Search found 21 matches

by gwself
Thu Oct 15, 2009 5:33 am UTC
Forum: Science
Topic: Chemistry question (peroxide vs. dioxide)
Replies: 29
Views: 5338

Re: Chemistry question

Thanks to both of you. Without knowing the structure of the compound, is there anyway to determine the naming standard? Say, by the type of elements involved, or something? Thanks again!
by gwself
Thu Oct 15, 2009 4:37 am UTC
Forum: Science
Topic: Chemistry question (peroxide vs. dioxide)
Replies: 29
Views: 5338

Chemistry question (peroxide vs. dioxide)

Hi, so I'm currently working on my chemistry homework, and although my question isn't specific to a particular problem, it is relevant to the work I'm doing. To cut to the chase, what is the difference between a peroxide and a dioxide? For instance, H2O2 and MgO2 are hydrogen peroxide and magnesium ...
by gwself
Mon May 12, 2008 2:41 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0037: "Hyphen"
Replies: 77
Views: 44575

Re: "Hyphen" discussion.

Today at work, my boss was looking over my shoulder and said:

"Look at that big-ass fucking bubble"

And the image of a big ass-fucking bubble pops into my head. I couldn't explain to my boss what I found so funny.

Thank you xkcd.
by gwself
Sat May 03, 2008 3:40 am UTC
Forum: Mathematics
Topic: Math II SAT Subject Test
Replies: 4
Views: 1729

Re: Math II SAT Subject Test

I get k = -6 If x-2 is a factor, then (x-2)(ax 2 +bx+c) = x 3 +kx 2 +12x-8, for some a, b, and c. If you expand the left hand side, and then combine like terms, you get ax 3 +(b-2a)x 2 +(c-2b)x-2c = x 3 +kx 2 +12x-8. Now you can match up the terms. ax 3 =x 3 , so a = 1. -2c = -8, so c = 4. And c-2b...
by gwself
Sat May 03, 2008 3:14 am UTC
Forum: Mathematics
Topic: Math II SAT Subject Test
Replies: 4
Views: 1729

Math II SAT Subject Test

Well, I'm taking it tomorrow. And today I decided I should probably actually look over the stuff that I'm supposed to know, and I appreciate any and all help anyone can give me. The main realization is that there's a lot of stuff that I haven't done in a long time, one of which being this factor div...
by gwself
Sun Mar 02, 2008 7:32 pm UTC
Forum: Mathematics
Topic: Solving Differential Equations
Replies: 13
Views: 1684

Re: Solving Differential Equations

In that case, he may not have realized that it required that method to solve.
by gwself
Sun Mar 02, 2008 6:37 pm UTC
Forum: Mathematics
Topic: Solving Differential Equations
Replies: 13
Views: 1684

Re: Solving Differential Equations

Thanks for the help. We actually haven't learned that yet, but sometimes he gives problems with stuff we haven't done yet just to see if we can figure it out. I guess we'll probably do that next week. Thanks!
by gwself
Sun Mar 02, 2008 4:30 pm UTC
Forum: Mathematics
Topic: Solving Differential Equations
Replies: 13
Views: 1684

Solving Differential Equations

Ok, so I realize you have to get the x's and the dx's on one side and the y's and dy's on the other, but it's just not working, so I feel like I may be missing something.

(x^2)*(dy/dx) - y = (2x^3)*e^(-1/x)

Thanks in advance for any help. :)
by gwself
Tue Nov 13, 2007 7:03 pm UTC
Forum: Science
Topic: A problem with heat conduction/convection
Replies: 3
Views: 1997

Re: A problem with heat conduction/convection

Sorry, for some reason I assumed everyone would know what I was talking about. I guess I thought they were common equations or something. Anyway, Pr is a (or the) Prandtl number, K is the thermal conductivity of air, and W is the width of the space. I'm not sure what a Reynolds number is, so if you ...
by gwself
Tue Nov 13, 2007 1:54 pm UTC
Forum: Science
Topic: A problem with heat conduction/convection
Replies: 3
Views: 1997

A problem with heat conduction/convection

Hi, I'm a junior in high school, taking a engineering course online via UVa. Our professor gave a problem but either I missed or he didn't explain thoroughly enough how heat conduction and convection are related. He gave an equation for heat flux: delta T/(R1 + R2 + R3...) and said the final units w...
by gwself
Wed Oct 31, 2007 5:52 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0336: "Priorities"
Replies: 141
Views: 27800

Re: "Priorities" Discussion

Does anyone else sometimes not do assignments because you know your grades would be high enough even if you don't do it? Haha, yeah, last year I calculated my grade in a principles of engineering course, and found out I could still get a low A even if I didn't do the final paper. Needless to say, I...
by gwself
Sun Oct 28, 2007 5:30 am UTC
Forum: General
Topic: Confessional Shed - I'll keep a look-out
Replies: 38049
Views: 2858202

Re: Confessional Thread

I like to believe I hold myself to a higher standard than I do the people around me.
Maybe I'm fooling myself?

Maybe that was more of a confession than the first one :P
by gwself
Sun Oct 28, 2007 5:20 am UTC
Forum: General
Topic: Confessional Shed - I'll keep a look-out
Replies: 38049
Views: 2858202

Re: Confessional Thread

Confession: I fit way too many of these: elitists, flamers, argumentative people, people who try to start fights, people who continue fighting pointless fights, conceited people, arrogant people, drug addicts, whores, people who don't take care of themselves, people who are obsessive about how they ...
by gwself
Sun Oct 28, 2007 5:09 am UTC
Forum: Music
Topic: What are you listening to?
Replies: 9563
Views: 1193378

Re: What are you listening to?

Summer Skin - Death Cab for Cutie
by gwself
Mon Oct 22, 2007 4:27 am UTC
Forum: Movies and TV Shows
Topic: Donnie Darko
Replies: 103
Views: 16291

Re: Donnie Darko

Wow... I didn't watch the commentary, but i still disagree. The book was supposed to help you see how Donnie was according to the book the Living Reciever. The movie showed evidence of that, and the book says .The Living Receiver is chosen to guide the Artifact into position for it's journey back t...
by gwself
Mon Oct 22, 2007 4:10 am UTC
Forum: Movies and TV Shows
Topic: Across The Universe
Replies: 14
Views: 2389

Re: Across The Universe

I just saw it yesterday, I really liked it. The only review I read was pretty accurate. It said it had great visuals and music, but really the story wasn't anything special. I can see what they were saying but when do musicals ever have good stories. Personally, i liked Singing in the Rain's story....
by gwself
Mon Oct 22, 2007 3:59 am UTC
Forum: Mathematics
Topic: Some basic calculus I'd love to have explained to me
Replies: 47
Views: 5517

Re: Some basic calculus I'd love to have explained to me

(really really big value = infinite) I think that was probably the most helpful for me. I got bits and pieces from different people, so thanks to everyone that replied. I think it just boggles my mind that when talking about a limit, you really only care about the really large values of x. By the w...
by gwself
Fri Oct 19, 2007 2:11 am UTC
Forum: Mathematics
Topic: Some basic calculus I'd love to have explained to me
Replies: 47
Views: 5517

Re: Some basic calculus I'd love to have explained to me

Haha, in my calculus book, there is a part called "precise definitions" but my teacher, who's quite competent, and knows his stuff, recommended that we skipped over them so as not to confuse ourselves.
by gwself
Fri Oct 19, 2007 1:59 am UTC
Forum: Mathematics
Topic: Some basic calculus I'd love to have explained to me
Replies: 47
Views: 5517

Re: Some basic calculus I'd love to have explained to me

So, isn't it basically the same thing as saying that there's no limit at all?
by gwself
Fri Oct 19, 2007 1:42 am UTC
Forum: Mathematics
Topic: Some basic calculus I'd love to have explained to me
Replies: 47
Views: 5517

Some basic calculus I'd love to have explained to me

Firstly, I saw no rule requiring a certain amount of posts before you could create a topic, and if I missed it, my apologies. Anyway, I'm a junior in high school and I'm taking my first calculus class, and I was wondering if I could get some help with some concepts dealing with limits that I don't q...
by gwself
Fri Oct 19, 2007 1:35 am UTC
Forum: General
Topic: Who the dickens are you?
Replies: 10922
Views: 2416515

Re: POST HERE FIRST - INTRO THREAD THE THIRD

My name's Greg. I'm a male in central Virginia, turning 17 in about a week. I've been reading XKCD for about a month, and decided a little while ago that the mathematics section could be a good place to get help on any calculus that I don't quite grasp. I enjoy food immensely. I'm currently eating c...

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