x
Click to expand
What do you think? Give us your opinion. Anonymous comments allowed.
#4690 - anon (06/19/2015) [-]
what exactly entalpy is? I know that H=U+pV but what does that mean? no nextbook is explaining it. they just have this equation and that is all.
User avatar #4688 - zonetransferrer (06/19/2015) [-]
someone say something to motivate me to study for i cant bring myself to open thah textbook.......
User avatar #4691 to #4688 - whoozy (06/20/2015) [-]
If you do it now you won't have to later
#4681 - sineztro (06/18/2015) [-]
Hey can anyone tell me what this molecule is called its the circled one
User avatar #4674 - leightonsolomon (06/18/2015) [-]
This is what I have been working on for a month or two. I used Neil DeGrasse Tysons voice. I thought yall would appreciate it.
Dream of Tomorrow - L13S
User avatar #4680 to #4674 - raeptiemx (06/18/2015) [-]
looks good
User avatar #4672 - zonetransferrer (06/17/2015) [-]
anybody down for explaining operations with vectors? addition, multicipation, etc...
#4673 to #4672 - smudgiemuffins ONLINE (06/18/2015) [-]
I don't mean to be rude and redirect you, but the question is broad. I suggest going to
www.khanacademy.org/math/linear-algebra/vectors_and_spaces
and doing that first section. This technically references a higher level college class, but don't be intimidated, this first section is very much review. If you have more specific questions, I can answer.

What I think you might benefit from having explained to you is dot and cross products. Yet, the topic is still broad. Can I suggest that you peek around youtube for videos on the subject or skim wikipedia and come back with a more specific question as to what you don't understand about them? They aren't hard, really, just a bit weird the first time.
User avatar #4675 to #4673 - zonetransferrer (06/18/2015) [-]
thanks, I have learned vectors before but I always forget the way they are operated. And now exam from physical chemistry is coming and i need to know it for calculation of movement of gas molecules, and number of collisons with the surrounding case ( which is just pressure), thanks again
#4667 - phanactssonjoe (06/16/2015) [-]
how do i counteract the numbing stuff from the dentist so i can drink something
User avatar #4671 to #4667 - sugoi (06/17/2015) [-]
Exercising
User avatar #4670 to #4667 - whoozy (06/17/2015) [-]
Try a straw.
#4664 - zanntaggerung (06/15/2015) [-]
Great news that the comet lander finally woke up. I was a little disappointed when it landed all those months ago and the only result was a big argument over a shirt.
User avatar #4663 - trollofhalo ONLINE (06/14/2015) [-]
11th Grade Physics Help?!
End of the semester, final project was to make a car. Car was made using elastic energy to power the back/front wheels to make the car move. I need to find the equation for the transformation of Elastic Potential energy (Fe = KX, Ee = 1/2 KX ^ 2) to Kinetic Energy (1/2 mv ^ 2), but don't know what the equation is supposed to be?
#4665 to #4663 - smudgiemuffins ONLINE (06/15/2015) [-]
Hopefully this diagram helps explain spring forces and elastic potential energy a little bit better for you. Apologies that it's a bit rough.
User avatar #4666 to #4665 - trollofhalo ONLINE (06/15/2015) [-]
Thanks. I only now realize what "energy transformation" is. You've helped a lot! Thank you!
User avatar #4661 - billybeee (06/14/2015) [-]
If you go unconscious, you die.

Looking for a discussion / opinion on this.

Lets say you create a clone of yourself - atom for atom. Both you and the clone have identical memories, thoughts, feelings desires, etc - including the memory of creating the clone. Now imagine that you kill yourself. The clone takes your place in society, thinking it is the original you and goes on with its life. But in reality it was born a few minutes ago, and is not really the original you. So to summarize: there are two identical bodies, and two streams of consciousness that exist in them at the same time (until you kill yourself of course)

Now lets say you hit your head and you knock yourself out - you go unconscious. Your stream of consciousness is broken. Assuming what we call "unconscious" really means you are physically unconscious, now imagine your body wakes up. A new stream of consciousness begins. Is it really you waking up, or is it a new conscious entity that lives in your body, that believes it is you, but was really born the moment your body woke up? So to summarize: In this example - there is one body, but two streams of consciousness that exist in the body at separate times.

What do you think? If you truly go unconscious, do you die?
User avatar #4713 to #4661 - hatersghate (06/27/2015) [-]
en.m.wikipedia.org/wiki/Ship_of_Theseus


"Plutarch thus questions whether the ship would remain the same if it were entirely replaced, piece by piece. Centuries later, the philosopher Thomas Hobbes introduced a further puzzle, wondering what would happen if the original planks were gathered up after they were replaced, and used to build a second ship. Hobbes asked which ship, if either, would be considered the original Ship of Theseus."
User avatar #4715 to #4713 - billybeee (06/27/2015) [-]
not exactly what I was getting at... I guess it could transfer over to if you were able to upload your mind to a computer. Unless it's done somehow slowly and gradually it wouldn't be you anymore once it was uploaded
User avatar #4676 to #4661 - supahsayin (06/18/2015) [-]
I think of personal consciousness as a saved game.
You have had all that shit happen, you can make copies where all that shit has happened, but once one of those two saves are deleted, that particular save(memories, consciousness) is gone.
User avatar #4677 to #4676 - billybeee (06/18/2015) [-]
what do you think about the "you die if you go unconscious" thing?
User avatar #4679 to #4677 - supahsayin (06/18/2015) [-]
I feel it's more of a pause, than me dying forever. I remember the period before I feel asleep, and I'm conscious after the fact
User avatar #4668 to #4661 - leightonsolomon (06/17/2015) [-]
I see what you're saying, but for all intensive purposes most people would just consider death when all neurons stop firing in the brain. Being unconscious is probably what its like to be dead, but your body is still alive along with brain so I wouldnt really say it's the same.
User avatar #4669 to #4668 - billybeee (06/17/2015) [-]
What I was trying propose is: waking up from being unconscious is indistinguishable from killing yourself and letting a clone of you take your place in society
User avatar #4678 to #4669 - ohhh ONLINE (06/18/2015) [-]
Even if you get knocked there are still things firing in the brain. You are still there. Just knocked out. What you're are saying is like saying if i turn a PC off and back on will the programs in it technically be different? The answer is no. IF all brain function, "you" in a sense, did stop. Than you're brain dead. The human brain is an abyss of data, trillions to quadrillions of synapses, hundreds of billions of neurons. And much more, something is always firing unless something makes you completely brain dead.
User avatar #4683 to #4678 - billybeee (06/19/2015) [-]
What i'm saying is nothing like your computer example. With a computer, the hardware and software is still there. It continues where it left off once it is turned back on.

Just like the computer, when a human wakes up from being unconscious, the body also starts off where it left off so to speak, since your memories and feelings etc are still just neural connections. But the difference comes from the fact that there is a new state of consciousness when you wake up. Turning the computer on and off is the same as cloning yourself atom for atom, and then killing yourself and letting the clone take your place. When the clone wakes up, it will believe it is you, it continues where you left off, but it is an entire new entity.

Im no expert in neuroscience, but I know that the majority of brain function is only present in the evolutionary older part of the brain when you are unconscious. Which is of course responsible for breathing, heart rate, etc. AKA what are unconscious and lower level functions to begin with.

If what we call "unconscious" is true to its definition, then when you wake up it is an entire new stream of consciousness that is present. which is analogous to creating the clone that is identical to you then killing yourself, letting the clone take your place
User avatar #4684 to #4683 - ohhh ONLINE (06/19/2015) [-]
Honestly i don't know what you mean by "Knew stream of consciousness". Because it's not recognized by any branch of science i know. It's still you, same stuff, same everything. You can change, sure, but it will always be you.
User avatar #4686 to #4684 - billybeee (06/19/2015) [-]
Lets say you create a clone of yourself. It is identical to you, atom for atom. Both you and the clone have the memory of creating the clone.

For a moment in time that clone is exactly identical to you. It has the same stuff, and the same everything. Both you and the clone would be unable to determine which one of you were the original you. You both believe you are 20 years old, when in reality one of you is a few minutes old.

So would you agree that that clone is an entire different conscious entity than you, even though it has the same memories, feelings, thoughts, stuff, everything, as you?
User avatar #4687 to #4686 - ohhh ONLINE (06/19/2015) [-]
Oh i think i see what you are getting at. Truth is no one knows what consciousness is. Is it perception, is it all those neurons and synapses, is it simply the info of which those hold and they are the medium of which we express ourselves through? Is it all of that? Who knows. Isn't consciousness waves? Much like brainwaves? I don't know. I think consciousness is info, i think the data is you. An that data you compile is constantly being transferred rather than copied. I view it as sending a game to someone over the internet, not copying it than sending it, but just sending the game. It's still the same game. Just a different "Medium" for it to be "expressed through".
0
#4685 to #4684 - billybeee has deleted their comment [-]
0
#4682 to #4678 - billybeee has deleted their comment [-]
#4660 - anon (06/14/2015) [-]
Why autism is not real
www.youtube.com/watch?v=ZBqedEda2Ek
User avatar #4662 to #4660 - raeptiemx (06/14/2015) [-]
that was the king of /autism/ he's trying to cover up the existence of the board
#4658 - anon (06/12/2015) [-]
Is this true for most of them? Like Chalcopyrite?
User avatar #4659 to #4658 - unforgivenfive (06/13/2015) [-]
no. there are a bunch of stones that look like semi precious crystals that are sold as such though.

the stone you mentioned isnt as well as known as lets say a quartz/amethyst/citirine (which are ALL quartz anyway)
0
#4657 - headlessmamii has deleted their comment [-]
User avatar #4655 - sideism (06/10/2015) [-]
I know this may seem like an autisitic question, but can you effectively knock down or knockout a person in armor using just your bare hands/feet in real life?
User avatar #4656 to #4655 - sugoi (06/11/2015) [-]
Depends on the armor.
Give em a concussion and it's all good, punch em just right in the head and they're down. Depending on how heavy the armor is you could probably trip em up and get them on the floor quite easily.
We talking ballistic vest or fucking medieval all up in this bitch?
User avatar #4654 - alekksandar (06/10/2015) [-]
do kids explode if they eat too much chocolate, /science/ ?
User avatar #4644 - loltrosity ONLINE (06/08/2015) [-]
I need help /science/

In my apartment the AC barely works and in the summer it gets around 87 F in most of my place, and the landlord hasn't bothered to do shit. Anyone here know of any ideas to use like thermodynamics or something to lower the temperature?
User avatar #4689 to #4644 - magicalsteve (06/19/2015) [-]
Idk about thermodynamics but if you use a regular fan and put like a wet washcloth on the back of it then it cools the room down incredibly well
User avatar #4646 to #4644 - abbieru ONLINE (06/09/2015) [-]
You need an energy input to move heat around and make it cooler

Either repair the AC or get a fan.
Also puting something damp in front of the AC might work
User avatar #4645 to #4644 - skoldpaddacommala ONLINE (06/08/2015) [-]
Get a portable swamp cooler if it's a mostly dry heat.
Or take the less science-y route and threaten to sue your landlord cause that's his/her fucking job. Don't take their shit!
User avatar #4643 - shaunata (06/07/2015) [-]
which trees put out more oxygen? Conifers or deciduous trees?
User avatar #4649 to #4643 - nimba (06/09/2015) [-]
Per tree or sum total for either population?
User avatar #4650 to #4649 - shaunata (06/09/2015) [-]
Lets say, One conifer tree vs one deciduous. Say you wanted to cut down on green house gasses, so I guess really, my question is What absorbs the most CO2, and what releases the most O2 biproduct.
User avatar #4651 to #4650 - nimba (06/09/2015) [-]
Two approaches I can think of; mathematically and experimentally. The mathematic solution requires a heap of assumptions that wouldn't make a great deal of sense and the experimental would require a lot more effort but still makes an assumption about what you consider typical of each category.
a) figure out the average chloroplast content per photosynthetic cell from either
b) from there work out the average number of chloroplasts per average tree of each category with the idea that more chloroplasts = more O2
c) give up because it requires so many assumptions that it's meaningless

You'd have to come up with the 'average' size tree of each category.
Experimentally you could do a submerged bubble test to collect and measure oxygen output. Obiously submerging a whole tree would be problematic let alone enough to make a good experiment but saplings or cuttings could suffice. Find the average output per leaf of each category, multiply by the average number of leaves on a mature tree and compare.
User avatar #4642 - zonetransferrer (06/07/2015) [-]
what are your thoughts about wollfram mathematica and matlab? what are the main differencies and wich one would you rather choose? i had some lectures about wolfram but didn't gave me much other than interest. is it good idea to go to group tutorials rather than selflearning? And at the end, what do you think about TeX, is it necessary to know how to use it for advance in studies and beeing competent student / worker?
#4623 - bwiedieter (06/06/2015) [-]
If anyone who is proficient in Chemistry reads this, I´d appreciate a little bit of your time.   
See comment >>#4612. I´ve been wondering this for quite some time now, and i can´t find a solution.   
Thanks, bros!
If anyone who is proficient in Chemistry reads this, I´d appreciate a little bit of your time.
See comment >>#4612. I´ve been wondering this for quite some time now, and i can´t find a solution.
Thanks, bros!
#4617 - minibeep (06/05/2015) [-]
just like some dogs are smarter than other dogs
white people are smarter than gorillas
User avatar #4615 - trenchman (06/04/2015) [-]
Hey guys, just a little backstory, and then a few questions:
I'm currently finishing up Sophomore year at UCSD as a Political Science/Public Law major (school provided if anyone wants to take a look at the CompSci Minor and Major requirements to better pass judgement on the questions below), and had originally planned to study law. Having seen the horrific job prospects in that industry, though, I decided to take the intro level Comp Sci class (CSE11) and enjoyed it quite a lot. That being said, I am considering moving towards a Comp Sci minor or even a double major. I have yet to start the mathematics series required, but will take it along with everything else.
My questions are the following:
-Would a PoliSci major with a CompSci minor (mathematics included) and demonstrated private interest (e.g., a github account full of personal projects) be able to get into the industry as a low-level code monkey or other software developer?
-If this is possible, what do you recommend I do to really beef up my prospects of being noticed and employed?
-If a minor is not enough, is it worth taking another year at university (making it five years total) to get that double major?
-My parents, who are financing around half of my tuition (the other half being financial aid) don't believe this is a smart move and are strongly urging me to "play to my strengths" of writing and speech and go to Law School. How could I potentially win an argument with them about the usefulness of CompSci and convince them that the extra workload and time would be worth it (this question hinges mainly on it being a major, if that's necessary)?
-Finally, what topics/concepts do you recommend studying on the side to improve my employability?
I've been in a bad place this past week or so, thinking about my future and how to make myself marketable. I don't care about being a big shot or rich, but merely paying the bills and living my life.
All answers- even sarcastic or negative ones- are appreciated. You guys rock!
User avatar #4635 to #4615 - nought (06/06/2015) [-]
personally I would not like law people working in comp sci, judging by how they act only do it if you love it
#4624 to #4615 - anon (06/06/2015) [-]
where are you from? hod does your school system works? beacause i undestand none of it. and for your question which i don't remember already, at the end of high school i was convinced do become a director, but i had no film and no one to shot it with so i decided to go on movie history and theathre histor. but after thinking it out i ended up at chemistry university. i known nothing and at high school did not pay attention but i made it to the end of 2nd year. And even if this may sound egoistic, i think i am better than some who studied sciences more than me, lot of theese people cant get through 2nd year and still has some unfinished classes from first year. just bite your tounge and go hard. and if you are shy to ask something like i am most of the times, remember what you wanted to know and then do research on your own. believe me, you will get to the right answer. But sometimes i have depressions ( only sometimes ) and i long for movie making and studying that shit, now i don't have time for it but i plan to do something about it cause it eats me.
 Friends (0)