If you stand in a room with mirrors as the walls and floors, is the observable reflection infinite? It'd be interesting to see how a grazing animal or a far-sighted bird reacts to that phenomenon.
Pic related. I really want to build a mirror room now.
>op builds a mirror room
>enters for testing, lock door
>can't find it anymore gets locked in it forever
>>8563356
It's probably just like looking in the concave side of a shiny spoon. Jeez man, it's a mirror, not rocket science.
>>8563351
Conan solved that problem already.
If evolution is real, then why didn't the dinosaurs evolve to be able to survive meteor strikes?
If evolution is real, why didn't the mods evolve to be omniscient?
>>8562891
Random mutations aren't need driven you fuckstick, that's why. :^)
>>8562891
They weren't hit by meteor strikes starting from low power and increasing it over time.
>your field
>how can you cope with being a brainlet?
>when did you realize you were not that smart after all?
>do you regret not choosing a brainlet career like psychology or social studies?
>>8566207
>Mathematics
>I don't know if I'm a brainlet
>I don't know if I'm a brainlet yet
>Assuming I could be a brainlet, maybe not. I would still do mathematics. It is a nice career. Picking a brainlet career like medicine, engineering or physics would just make me depressed. I'd rather be a brainlet in a field of gods than a god in a field of brainlets
-CS
-I understand that not everyone can be the elite of society. I won't try and stop people with better education to look down on me, but I will not let myself look down on others. Anyone who contributes to society through their efforts is worth my respect, even if that contribution is merely being a clerk.
-Probably when I was kicked out of my physics bachelor program. Dunno if i would have passed if I actually studied. That was dumb of me. Part of me wish I could go back. I liked physics more than CS, even thought it was hard.
-CS is pretty much a brainlet degree so far. I guess it's nice to be in the top 5% of students with basically no effort.
>>8566226
>>I don't know if I'm a brainlet
you're 100% a brainlet then.
Is there a purpose of producing less happy hormones during little to no sunshine?
>>8566110
God isn't real and didn't create the universe so not everything that happens would be logical to a human 2000 years ago that didn't know about it and couldn't account for it in a poorly written boring book, so no.
>>8566110
We were supposed to be living outdoors and not staying on a house over 8 hours/day.
But we will eventually evolve to no need the sun, since y'know how contamination is killing everything since some countries are too fucking lazy to fix their shit, like China.
Perhaps staying in one place and not moving as much provides an evolutionary advantage during times of scarcity in an agricultural setting.
Any geneticists here?
Could eugenics- the sterilisation of people with a low quality genetic combination in their environment- work with our level of technology?
>>8566028
I don't know, can it?
>>8566031
What is that supposed to mean pal?
>>8566036
What do you think it means?
>brainlets and their memes
You people are funny. What is going to make us great is /g/ with their singularity, not your babby physics or astronomy memes.
What are you going to do when "code monkeys" program an intelligence that is going to outsmart you ten times and effectively replace your brainlets on the market?
>>8565884
>B8ing this hard
>not doing it on /b/
You realize threads only get one reply every ten minutes or so here, unless someone is actively participating in a particular thread, right?
This is not good hunting grounds
>>8565887
I'm trying friend, but I'm trying to insult people's intelligence since I have a inferiority complex. Brainlet insults don't work on /b/.
>>8565935
People on /b/ are literally convinced they are the most enlightened and intelligent of all
Tailor your b8 to not specify brainlets and just those with an intellectual superiority complex and watch the replies pour in
Is chiropractic medicine based on real science?
At work I keep hearing people talk about how great they are and shit. There's also a lot of videos on YouTube that are fun to watch like https://www.youtube.com/watch?v=1zvNgH6ShVQ (skip to 0:20 right away)
and also doctor-patient videos like these where they talk and interact https://www.youtube.com/watch?v=tL6-Mwawf20 Funny how sometimes the patients' body language says "I don't know" when doctor asks if they feel better.
Anyways, there's a lot of videos of patients saying they feel better, but I'm wondering about actual science. Do they really feel better or is it a placebo effect? Is this shit actually real?
pic semi-related
>>8565786
>Is chiropractic medicine based on real science?
Depends, most people see Chiropractic methods as being a glorified massage (and AFAIK there's some evidence that it's more effective for lower back issues than just massage). However actual chiropractors see their methods as being panacea, based on some nonsense about doing spinal adjustments to open blocked channels, which is clearly bullshit. The only reason they don't openly advertise chiropractic medicine as being a cure all is that they're not allowed to.
>>8565799
That makes sense. People do often comment about it feeling good, but they also thing it's some sort of medicine. In the videos chiropractors also seem to be able to fix an unrealistically wide range of problems. Most of ones I've seen improved over time and not right away, so the cause of the improvement became less clear even though the chiropractors insisted it was because of the "adjustment" that they made.
I remembered this video https://youtu.be/wtIV33HoT8g and vast majority of the video is a chiropractor adjusting a patient's back. He claims the muscle loosens up and shows a before and after comparison at 2:26 (which isn't even at the same angle)so you can't even make a useful comparison. Funny thing is the chiropractor is claiming the muscle is loosening up as it happens, with the person behind the camera agreeing. But I don't see anything.
I'm looking at Wikipedia and I see that it does say there's evidence for lower back pain relief but upon checking the sources for it, at least one of them says "CONCLUSION:
Collectively these data fail to demonstrate convincingly that spinal manipulation is an effective intervention for any condition." So I dunno why that study is there.
Chiropractic treatments can be helpful for relief of general muscle issues and pain, and many chiropractors combine muscle manipulation with a review of the patient's diet and physical activity and provide suggestions on how to live and eat healthier.
That's about it as far as evidence-based services, and it's not different from any regular physical therapist.
Also, an important note: there are many variants of chiropractors, and even within variants you have variation in the tools they use. The plain-jane chiropractors you probably are thinking of use a tool like the Activator, that spring-loaded piston thing. There's still plenty of chiropractors using manual manipulations where they put you into weird positions and thrust on your joints with all their weight. It is more painful for the patient and is notorious for fucking up the chiropractor's own joints over time.
There's also lots of really really wacky variants: Koren Specific Technique, Wave Chiropractic, fuck I know there's one or two others I wanted to mention but I'm forgetting them.
Anyway, back to plain mainstream practice. Once you get out of that realm where they're just physical therapists, you're into the realm of subluxations, mysterious 'blockages' or 'misalignments' in nerves which are invisible on x-rays and have never been demonstrated except through the symptoms they cause. They don't exist, pounding on the spine doesn't do shit, and any changes they make to the spine are reversed in minutes to hours. There's also the problem that some of their basic diagnostic techniques like checking for variations in leg length are highly susceptible
Chiropractors also tend to use other bunk tools like live blood analysis, low level laser therapy, shit like that.
What has caused the current and continuing trend of denying science?
how do we stop it?
>>8564885
>denying science
How about you stop denying the written word of God first, heathen
>>8564885
what trend?
>>8564892
recently it has become more popular to distrust scientists and their work
What do you do with books once you are done reading them, /sci/?
I have numerous books laying around, taking up space. It seems like books are disposable by nature: You read them and then you toss 'em.
>>8564672
Donate them.
>>8564672
Depends on the book. Novels stay if I really like them and otherwise get sold/donated.
Textbooks stay if they're reasonably comprehensive (I prefer to refer to a textbook rather than google when I can, especially when I need an explanation and not just a result), and otherwise get sold/donated.
I'm materialistic enough to enjoy having a big pile of shit but it has to at least be shit I like a lot.
>>8564672
>not having a personal library
Give em to Anon II
https://erowid.org/plants/cannabis/thc_data_sheet.shtml
>TOXICITY DATA: 666 MG/KG ORAL-RAT LD50
How exactly did they administer more thc than the weight of the rat?
>>8564514
>inject litre of thc into rat
>rat pops
"well guys we found the LD50"
>>8564514
That's mg per kg, so if the rat weight less than a kg, obviously it'll be less than 666mg. They need to feed it .06% of it mass in THC.
>>8564520
kek
I am attempting to carry out the tollens reagent test to re-create a mirror finish, however the solution stays clear and never changes, even over a 20 minute period of heating and swirling, i have attempted the same test twice using same method to ensure not a mistake, but it just wont work.
------------------------------------
Mixtures are:
Silver nitrate.0.1 molar (approx)... 3.4g 95%-100% particulate to 200ml De-ionised water
Sodium hydroxide 0.4 molar (approx)... 3.2g particulate to 200ml ""
Ammonia 1.0 molar (approx)... 11ml of 33% stock solution to 200ml ""
1g household sugar
I am mixing in a testube that is only rinsed with De-ionised water nitric acid seems the standard on the examples ive seen but dont have any so assuming not important for the test but only for increased clarity of the mirroring effect.
Step 1. 10ml of silver nitrate 0.1m
Step 2. Add drops of sodium hydroxide 0.4m to form precipitate of silver oxide?
Step 3. Add drops of ammonia 1.0m till clear
Step 4. Add 1g household sugar
Step 5. Heat using paint stripper heat gun < 600 degrees Celsius.
------------------------------------
Is it because i am using household sugar instead of pure glucose?
Can you see an error in my method or mixing measures?
I have seen that using a sensitiser such as tin(II)chloride stabilised in hydrochloric acid can help speed up the process, which is my next step after first carrying out the test successfully.
how can mirrors be real if our eyes arent real
lmao you think /sci/ is actually about science
I have a box of iodised table salt which contains 40–60 miligrams of potassium iodate per kilogram of salt. How can I separate a potassium salt from this mixture? (It doesn’t matter whether the potassium iodate is preserved; I just want to isolate any potassium salt.) Any means of separation are OK, be they chemical or physical. Can you help me please?
Shameless self-bump
The melting point of KIO3 is lower than that of NaCl. You might be able to separate it this way.
>>8563513
Okay, I hope this might work.
>Euclid is outdated
>>8563156
>yoo-clid
>>8563156
>I will read a 500 year old book with no rigor, no content and grave errors just to feel smart
>>8563156
His methods of proving propositions are very impractical, especially beyond book 5 of his elements
>lebesgue measure on space of all paths
>translation invariant and σ-finite lebesgue measures on infinite dimensional vector spaces exist
lol, why do they call it path integration when brainlet integration is a much more appropriate name?
kek, math fags still can't understand why QFT works. keep on masturbating about prime numbers and finite groups tho
>>8563069
Yet physlettes get "perturbed" s when you add a T to their QFT.
>>8563526
>QFTT
?
Best intro book recommendations please. (Pure math fag here so plz no CS style books)
>>8562159
What is category theory though?
basic category theory - leinster
simmons - an introduction to category theory
>>8562162
I used to wonder the same thing. Here you go.
http://rs.io/why-category-theory-matters/