## Search found 20 matches

Wed May 20, 2009 12:10 pm UTC
Forum: Mathematics
Topic: Calculus: Integration problem
Replies: 25
Views: 2105

### Re: Calculus: Integration problem

achan1058 wrote:Maple says the above formula is correct, it is just 1/a.

Ahh, I see my mistake now. That makes sense.
Wed May 20, 2009 4:08 am UTC
Forum: Mathematics
Topic: Calculus: Integration problem
Replies: 25
Views: 2105

### Re: Calculus: Integration problem

theta4 wrote:$\int \frac{1}{a^2 + x^2}dx = \frac{1}{a}\textrm{arctan}\frac{x}{a} + C$

Shouldn't the a in the denominator of the coefficient of arctan be squared? Maybe I'm missing something.
Wed Apr 15, 2009 4:02 am UTC
Topic: 0569: "Borders"
Replies: 73
Views: 17225

### Re: "Borders" Discussion

Neither do I but I lolled nonetheless
Sat Mar 14, 2009 10:02 pm UTC
Forum: Science
Topic: Event Counter
Replies: 2
Views: 540

### Event Counter

I have a circuit kit that I'm putting together so that when a certain laser is broken an LED turns on briefly and a buzzer sounds. I want to make it so that I have a "scoreboard" that keeps track of and displays the number of times the laser is broken and can be reset. I've looked around o...
Tue Mar 10, 2009 1:42 pm UTC
Forum: Fit Club
Replies: 444
Views: 170485

### Re: The Official Running thread!

Grop wrote:
Mulus wrote:I hope to be running low 10's in the 3200 and 4:40's in the 1600.

Hi, what do these figures stand for? I have no idea.

Edit: Oh, probably minutes and meters.

Yea, you're right, minutes and meters. I Should've been more clear.
Tue Mar 10, 2009 3:06 am UTC
Forum: Music
Topic: Perfect Moments In Music
Replies: 396
Views: 195214

### Re: Perfect Moments In Music

Haven't looked through the thread to see if these have been posted. But two of my favorites: Bono does that whole Apartheid speech, then Am I bugging you? I don't mean to bug ya. Okay Egde, play the blues Then Edge goes into a sick riff. (From Silver and Gold off of Rattle and Hum). Also, the part i...
Tue Mar 10, 2009 2:56 am UTC
Forum: Music
Topic: Favorite bands of the 90s
Replies: 58
Views: 4531

### Re: Favorite bands of the 90s

Pearl Jam
Outkast(band?)
NIN
Faith No More
Beck
etc..

Then a handful of bands that have been fads for me (Weezer, Manic Street Preachers...)

I'm sure there're more that I just can't think of right now.
Tue Mar 10, 2009 2:51 am UTC
Forum: Fit Club
Replies: 444
Views: 170485

### Re: The Official Running thread!

I just started track last week and I'm feeling pretty good for not having trained with the team over the winter. I hope to be running low 10's in the 3200 and 4:40's in the 1600. Any other high school track athletes from Virginia?
Mon Mar 09, 2009 11:46 pm UTC
Forum: Fit Club
Replies: 8
Views: 1118

The difference between a treadmill and running outside is that outside, you have to 'cut' through the air as you run, but on a treadmill, the air isn't moving (relative to you). So it's as if the wind is blowing at your back at the same speed as you're running the whole way. They say you can balanc...
Mon Mar 09, 2009 12:20 am UTC
Forum: Mathematics
Replies: 159
Views: 21692

Actaeus wrote:
Mulus wrote:Existence

How so?
(That sort of thing is only interesting/thought-provoking if it says something. "existence is a paradox" is just nonsense)

By my possibly naive human interpretation "reality" either came from nothing or has always been. Is that not enough of a paradox?
Sun Mar 08, 2009 10:48 pm UTC
Forum: Mathematics
Replies: 159
Views: 21692

Existence
Sun Mar 08, 2009 7:19 am UTC
Forum: General
Topic: Thoughts for ships
Replies: 90166
Views: 8929821

### Re: Fleeting/Random/Thoughts (now with 20% more fungus!)

Why am I awake at 3:18...? I hate daylight savings
Sun Mar 08, 2009 6:25 am UTC
Forum: Fit Club
Replies: 8
Views: 1118

Depending on how cold it is where you live, I recommend you run outside instead.

Running on a treadmill for an hour a day will be incredibly boring (at least for me it is) and you might have trouble sticking with the program, but running outside can be very enjoyable.

Just a thought.
Sat Mar 07, 2009 4:36 am UTC
Forum: General
Topic: Thoughts for ships
Replies: 90166
Views: 8929821

### Re: Fleeting/Random/Thoughts (now with 20% more fungus!)

I have noticed that a lot of Asian people flash the peace sign when getting their picture taken.

Does anyone know why?
Thu Mar 05, 2009 5:13 am UTC
Forum: General
Topic: Blistering blue barnacles
Replies: 28601
Views: 3429671

[angry] FEMINIST POETRY HOMEWORK!!!! [\angry]

Sylvia Plath is a terrible person for leaving her two children behind to grow up without a mother just because she couldn't deal with her problems.

I hate her
Wed Mar 04, 2009 10:28 pm UTC
Forum: Science
Topic: Stern-Gerlach Experiment
Replies: 11
Views: 1949

### Re: Stern-Gerlach Experiment

The spin does not have a dipole length like normal dipoles. But it has a dipole moment µ (parallel or antiparallel to the magnetic field), and a force µ * dB/dz. So does this mean that an electron traveling through a magnetic field will be acted upon by a force perpendicular to it's velocity and th...
Tue Mar 03, 2009 1:33 am UTC
Forum: Science
Topic: Stern-Gerlach Experiment
Replies: 11
Views: 1949

### Re: Stern-Gerlach Experiment

Thanks for the help guys, So am I correct in thinking that once the particle enters the magnetic field it is deflected because the magnetic field is stronger on one end of the dipole than the other (inhomogeneous) thus the torque on that side is greater? Also, could someone clarify what exactly the ...
Fri Feb 20, 2009 11:27 pm UTC
Forum: Science
Topic: Stern-Gerlach Experiment
Replies: 11
Views: 1949

### Re: Stern-Gerlach Experiment

Ok, that makes sense as far as the way the particles move, thanks But I wanted to set it up so that after the electrons passed through the first magnetic field, the ones that were deflected a certain way would enter another magnetic field which was oriented differently. So I would then need to take ...
Fri Feb 20, 2009 5:14 pm UTC
Forum: Science
Topic: Stern-Gerlach Experiment
Replies: 11
Views: 1949

### Stern-Gerlach Experiment

I'm doing a research project about quantum mechanics and I may be in over my head. I have never taken a class or anything like that, I'm very much a beginner. I want to create a very simple computer model of something resembling the Stern-Gerlach experiment. So far, all I have is a system set up whe...
Fri Feb 20, 2009 5:01 pm UTC
Forum: General