the focus on curing cancer, why don't I hear much about preventing metastasis?
Preventing metastasis in cancer is like making the fire in a house unable to spread.
And it sounds like it would be much more straightfoward: With cancer research there's a lot of focus in getting the body to recognise cancer cells from non-cancer cells, but in the bloodstream, treating any cell that does not belong in the bloodstream as potential cancer seems like a good way to go.
The only trouble would be not having the walls of the bloodstream attacked.
>>8722845
>OPs who ignore thread meta and don't have the string that people usually search for when trying to find the thread
In my experience, it's always a good idea to have a properly made thread even if an improperly made one exists.
The improperly made one flounders because half the people assume one doesn't exist, but if a properly made thread exists it can gradually take over.
Cross-linking the threads interferes with this process though; the improperly made thread receives all the attention of a normal thread by leeching off of the improperly made thread, causing the properly made thread to die, resulting in a failing improperly made thread again.
How can we taste food if the atoms are technically not touching?
Random selection is still natural selection right? Just that it doesn't necessarily (but potentially) lead to adaptation doesn't mean it is not natural selection. Am I wrong?
Think of rare events impacting the gene pool.
>>8742300
>(but potentially)
Here I meant to say NOT that it potentially leads to adaptation but rather mean that it potentially could select for certain traits - by accident.
You're thinking of something called genetic drift, which is the passing of alleles down to the next generation by pure chance as opposed to being beneficial in the environment and organism lives.
Evolution is a combination of many forces, of which natural selection and drift are amongst them.
>>8742300
Natural selection specifically refers to non-random selection via survival in nature. Random selection doesn't really make sense, since random would imply nothing is being selected at all. Rare events causing certain phenotypes to be selected would still be natural selection and non-random.
So quantum physics is basically just curve-fitting natural phenomena, right?
There'll never be a unified theory because you literally cannot derive anything a priori.
>>8741659
>So quantum physics is basically just curve-fitting natural phenomena, right?
No. Why would you think that?
>>8741674
Watching the MIT quantum physics lectures.
We use suitable models that are proven to work
>what is physics?