Search found 40 matches

by funkytwinkie
Mon Jan 03, 2011 7:14 pm UTC
Forum: Science
Topic: Computational chemists with C++: particles in a box problem!
Replies: 13
Views: 2155

Re: Computational chemists with C++: particles in a box prob

Thanks for all your help! Actually my PI just came in and simplified everything for me. As I am only an undergraduate and have little experience with computational chemistry in general, he only wanted me to find the potential energy of the static system. No need to set random velocity, etc to find k...
by funkytwinkie
Fri Dec 31, 2010 9:07 pm UTC
Forum: Science
Topic: Computational chemists with C++: particles in a box problem!
Replies: 13
Views: 2155

Re: Computational chemists with C++: particles in a box prob

It might help to be more specific about what exactly you are trying to do. Ultimately, what are you trying to simulate? If you are using Lennard-Jones, I assume you have particles interacting via some sort of dipole-dipole interaction + hard-core repulsion? Is this supposed to be simply a gas of pa...
by funkytwinkie
Fri Dec 31, 2010 4:25 am UTC
Forum: Computer Science
Topic: Quick question: C++ file output from user-inputted results
Replies: 7
Views: 1596

Re: Quick question: C++ file output from user-inputted resul

Edit: If you want what I think you want (sorry if I'm just confused), it's pretty easy to do, so I just did it for you. That's...What she said? Er yeah, I think that works! NOW I see what you meant by the myFile things. Though when I tried to run it, my terminal says bash: ./loop2: Permission denie...
by funkytwinkie
Fri Dec 31, 2010 4:01 am UTC
Forum: Computer Science
Topic: Quick question: C++ file output from user-inputted results
Replies: 7
Views: 1596

Re: Quick question: C++ file output from user-inputted resul

No, I just want my output to be written on the new "initial.xyz" file that I can form, using C++ command. Namely, let's say I put in all the variables (# of particles per unit box, length, width and height of unit box, etc) and I opted for 108 particles. When I put this through the termina...
by funkytwinkie
Fri Dec 31, 2010 3:05 am UTC
Forum: Computer Science
Topic: Quick question: C++ file output from user-inputted results
Replies: 7
Views: 1596

Re: Quick question: C++ file output from user-inputted resul

That is helping a little bit, though I wish if you could be a bit more clear on where you've designated that my current function begins and ends. Does it begin at user input? or at start of loop? The point of all this is when I run it on the compiler, I will have input my number of particles, unit c...
by funkytwinkie
Fri Dec 31, 2010 1:38 am UTC
Forum: Science
Topic: Computational chemists with C++: particles in a box problem!
Replies: 13
Views: 2155

Re: Computational chemists with C++: particles in a box prob

Charlie! You are not helping!

Though that is an interesting question...
by funkytwinkie
Fri Dec 31, 2010 12:40 am UTC
Forum: Computer Science
Topic: Quick question: C++ file output from user-inputted results
Replies: 7
Views: 1596

Quick question: C++ file output from user-inputted results

Hi, So I've devised a program where I ask the user to put in the following; USER INPUT: number of particle per unit cube: (we'll say 4) length of x of unit cube: (1) length of y of unit cube: (1) length of z of unit cube: (1) multiplication factor: (3) (NB: numbers in brackets are variable-- I only ...
by funkytwinkie
Fri Dec 31, 2010 12:00 am UTC
Forum: Science
Topic: Computational chemists with C++: particles in a box problem!
Replies: 13
Views: 2155

Computational chemists with C++: particles in a box problem!

Hi, Sorry for the awfully long title! Here's my problem. I'm a third year chemistry major. I took physical chemistry second and third year-- I did fairly well in both of them. So I thought I would take well to a computational chemistry lab research project, led by my third year physical chemistry pr...
by funkytwinkie
Fri Sep 04, 2009 1:44 am UTC
Forum: Fit Club
Topic: For once, I want to be fit.
Replies: 14
Views: 2980

Re: For once, I want to be fit.

Some details: 5'8 185 lbs 19 year old female hey AudeSapere, you are exactly my size! i had the same stats when i began exercising and doing all that goody goody healthy eating stuff back in May!!!! :D i am now 148lbs, i love the difference in how i look and feel nowadays (: what worked for me was ...
by funkytwinkie
Fri Sep 04, 2009 1:32 am UTC
Forum: Fit Club
Topic: Long distance Cycling
Replies: 43
Views: 7171

Re: Long distance Cycling

Does it seem reasonable to assume I can do 54 miles on a bike, given that I can walk 54 miles and cycling is much more efficient, or is that a dangerous game to play? hello i don't know much about "endurance", but i would probably advise building up from say, 10-20 miles at first (sounds ...
by funkytwinkie
Fri Sep 04, 2009 1:26 am UTC
Forum: Fit Club
Topic: The Official Running thread!
Replies: 444
Views: 176463

Re: The Official Running thread!

injury inquiry! i've been elliptical-ing and spinning all summer because my shin splint was bothering me. i have chinese herbal medicine patch on (which smells really bad right now, btw) and i got three acupuncture sessions in the recent past. thinking all this injury business was behind me, i went ...
by funkytwinkie
Fri Aug 21, 2009 9:21 pm UTC
Forum: Food
Topic: let's talk about soup.
Replies: 15
Views: 2749

Re: let's talk about soup.

Throw some potatoes, carrots, celery, and lean meat &/or beans into a slow cooker, shake in herbs and flavoring of choice, stew a few hours, and you've got a full meal! so i'm guessing there's no real "proportion" stuff that i need to worry about? also, should i invest in a big ol' po...
by funkytwinkie
Wed Aug 19, 2009 7:06 pm UTC
Forum: Food
Topic: let's talk about soup.
Replies: 15
Views: 2749

let's talk about soup.

helllooo! it's been a LONG time since I've been to the xkcd fora! feels good to be back :3 i've worked my ass off all summer and lost a GOOD deal of weight (35+ lbs, all my clothes fit now!) i am, however, afraid to gain it all back, so i am asking for a few easy, light-on-calorie recipes i can take...
by funkytwinkie
Sun May 24, 2009 4:16 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

mwahaha reviving the old dying thread >=)

yessss revival of the old dying thread for a feeble chemistry-inept mind! hi folks, it's been a while since i've been here. reviewing chemistry for the glorious mcat (not) nowadays, and i'm confused with the question booklet answer keys. if you could pitch in, that'd be great! (: 137. CHO | H3C-----...
by funkytwinkie
Sat Feb 14, 2009 12:49 am UTC
Forum: Serious Business
Topic: Trash?
Replies: 14
Views: 2854

Re: Trash?

And the law of conservation of mass doesn't really seem to be working right now anyways...the human race is growing exponentially, so the law is already 'disturbed'... What do you mean? I meant that currently, mass of 'stuff' growing/increasing on earth [birth of organisms] far outweighs [literally...
by funkytwinkie
Fri Feb 13, 2009 11:27 am UTC
Forum: Serious Business
Topic: Trash?
Replies: 14
Views: 2854

Trash?

This is sort of a silly question, but it's been on my mind forever...Here goes. We're attacking the environment. Big time. I don't need to mention all the global warming, strange weather conditions happening, et cetera et cetera. I was thinking...We have so much trash that we generate every day, and...
by funkytwinkie
Sun Dec 07, 2008 12:29 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

Yeah, that is sort of what I'm saying...sorry, I can't think acid base stuff right now...my brain is oozing of ochem reagents... And by the way.. I could do this, but I'm not sure what the equations are and how they work out and shit. I know you have like, some, shit, or something, and you have to a...
by funkytwinkie
Sat Dec 06, 2008 7:56 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

Well, I might as well be wrong...But then again, I might as well post my two cents =\ So I think this is where you can use your HH equation...I just went ahead and found the pKa for the nitrous acid on the internet, but I'm sure your book/reference sources would have a more accurate number...I got 3...
by funkytwinkie
Thu Dec 04, 2008 11:31 pm UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

Hi Tachyon, I followed AFedchuck's advice and it makes sense to me. PLUS I can show you with the ICE diagram, which you are familiar with... (well, I guess it depends whether or not my answer is correct?!) So here is your ICE diagram. I'm denoting propanoic acid as HA. HA (+ H+ from HCl) <==> H+ + A...
by funkytwinkie
Mon Nov 24, 2008 11:45 pm UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

pH = ? 0.13 M Na2CO3 CO32- + H2O --> HCO3- + OH - soooooooo Ka = 5.6*10^-4 .:. Kb = 1.79*10^-11 from ICE (x^2)/.13 = 1.79*10^-11 x= 1.52*10^-6 = OH- pOH= -log(oh-) = 5.82 pH = 8.18 Is this right? I have nothing to check my answer against because my book blows ass. As long as you used the correct Ka...
by funkytwinkie
Fri Nov 21, 2008 8:59 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

Haha. Same here. Prepare for an amazing array of chemistry questions!

(: I love this forum.
by funkytwinkie
Mon Nov 17, 2008 8:54 pm UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

Er...So how do we know what to use? Elimination or substitution?
by funkytwinkie
Mon Nov 17, 2008 8:32 pm UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

I JUST learned this, so I could very well be wrong (as I've proved myself as such in previous posts) One difference between Sn1 and Sn2 is that in Sn2, the reaction of nucleophile attacking and the leaving group..er..leaving, happens simultaneously. Hence it's called Sn"2", a bimolecular r...
by funkytwinkie
Mon Nov 17, 2008 4:22 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

How about an org chem question? [Haha! What now, Tachyon! I stole the attention away from you!] CH3-CH2-O-CH2-CH3 ==> CH3-CH(with O-OH on top of this C)-O-CH2-CH3 Apparently this happens in contact with air. Any thoughts on how this works (the mechanism?) I think this is a radical question. (har har...
by funkytwinkie
Mon Nov 10, 2008 5:37 pm UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

So how do you really define the equilibrium constant? (without spurting out equations of activity and concentrations-- I know the equation already) What is the physical meaning of K? K is just a ration between how much product and how much reactant you have once everything reaches a state where the...
by funkytwinkie
Mon Nov 10, 2008 7:31 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

Oh so the answer is dimensionless because of activity? That actually makes sense. I just started learning this so I'm working out lots of kinks as I go along. No, the answer is dimensionless because its a ratio of two quantities with the same units. If you wanted to, you could express K as a percen...
by funkytwinkie
Mon Nov 10, 2008 3:37 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

You would make my orgo professor cry (sorry). This is very important, and often very confusing for many people: Equilibrium is a thermodynamic concept. It is entirely unrelated* to the rate of a reaction. Kinetics uses the rate constant, which is not the same as the equilibrium constant. Ah, hopefu...
by funkytwinkie
Mon Nov 10, 2008 3:04 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

er...if you forcibly said that gases exist in mol/liter, then sure :? *grumbles* If they did not teach you the unit for gas in equilibrium constants, then the problem is posed kind of strangely-- if they really wanted you to realize that you have to find the values in bars, then they'd give you the ...
by funkytwinkie
Mon Nov 10, 2008 2:34 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

I don't want to discourage you, but the ability to visualize chirality and symmetry operations is not something easily learned. In my experience, people are either innately good at it or hopelessly lost. No amount of work will make 3D visualization feel natural if your head isn't already wired for ...
by funkytwinkie
Mon Nov 10, 2008 2:30 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

the equilibrium constant is dimensionless apparently because it's only a value that shows 'rate of reaction'-- hence called 'equilibrium constant ' D: It does say in my textbook that 'you must use units of molarity (M) for solutes and bars for gases . I think this is where your problem lies. All of ...
by funkytwinkie
Wed Nov 05, 2008 5:44 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

I mean fail. Not like 'Asian fail', like B (though I am Asian) Literally fail. Below fifty percent. I've never gotten anything below a 75 in my life. I've been having a hard time with symmetry and chirality that's presented in org chem and inorg chem. Yes, I know it's hard. I just gotta work harder,...
by funkytwinkie
Tue Nov 04, 2008 6:52 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

Fair enough. I'll take that comment as a sign of gratitude. (: Now it's a perfect time to give my spiel about chemistry. See, I fucking LOVE chemistry. I'm now a second year chem major. I got two of my midterms today-- one in inorganic, one in organic. I studied hard for both. I failed both. Miserab...
by funkytwinkie
Tue Nov 04, 2008 6:02 am UTC
Forum: Science
Topic: Are any of you chemists?
Replies: 129
Views: 17477

Re: Are any of you chemists?

my reasoning might be a little bit rusty, but here goes...let me know if it doesn't make sense? Mn + n(HCl) ==> m(H2) + MnCl(x) i don't know what my mole ratios are at this point, so they're denoted as n and m. (and x, of course, the ultimate unknown we're trying to solve for). 2.747g Mn/54.94g/mol ...
by funkytwinkie
Fri Apr 04, 2008 5:49 am UTC
Forum: General
Topic: Confessional Shed - I'll keep a look-out
Replies: 38049
Views: 2814089

Re: Confessional Thread - A black hole of emu

deepest and darkest? hmm. won't go that deep, but here's something. fact: i am a runner. albeit a slow one, but still a runner, methinks. confession: i absolutely hate, despise , my legs. specifically my thighs. i think they look disgusting. i wonder why i'm not like those marathoners, but then agai...
by funkytwinkie
Wed Mar 26, 2008 8:48 pm UTC
Forum: Mathematics
Topic: seemingly easy integral problem..
Replies: 7
Views: 1547

Re: seemingly easy integral problem..

ah! so i can just change the original question to sqrt (2+2sin(theta)), multiply by conjugates and i'd get sqrt (cos(x)^2) without the negative sign.

hooray!
by funkytwinkie
Tue Mar 25, 2008 3:38 am UTC
Forum: Mathematics
Topic: seemingly easy integral problem..
Replies: 7
Views: 1547

seemingly easy integral problem..

hi! i need to solve for this integral. integral of sqrt(2sin(theta)+2)) from limit 0 to 2pi. the textbook told me the answer was 8, but it never told me how to do it. i tried multiplying top and bottom by the conjugate root (sqrt(2sin(theta) - 2)) and then using u substitution as u = 2sin(theta) - 2...
by funkytwinkie
Fri Feb 29, 2008 8:57 pm UTC
Forum: School
Topic: You know you have to transfer when...
Replies: 7
Views: 2115

Re: You know you have to transfer when...

"Dearest Mother, Dearest Father, The thought of making any change to my quality of life, however positive and well-intentioned, without your approval, harrows my very soul. I feel, however, that the hurlyburly of life in the city is not sitting quietly with my education, and I would much prefe...
by funkytwinkie
Thu Feb 28, 2008 10:00 pm UTC
Forum: General
Topic: Who the dickens are you?
Replies: 10922
Views: 2378686

Re: INTRO THREAD THE THIRD

word up, homeslices. my name's ji yoon, i'm 20 years old. i go to school way up there...in canada. i go to mcgill university, and i'm in science. my interests include listening to music, going to the gym too much, and using my inability to pry myself away from my computer as an excuse to explore an...
by funkytwinkie
Thu Feb 28, 2008 6:21 pm UTC
Forum: General
Topic: Who the dickens are you?
Replies: 10922
Views: 2378686

Re: INTRO THREAD THE THIRD

word up, homeslices. my name's ji yoon, i'm 20 years old. i go to school way up there...in canada. i go to mcgill university, and i'm in science. my interests include listening to music, going to the gym too much, and using my inability to pry myself away from my computer as an excuse to explore and...
by funkytwinkie
Thu Feb 28, 2008 6:10 pm UTC
Forum: School
Topic: You know you have to transfer when...
Replies: 7
Views: 2115

You know you have to transfer when...

hi, newbie poster here. *waves* let's see how you smart people respond...;) I'm kind of stuck in the middle at the moment. I'm a first year student in a college heart of downtown. classes are alright, and the people are pretty cool. but I'm looking to transfer. it's something i've been thinking abou...

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