Anonymous comments allowed.
#4378 - anon (03/27/2015) [-]
help pls?
User avatar #4384 to #4378 - nimba (03/29/2015) [-]
you have red lines over your words there
User avatar #4381 to #4378 - berengar (03/28/2015) [-]
Make it bigger, then will talk, but considering this is an anon, unless you come back, you ain't looking for or getting an answer.
User avatar #4380 to #4378 - sugoi (03/28/2015) [-]
The fuck am I looking at here?
Did you fucking take a thumbnail or some shit?
User avatar #4371 - mynameisnotmike (03/24/2015) [-]
bill nye is gay
#4372 to #4371 - skoldpaddacommala (03/25/2015) [-]
gay for science
gay for science
User avatar #4367 - bminous (03/24/2015) [-]
Anybody got any good (scientific) sources that suggest that being gay isn't a "choice"
User avatar #4369 to #4367 - kanadetenshi ONLINE (03/24/2015) [-]
Epigenetic factor for homosexuality:

Heterosexual and homosexual men found to have difference in scents of attraction

Gay men and straight women have very similar neurological characteristics which could explain how gay men have an attraction to men which is normally a female trait.

There's a lot more. But overall it's still pretty complex.
#4365 - anon (03/24/2015) [-]
There's no math board, but maybe people here can help me real quick.
What does this mean? I can't find an answer online or in my textboook.
User avatar #4366 to #4365 - bminous (03/24/2015) [-]
It's a function, most like y(x), which is a function y that is dependent upon x. y(0) is the value of the function y when the input, x, is 0. So, it's saying that when the input to the function is 0, y is equal to 1.
User avatar #4368 to #4366 - evilpotato (03/24/2015) [-]
That works, thank you.
#4364 - phanactssonjoe (03/24/2015) [-]
how come b.o. smells bad to others but could smell good to the person? shouldnt you have more pheromones in that area you dont wash or did we get so used to clean smells that it cancels it out
User avatar #4481 to #4364 - Lolinator (04/27/2015) [-]
your username lies. no science for you. .... and maybe take a shower.
User avatar #4357 - nimba (03/23/2015) [-]
Opinions on alternative medicine?
1) acupuncture
2) chiropractic
3) naturopaths
4) holistic (mind and body)
5) religious healings, exorcisms, laying on of hands
6) biofield therapies (crystals etc)
User avatar #4370 to #4357 - kanadetenshi ONLINE (03/24/2015) [-]
1. Psuedoscience
2. Can be useful to relief stress, knots and migraine
3. Pseudoscience
4. Psuedo scientific method
5. Definitely pseudoscience
6. Pseudoscience
User avatar #4362 to #4357 - coronus (03/23/2015) [-]
1.) generally uses mildly neuroactive compounds, which can relieve pain and some somatic symptoms of stress through mild to moderate stimulation. additional placebo and placebo like effects likely apply to patients aware of eastern mystical views on the practice. so, selectively useful.

2.) Useful for muscular, mild neuromotor, and some skeletal maladies. Potentially deadly for spinal injury and ailment. virtually useless otherwise.

3.) useful for mild issues, though probably only dietary ones, since synthesized medicine is specifically targeted and potently designed to slolve problems nature and the immune system are struggling to heal.

4.) Useful in conjunction with modern methods; a healthy body with an ailing mind quickly falls to disrepair.

5.) Apart from a real demonic infestation/ possession, categorically proven to be useless. Wether or not such a thing still occurs, or ever has occured is debatable.

6.) ineffectualand largely based on pseudoscientific, inconclusive evidencies.
User avatar #4355 - hassium (03/22/2015) [-]
does medical marijuana relieve your stress
User avatar #4373 to #4355 - skoldpaddacommala (03/25/2015) [-]
I consumed quite a bit back in highschool. I didn't enjoy it much; mostly just trying to fit in at a new school.
I had a lot of anxiety back then and it usually made it worse more often than better. And this went on for a while, experimenting with indica, sativa, hybrids. Smoke, vapor, wax, edibles...It just isn't for me I guess. I'm cool with sticking to beer and video games as stress relievers.

I'd say try it, just to see how you react. Everyone's different.
User avatar #4358 to #4355 - coronus (03/23/2015) [-]
Since marijuanna activates certain neural pathways involved in the inhibition of pain and the dulling of certain senses tied heavily in to the fight or flight respose mechanisms, and causes the release of endorphins, yes.

However, it would be most advisable to use in small, minor to moderately imparing doses while working on or planning through the source of the stress; thus allowing you to both relive the symptoms and treat the problem.

There is one caveat, however. If you are at or below 23, I would strongly suggest limited use. Making a habit out of any neurologically active substance while the brain is still fine tuning its development is detrimental, and the THC pathways are far reaching in their influence; so much so that modifications in a developing brain can lead to permanent memory and attentional deficits.
User avatar #4359 to #4358 - hassium (03/23/2015) [-]
"if you are at or below 23,"

how much medical marijuana might i need, im at the teen age
User avatar #4360 to #4359 - coronus (03/23/2015) [-]
I'm not entirely sure, as my knowledge lies mostly in the spectrum of research, rather than diagnosis.

However, I know from personal experience and conversations with people I'veworked with at crisis hotlines, hospitals, andcounseling centers that a lot can be achieved just be getting a good night's sleep and a half hour or more of exercise every day.

Sleep imbalance, as evidenced by current researchers in sleep cycles and disruption my girlfriend worked in thelab ofone of the lead researcher in the world on the subject, long story, but I learned much fromthe papers and data she brought home is one of the largest factors in stress tolerance and coping. At your age, anything less than 8-10 hours a night is putting you at a deficit, which has a cumulative effect on mood and stress.

If those two are in place, the other factors that remain areunderlying neurophysiological conditions such as generalized anxiety disorder, dystymia, and depression, or environmental stressors, such as volatile relationships with friends or family, a lot of new responsibility, drastic life changes, and things like that.

If you fall in to the last category and wantto talk via private message, or any othe rmessage, I have some training in crisis and mediation work, and am willing to assist you in working through difficult situations, or at least surviving them with your mind intact. If I could survive a psychotic ex with suicidal tendencies and " a spot in her stomache she just really, really needs to but a knife in" ... amoung other things, I am relatively confident I can assist you.
User avatar #4361 to #4360 - hassium (03/23/2015) [-]
i see

i just wanted info is all, thanks

it's alright, i plan on trying medical marijuana at the adult age (18-22)
User avatar #4363 to #4361 - coronus (03/23/2015) [-]
Sounds like a decent plan. Glad I could help!
User avatar #4351 - diobrandolover (03/22/2015) [-]
Can someone explain to as to why jetfuel can't melt steel beams?

Yes I am serious.
User avatar #4356 to #4351 - xsnowshark ONLINE (03/23/2015) [-]
It doesn't released enough energy through combustion to melt the beams, BUT it does release enough to change their effective strength and rigidity.

So basically you have beams that will buckle and/or deform at smaller loads. The twin towers suffered from buckling once the steel structure was heated, as an example.
User avatar #4352 to #4351 - sugoi (03/22/2015) [-]
If jet fuel could melt steel beams, why don't the jets melt?
User avatar #4353 to #4352 - johnylingo (03/22/2015) [-]
what jets are you flyin in, made of steel beams?
User avatar #4350 to #4349 - sugoi (03/21/2015) [-]
What is that an egg yolk?
#4342 - twondai (03/18/2015) [-]
biologists, anatomists, whatever you're called, are there any huge inaccuracies in my model other than the size of the small intestine? doing this for a science project so it needs to be gud, but i'm too lazy to redo the whole small intestine
User avatar #4346 to #4342 - nimba (03/18/2015) [-]
uh the liver ought to be higher and more to the left, and it crosses on front of the aesophagus where the smaller lobe rests on front of the stomach. The large intestine is more... lobar and less bendy straw reticulation like you have here.
How come you've only got the GI tract + liver? What's the theme?
User avatar #4344 to #4342 - kanadetenshi ONLINE (03/18/2015) [-]
Is that green bit the galbladder?
User avatar #4345 to #4344 - twondai (03/18/2015) [-]
all the pictures i found showed it as a green thingy sticking out of the liver
User avatar #4329 - nimba (03/16/2015) [-]
Why can I see my breath in the cold but not my farts?
User avatar #4340 to #4329 - coronus (03/17/2015) [-]
What you see is condensing water vapor. Since farts are largely methane, which does not condense to a liquid quite as easily, you won't see them unless they're wet, nasty diarrhea farts with no clothing blocking the blast.
and that would be terrible
User avatar #4332 to #4329 - Awesomenessniss (03/17/2015) [-]
Your face is directly exposed to the outside air while your ass is blocked by your clothes, also as sugoi said you'd have to do a 360 Excorcist style.
User avatar #4331 to #4329 - sugoi (03/17/2015) [-]
Because you don't have eyes on your ass.
#4314 - ichitoten (03/15/2015) [-]
So im a bit stuck with graph theory, just seeing if any of you guys could maybe help me out

So the problem is : Playing chess, can a knight make every possible move on the 8x8 board before making the same move twice? then the question is repeated for a king and a rook
#4316 to #4314 - ichitoten (03/15/2015) [-]
Its fine y'all, i figured it out
#4312 - anormalmouse (03/15/2015) [-]
Hey /science/, I was just wondering whether the oxygen content in ice is less than that of water ? Is there a way to measure the oxygen content in different substances ? Sounds very much like a dumb question, yes I know. How can you have water molecules without oxygen atoms. But please, humor me. I think I'm on to something.   
 Gif unrelated
Hey /science/, I was just wondering whether the oxygen content in ice is less than that of water ? Is there a way to measure the oxygen content in different substances ? Sounds very much like a dumb question, yes I know. How can you have water molecules without oxygen atoms. But please, humor me. I think I'm on to something.
Gif unrelated
User avatar #4335 to #4312 - dudeheit (03/17/2015) [-]
Didn't read all comments but in generell you can determine the O2 amount in water by the "winkler-method"

User avatar #4339 to #4335 - anormalmouse (03/17/2015) [-]
User avatar #4341 to #4339 - dudeheit (03/17/2015) [-]
User avatar #4333 to #4312 - Awesomenessniss (03/17/2015) [-]
Looking at this thread I fear for your sanity. Water changing state is always a physical change, not chemical.
User avatar #4336 to #4333 - anormalmouse (03/17/2015) [-]
Is there a way to induce both changes at the same time with the influence of an outside force or substance?
User avatar #4337 to #4336 - Awesomenessniss (03/17/2015) [-]
Not in the way you seem to think there is. An water freezing into ice would in no way be able to break apart molecules, that's just madness.
#4338 to #4337 - anormalmouse (03/17/2015) [-]
If my curiosity is madness, so be it. That being said, I have limited knowledge on this topic and hence am asking on this here prestigious institution, so that i have at the very least a general guideline on what topics to read up on.
If my curiosity is madness, so be it. That being said, I have limited knowledge on this topic and hence am asking on this here prestigious institution, so that i have at the very least a general guideline on what topics to read up on.
User avatar #4318 to #4312 - truemox (03/16/2015) [-]
Possibly that water has oxygen in solution, and thatt some of that comes out of soultion when the water freezes (generally, as a liquid cools down, it holds less stuff dissolved in it).
User avatar #4320 to #4318 - anormalmouse (03/16/2015) [-]
That could be it.
User avatar #4313 to #4312 - sugoi (03/15/2015) [-]
Whats the question here? are you asking about air bubbles trapped in the ice or in the water that has become ice?

Because if it's the latter then well you know... basic maths.
H2 O
2H atoms and 1 Oxygen atom
66% Hydrogen 33% Oxygen

If it's the former then it varies between pieces of ice and you'll have to measure it manually, maybe by measuring it's weight before and after melting iunno.
User avatar #4315 to #4313 - anormalmouse (03/15/2015) [-]
When water starts freezing into ice, at about 4C up till it hits 0C, it starts expanding. I'm wondering whether a few molecules of water are split into hydrogen and oxygen and thus lowering the total oxygen content (and the the water quantity) in the ice during the time of the expansion. So when its melted back into water, you have a lesser quantity of water than what you started of with. My understanding of the air bubbles is quite limited though. Are they pockets of air that got trapped in the container while filling it or are they, in a manner of speaking, water vapour or are they impurites (minerals? I don't know.) of some kind in the water ?

Basically, Does freezing water into ice split the molecule into its components ?
#4325 to #4315 - nimba (03/16/2015) [-]
Water freezes in a lattice like this. Air can get trapped in this lattice depending on how fast it froze.   
Now whether there's more air in an ice lattice or dissolved in water I don't know.
Water freezes in a lattice like this. Air can get trapped in this lattice depending on how fast it froze.

Now whether there's more air in an ice lattice or dissolved in water I don't know.
User avatar #4327 to #4325 - nimba (03/16/2015) [-]
um if you deionise it without boiling it then test the pH. The pH may allow you to estimate the concentration of dissolved water. For the ice you could allow a known volume of water to thaw and collect the air released using a gas collecting syringe. Then test the pH of that water, deduce the quanitity of oxygen from the pH and add it to the gas collected.
That how I would try going about it but it's pretty dependent on the ion content of the water plus it assumes you can pick up the level of air dissolved in the water using a standard test - plus it would only give a picture of the relative air quantities, you'd have to estimate the oxygen content from that which I am not too familiar with.
#4334 to #4327 - anormalmouse (03/17/2015) [-]
Thanks, Every bit helps but clearly i have a lot of back study to do. At least i have an end goal now.
Thanks, Every bit helps but clearly i have a lot of back study to do. At least i have an end goal now.
User avatar #4328 to #4327 - nimba (03/16/2015) [-]
*not dissolved water, dissolved oxygen
User avatar #4326 to #4325 - anormalmouse (03/16/2015) [-]
Is there a way to measure the air content in both to compare results ?
User avatar #4317 to #4315 - sugoi (03/15/2015) [-]
I'm no scientist but I'm pretty sure the only way to separate them is through electrolysis.
Changing it's physical state doesn't do much except you know, change it's state.
User avatar #4319 to #4317 - anormalmouse (03/16/2015) [-]
What if you add pressure into the mix? Would that change the outcome in any manner?
User avatar #4321 to #4319 - sugoi (03/16/2015) [-]
You would just change at what temperature these changes occur.
User avatar #4322 to #4321 - anormalmouse (03/16/2015) [-]
So by increasing the pressure i would raise its freezing point or drop it ? And the opposite would happen if the pressure gets dropped I presume. mm That does beg the question though... How would water react to a vacuum ?
User avatar #4323 to #4322 - sugoi (03/16/2015) [-]
More pressure = require colder to freeze
Less pressure = require less cold to freeze

Refer to space.
Also you can check this out at home if you have a bottle of cola or any other carbonated drink really in your house. Take it out of the fridge and shake the fuck out of it then stick it in the freezer, DON'T TOUCH IT, and leave it for a few hours, maybe 2 or 3. Come back and that sucker will still be liquid but if you shake it a bit or open the lid it's start freezing instantly.

The shaking at first causes the CO2 gas to escape and increases the pressure in the bottle thus meaning the cola requires colder temperature to freeze and thus staying liquid in the freezer way past it's freezing point. When you open the bottle the gas escapes and the pressure drops so it's freezing point is normal again and the sucker freezes right before your eyes.
User avatar #4324 to #4323 - anormalmouse (03/16/2015) [-]
Thanks for clearing that up mate.
#4310 - cloakndagger (03/15/2015) [-]
Has science gone too far?
#4330 to #4310 - infernobird (03/17/2015) [-]
not far enough
User avatar #4311 to #4310 - sugoi (03/15/2015) [-]
We need to go deeper.
User avatar #4306 - obviousxplains (03/13/2015) [-]
Science people help youre the last place i can think to ask.
In 5th grade we watched this VHS in class about the three kinds of rocks, and it was this musical where there were three guys dressed like the rocks and it was really bad

im looking for that video. if anyone can help me ill really appreciate it

this guy on reddit was looking for it too, but no one answered and its from a year ago
#4295 - anon (03/12/2015) [-]
Hey all, I'm a long-term lurker of the site and I was wondering if there was anyone else who shares my passion for botany. It really would be wonderful if there is.
User avatar #4303 to #4295 - drastronomy (03/12/2015) [-]
I enjoy it, but am an amateur.
User avatar #4289 - dudeheit (03/11/2015) [-]
Can anyone help a poor biologist who struggles with biophysics because he doesn't know shit about physic in generel?
I try to translate the task as best as I can, I'm no native english-speaker.
So a fish has an average heat quantity of 2500 J which he releases per hour at the surrounding water which has a temperature of 10°C. At which rate does the entropy change over the course ov 4 hours? The answer is -35,3 J K^-1 but I have absolutly no clue how to calculate that shit ...
Thanks to everyone in advance
User avatar #4304 to #4289 - theuntakenusername (03/13/2015) [-]
Hi! I have some eperience with thermodynamics and you need the following formula:


Where S is entropy, T is temperature of the surroundings(10 C but you fill it in as 283 K) and dQ is the heat exchange. This heat exchange you fill in as 2500 J/hour * 4 hours = 10000 J.

So then 10000 J/283 K gives your answer. By the way, google is your friend in most of these cases
User avatar #4307 to #4304 - dudeheit (03/14/2015) [-]
Aw you are quite the man, thanks!
I did found that formula in my script and the internet but I couldn't figure out how I should put in the time, but as i look at it now, the "d" from "dQ" means over time or something like this, doesn't it?
Still If i divide 10000J / 283 K it equals +35 J / K and not - 35 J /K ?
User avatar #4308 to #4307 - theuntakenusername (03/14/2015) [-]
Sorry, I forgot to explain the minus, and it all depends for which system you have to calculate the entropy entropy . For the fish, its entropy will decrease because it releases energy, so a negative change. The surroundings will have an entropy change that is exactly the opposite.

So the final formula(when filled in) should be:

Sfish = -10000J / 283K = -35.3 J/K
#4309 to #4308 - dudeheit (03/14/2015) [-]
Damn thats total logical.Again thank you for your kind explanation!
User avatar #4287 - Izen (03/11/2015) [-]
So I'm writing a story and need some help,
What do y'all think aliens look like?
User avatar #4302 to #4287 - nimba (03/12/2015) [-]
like bacteria
User avatar #4277 - xgreenmaidenx (03/09/2015) [-]
What's the science behind homosexuality? How to you "turn" gay in the first place? Is it genetics, what is it?
I need to know for school, but Google and YouTube isn't helping. All I get is religious people trying to debunk everything scientists say about it.
And if you know any good websites I can read about it, then it would be extra helpful.
Thank you in before hand.
User avatar #4300 to #4277 - kanadetenshi ONLINE (03/12/2015) [-]
Look up some of the research done by Dick Swaab, probably one of the better studies done on it.
User avatar #4343 to #4300 - cognosceteipsum (03/18/2015) [-]
Heh. Dick.
User avatar #4298 to #4277 - phtholognyrrh (03/12/2015) [-]
it isnt a choice. beyond that there is too much "science" for both sides of the argument. it would seem that animals have a sexual orientation spectrum, where they exhibit more or less hetero or homo sex behaviors. in humans, however, social taboos make identification and research difficult.
User avatar #4291 to #4280 - nimba (03/11/2015) [-]
User avatar #4292 to #4291 - schnizel ONLINE (03/11/2015) [-]
Why are you laughing out loud?
User avatar #4293 to #4292 - nimba (03/11/2015) [-]
because of the joke thay guy made
User avatar #4294 to #4293 - schnizel ONLINE (03/11/2015) [-]
No, gays are completely normal people.
User avatar #4283 to #4280 - xgreenmaidenx (03/10/2015) [-]
I appreciate the contribution, but that's just a hypothesis made by some random dude on the Internet.
User avatar #4284 to #4283 - schnizel ONLINE (03/10/2015) [-]
But what is going to stop me beating up fags?
User avatar #4285 to #4284 - xgreenmaidenx (03/10/2015) [-]
The police.
User avatar #4286 to #4285 - schnizel ONLINE (03/10/2015) [-]
Darn it.
User avatar #4279 to #4277 - skoldpaddacommala (03/10/2015) [-]
Most likely a bit of both biological and environmental stimuli.

Make sure you use the references at the bottom and NOT the actual wiki articles
#4276 - anon (03/09/2015) [-]
Does math count as science? I hope so. I really really am having trouble with calculus. I'm typically pretty good at math but I am just not grasping this kind of stuff. There is one problem that I have to solve on the board in class and I really don't want to blow it.

Anyone here good at calculus and can walk me through this problem? And if all else fails just show me how its done?

Find derivative up to order three ( y prime, y prime 2, y prime 3)
y = radical(x+2)(x-3)

If my explanation of the question isnt clear please let me know.
THanks in advance!
User avatar #4299 to #4276 - phtholognyrrh (03/12/2015) [-]
science is watered down applied mathematics
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