Archived threads in /sci/ - Science & Math - 1511. page

define observer

>>8230548

Good one. Define "observer" in a 4chan thread. Haven't entire books been written on determining what constitutes an oberserver, especially in quantum mechanics?

>>8229899

I would argue objective, in that there is existence and a set of laws and conditions that govern it outside our perceptions.

An example would be hallucinogens: Substances that alter our perception of reality and stimulate/inhibit our senses. If I took a hit of Salvia around a group of sober people and saw humpty dumpty appear out of nowhere and the colors get all weird colors for five mons there would be two different subjective interpretations of an objective reality between the individual and the group.

>>8229890
Probability is not objective. Probability is shit.

I've thought of a better model for probability in where if something has a bigger chance of happening, it will always happen.

For example, for any coin in existence if you flip it, it will always fall in the same face because all coins have a deformity that will make it have a 50.000000000001% of being heads or tails instead of the other possibility.

This world would be objectively better for us mathematicians. However, other things like dice rolls would get realy fucked up.

You throw a dice and want it to fall in either 3,4,5 or 6. Because it has a higher chance to fall on these numbers that on the other possibility (1 or 2) it will always fall in 3, 4, 5 or 6.

But you can also frame this probability the other way around. Your chances of getting 1,2,3 or 4 instead of 5 or 6 are very high so it will always happen.

So in configuration will dice land? Always on 3 because in this objective probability universe 3 is the only number that can satisfy both realities.

Also if you frame your probability in terms of getting a 1,2 or 3 instead of a 4, 5 or 6 then that is 50/50 so the probability function will collapse to the systems previously defined and the dice will still roll a 3 every single time.

Basically, this universe is gay as fuck.

>>8229904
>this universe is gay as fuck.

I mean the universe we currently live in is shit. The universe I am describing is simply just better.

>>8229904
>I've thought of a better model for probability

This should be entertaining.

We would bother for the sake of colonisation, and later for mineral extraction. It would likely be the same story for them.

If they had travel capabilities beyond what we can imagine, then they might survey star systems on a very small scale, almost as if going on a hike.

>>8229865
I would hope they would be intergalactic anthropologists, just coming by to observe us from orbit. Not the kind that want our natural resources.

>>8229875
Why not choose a planet without living species? We already depleted some parts of our planet. Sort of intergalactic ecosystem law. and we know that there are millions of Earth like planets so they could choose something different.

>who

you mean what

the photographer

God

File: image.png (186KB, 463x515px) Image search: [Google]

186KB, 463x515px

>>8229756
It is commonly taught.
In grade school

Glad /x/ could help

>>8229762
It isn't though, not more than "children did you know it's 384400 km to the moon 8^D". It has to be visualized

File: image.jpg (212KB, 1400x746px) Image search: [Google]

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>>8229770
>It has to be visualized
It is.
Your pic isn't the only image in textbooks. Your image is only to show relative size of the planets
>see pic of relative distance
Little children everywhere stand in classrooms, playgrounds, gymnasiums, and football pitches and mark off the relative distances.
That your local school district didn't push this understanding isn't indicative of all school districts.

As always, /x/ is happy to help

>>8229669
Practice more.

https://stockfishchess.org/

https://en.wikipedia.org/wiki/Curry%E2%80%93Howard_correspondence

>>8229669
What i did was played thousands of hours of online chess on the hardest AI

Why do you want to learn it?

>>8229596

I want to make LSD.

>>8229600
You won't get the lab experience you need. You'll find that you're quickly over your head. LSD production isn't the meth walk-in-the-park.

>>8229543
>why is lighter skin favored in less sunny areas
vitamin d

http://www.news-medical.net/health/What-is-Melanin.aspx

https://en.m.wikipedia.org/wiki/Melanosome

The evolutionary pressure for skin tone is more likely dependent on sexual selection and population dynamics.

>>8229556
Is the positive evolutionary selection for lighter skin because of vitamin D production really that extreme that darker skinned people would be out-bred? I mean if you look at darker skinned people in the north in the modern day, they have no problem with getting vitamin D. At least not to the point that it would affect their population growth if they weren't careful about getting the necessary amount through modern day supplements.

>>8229513
Yep, if you don't feel any gravitational forces (i.e. the gravity is cancelled out because you're at the centre of a sphere) you won't have any time dilation effects either because there's no gravitational acceleration affecting you. Only in the presence of gravitational forces does time dilation come into play, and since the force acting on you would be zero you won't experience any dilation.

just make sure you don't move and offset your c of g

You don't even have to be at the center, the gravity is zero anywhere inside the shell. Well-known theorem, applies to general relativity (relativistic gravity) too.

Only problem I can think of is the shell collapsing on you.

>>8229466
I'm not a teacher but I've heard horror stories about how it isn't what people expect.
>The school and board of education give you your curriculum and you are given only a small amount of flexibility with regards to how you can teach.
>Everyone hates you because the curriculum is ass, this includes but is not limited to students, parents, and teachers.
>The general public thinks you're just a parasite living off their taxes and would like nothing more than to have your wages cut to the absolute minimum.
>Other teachers are retards and if you do manage to make teacher friends and gain any sort of political power then the administration will move you all around because they don't like that.
>In some places, most notably redneckistan (Texas), shit conditions have led to teacher shortages which have been getting filled by dumb and desperate people who simultaneously take teaching courses during night school.

Teaching might sound like a noble way to give back to society and you might think that you can actually help fix a broken math education system but unless you're at a prestigious private school or a post secondary then it's a shit job where everyone hates you.

>>8229466
>>8229488

Hey, OP here. Here's another interesting tidbit on my exposure to teaching. My mom was a third grade teacher who quit because of overbearing shit from the administration. I don't know to what extent all of this goes, but from here it sounds like the principal was this new guy who was there to, in a way, trim fat. He would go find the oldest, most well paid teachers and 'observe' their classroom incessantly. According to my mom, she had one of the most consistent high scores in testing, and she complained about it often. There's a chance she may be exaggerating, but I had her for a teacher and her class was the easiest shit ever when she was teaching me. There were like 5 senior teachers who were all making like 90K, my mom included. He would sit in their classrooms and 'observe' and take notes of their teaching. Within like 4 years 3 of the senior teachers retired early, taking pretty nice retirements (again, my mom included). It is quite weird, but I don't know if this behavior extends to the system at large, or if that was just a shit situation.

I substituted for a 10th grade high school geometry class last year for 2 months. It was very difficult because you have to teach on a schedule, you are burdened with keeping grades up, not the parents or students, or else its review after review after review. Kids dont pay attention and dont take it seriously.

Basically, i was a babysitter that had to get kids to pass the FCAT or the school makes your life worse. The pay is shit too, but i was just a sub.

>>8229393

>differential equations at 18

You're fine, buddy.

>>8229393
I can't tell, It's written in French. I don't know if it's elementary algebra or other advanced algebra from highschool. Are you in Highschool/secondary school?

Try writing in detail what you're studying and at what level. You should really improve your English as well.

>>8229401
Yeah im at high school , terminal year . And in my shithole we study 13 years in school not 12 like most countries .

>>8229389
The atmosphere gets denser and denser until it is a liquid under intense pressure.

>>8229389
>it's gravity is 1.14 times that of earth. Does that mean it's one hundred and somewhat percent more than earth's, or is it just a fraction above earth's grav?

It means on the 'surface' you would weigh 114 pounds if you weighed 100 pounds on Earth. The gravity is less than you might think Neptune's size would generate because you are that much further from Neptune's center of mass on its 'surface'.

>>8229453
>It means on the 'surface' you would weigh 114 pounds if you weighed 100 pounds on Earth.

i wonder what the long term effects would be on a human.

Its known that eyes start to change in zero gravity for example.
And not the good kind of change.

>>8229347
Start with proving P=NP
that should do it

Khan academy, easy shit.

>>8229347
A lot of this threads lately. Read the wiki. If you've read then someone needs to rewrite it.

>>8229282
You didn't blow anything apart. You just don't understand it.

>>8229282
>where the hell does the energy from for the "reacting" 30 N come from
from the potential energy of the object you just punched

>>8229282
There was no energy in the first place

Probabilities is math too

Math describes the universe well only in the parts where it's deterministic.

>>8229228
Of course it is, the universe is a simulation,