## Search found 80 matches

- Mon Oct 22, 2012 9:18 pm UTC
- Forum: Science
- Topic: Physics homework: Not sure I quite get free body diagrams
- Replies:
**5** - Views:
**2164**

### Re: Physics homework: Not sure I quite get free body diagram

Dopefish's advice worked. I solved the problem and a significant amount more, and I think I'm really starting to understand force interactions and free body diagrams a lot more now.

- Sun Oct 21, 2012 5:13 am UTC
- Forum: Science
- Topic: Physics homework: Not sure I quite get free body diagrams
- Replies:
**5** - Views:
**2164**

### Re: Physics homework: Not sure I quite get free body diagram

I probably should have mentioned: the problem asks you to draw 3 free body diagrams, one for each part. It also says to indicate which object is exerting which force. That is part A of the problem (parts B, C, and D were what I mentioned before) As for your advice, I'll let you know how it works for...

- Sun Oct 21, 2012 3:50 am UTC
- Forum: Science
- Topic: Physics homework: Not sure I quite get free body diagrams
- Replies:
**5** - Views:
**2164**

### Physics homework: Not sure I quite get free body diagrams

Since force and free body diagrams have been introduced in my college physics class, I've started to feel lost. After a fair bit of thinking and experimenting with the diagrams, I feel I have a slightly better understanding, but I still find it very confusing. In particular, there's one problem that...

- Sun Sep 09, 2012 5:30 pm UTC
- Forum: Comics/Graphic Novels
- Topic: MS Paint Adventures thread
- Replies:
**686** - Views:
**176369**

### Re: MS Paint Adventures thread

In case you haven't heard, PBS Idea Channel just did a video on Homestuck: http://www.youtube.com/watch?v=MLK7RI_HW-E

- Tue Mar 06, 2012 3:26 am UTC
- Forum: Mathematics
- Topic: Just what am I doing wrong here? (homework)
- Replies:
**14** - Views:
**2862**

### Re: Just what am I doing wrong here? (homework)

I figured out what the problem was. It had to be the natural log of the absolute value of x + 2.

- Mon Mar 05, 2012 6:23 am UTC
- Forum: Mathematics
- Topic: Just what am I doing wrong here? (homework)
- Replies:
**14** - Views:
**2862**

### Re: Just what am I doing wrong here? (homework)

Hmm. Must have been a mistake on the part of whoever put up the problem, then.

- Mon Mar 05, 2012 6:01 am UTC
- Forum: Mathematics
- Topic: Just what am I doing wrong here? (homework)
- Replies:
**14** - Views:
**2862**

### Just what am I doing wrong here? (homework)

So, I'm using an online submission system for calculus homework this quarter, and it gives you a number of tries on each problem and tells you whether you got it right each time you submit. I've been working on this one problem and I'm almost positive I have the right answer (I've double and triple ...

- Fri Jan 20, 2012 7:40 pm UTC
- Forum: Mathematics
- Topic: Help with sums
- Replies:
**4** - Views:
**1284**

### Help with sums

Can someone tell me how to solve a sum where k is raised to a constant power throughout the sum? For instance:

n = 50

(SIGMA) k^2

K = 1

I don't just want a formula. I want to know how the formula's derived.

Thanks in advance.

n = 50

(SIGMA) k^2

K = 1

I don't just want a formula. I want to know how the formula's derived.

Thanks in advance.

- Wed Aug 24, 2011 2:01 am UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### Re: You wake up in a forest...

Lorenz wrote:Run to frisbee, and place it on top of the green square.

Upon touching the green square, the Frisbee quadruples in size. The chain, realizing this, let go of your head and frantically slithers towards the green square.

- Mon Aug 22, 2011 4:51 am UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### Re: You wake up in a forest...

edit: whoops. Hit quote instead of edit.

- Mon Aug 22, 2011 4:47 am UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### Re: You wake up in a forest...

I take the frisbee and toss it towards the green square. http://img850.imageshack.us/img850/7127/chainattack2friz.png You toss the frisbee at the green square, but it falls short, in part because the frisbee's damaged, and in part because you are sidetracked by a homicidal chain. The chain, on the ...

- Mon Aug 22, 2011 4:29 am UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### Re: You wake up in a forest...

You didn't tell us what the blue thing in the smaller trash can is, but i take it anyway, plus the lid of the large trash can. Yes I did. Its a cracked Frisbee. But anyway, http://img171.imageshack.us/img171/6017/inventory2.png You add the Frisbee and the lid into your inventory... But wait a minut...

- Mon Aug 22, 2011 3:40 am UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### Re: You wake up in a forest...

Take the chain and open the smaller trash can

Well that's... interesting. You wonder who would bother going through all the trouble.

- Mon Aug 22, 2011 2:03 am UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### Re: You wake up in a forest...

Search trashcan for goodies! http://img508.imageshack.us/img508/7352/trashcancontents.png The trashcan is nearly empty, nonetheless, there are a few items in there that may or may not prove useful. There's a cracked Frisbee, a chain (who would throw out a perfectly good chain?) a rotten banana peel...

- Mon Aug 22, 2011 12:49 am UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### Re: You wake up in a forest...

ugh, these adventure games never last. The host always gets bored and gives up. Let's see how long this one lasts. http://img844.imageshack.us/img844/9094/optomismdrop5to4.png Your optimism drops from 5 to 4. Gather mud. http://img822.imageshack.us/img822/9770/inventory1l.png Looks like an earthwor...

- Sun Aug 21, 2011 9:58 pm UTC
- Forum: Forum Games
- Topic: You wake up in a forest...
- Replies:
**25** - Views:
**2637**

### You wake up in a forest...

http://img707.imageshack.us/img707/4773/youwakeupinaforest1.png You wake up in a forest. The moon is directly overhead. You don't remember going to sleep here. In fact, you don't remember anything at all... Well, okay, that's not exactly true... Actually, that's not true at all. You remember exactl...

- Sun Aug 21, 2011 8:06 am UTC
- Forum: Forum Games
- Topic: Get to the cookies
- Replies:
**3** - Views:
**793**

### Get to the cookies

The man in this picture is in a bit of a predicament. He really really wants cookies and milk, but the only cookies available are across a piranha-filled moat. To add to that, there are spikes on the ceiling, so the danger of attempting to jump across is increased tenfold. http://img685.imageshack.u...

- Thu Aug 11, 2011 4:21 am UTC
- Forum: Science
- Topic: Is the big bang really the beginning of time?
- Replies:
**38** - Views:
**4239**

### Re: Is the big bang really the beginning of time?

No, I've read about studies of the cosmic microwave background radiation that either confirmed or provided strong evidence for a mostly flat universe. Perhaps these studies are not as legitimate as I initially thought them to be? Edit: Nevermind about it not being legit. It's on NASA's page: http://...

- Wed Aug 10, 2011 5:37 pm UTC
- Forum: Science
- Topic: Is the big bang really the beginning of time?
- Replies:
**38** - Views:
**4239**

### Re: Is the big bang really the beginning of time?

One thing that confuses me is that there is currently evidence from the cosmic background radiation that suggests that the universe is almost completely flat. But the only way the universe could have finite space is if it has a closed curvature (unless space has some clearly-defined edge, but that r...

- Tue Aug 09, 2011 10:41 pm UTC
- Forum: Science
- Topic: Is the big bang really the beginning of time?
- Replies:
**38** - Views:
**4239**

### Re: Is the big bang really the beginning of time?

It is true we don't know: but to be honest, we don't know a lot that we "know". At the same time, we have pretty good models which do say that "before the big bang" is similar to "south of the south pole". We don't know that there isn't an invisible pink unicorn over y...

- Tue Aug 09, 2011 9:40 pm UTC
- Forum: Science
- Topic: Is the big bang really the beginning of time?
- Replies:
**38** - Views:
**4239**

### Re: Is the big bang really the beginning of time?

If instead of all universes being born of another universe, all universes arise spontaneously due to quantum fluctuations, I think the turtle problem can be averted since few or none of the universes are causally connected. You can have an infinite multiverse with infinite time and not have to deal ...

- Tue Aug 09, 2011 6:16 pm UTC
- Forum: Science
- Topic: Is the big bang really the beginning of time?
- Replies:
**38** - Views:
**4239**

### Re: Is the big bang really the beginning of time?

So will there be an end of time?

- Tue Aug 09, 2011 6:03 pm UTC
- Forum: Science
- Topic: Is the big bang really the beginning of time?
- Replies:
**38** - Views:
**4239**

### Re: Is the big bang really the beginning of time?

What the hell does that mean?

- Tue Aug 09, 2011 5:58 pm UTC
- Forum: Science
- Topic: Is the big bang really the beginning of time?
- Replies:
**38** - Views:
**4239**

### Is the big bang really the beginning of time?

I was watching an interview with Stephen Hawking recently. He said that saying there was time before the big bang was like searching for a point south of the south pole. Now, I know he's pretty much a genius and can probably give an excellent argument for such an idea, but the interviewer didn't pre...

- Sun Aug 07, 2011 6:18 pm UTC
- Forum: Mathematics
- Topic: Can you explain how Archemedes did it?
- Replies:
**5** - Views:
**1488**

### Can you explain how Archemedes did it?

According to the wikipedia article on pi: [Archimedes] realized that its magnitude can be bounded from below and above by inscribing circles in regular polygons and calculating the outer and inner polygons' respective perimeters: By using the equivalent of 96-sided polygons, he proved that 3\tfrac{1...

- Sun Jul 24, 2011 6:24 pm UTC
- Forum: Mathematics
- Topic: Just want to make sure I understand uncomputable numbers
- Replies:
**7** - Views:
**1965**

### Re: Just want to make sure I understand uncomputable numbers

I know that if this is a program, it will give a different number each time it was run, but in any given instance of it being run forever, would it approach an uncomputable number, given that it was truly random?

- Sun Jul 24, 2011 5:15 pm UTC
- Forum: Mathematics
- Topic: Just want to make sure I understand uncomputable numbers
- Replies:
**7** - Views:
**1965**

### Just want to make sure I understand uncomputable numbers

I think I'm beginning to understand how uncomputable numbers work, but I just want to make sure I'm not completely wrong. If I use an infinite series that would otherwise generate a computable number, but introduce a random element, it will approach an uncomputable number, right? For instance, if yo...

- Sun Jul 24, 2011 7:40 am UTC
- Forum: Mathematics
- Topic: A question on infinite series
- Replies:
**7** - Views:
**1870**

### Re: A question on infinite series

Oh wait. I think I understand now. I didn't really think it through. Sorry about that.

- Sun Jul 24, 2011 5:56 am UTC
- Forum: Mathematics
- Topic: A question on infinite series
- Replies:
**7** - Views:
**1870**

### Re: A question on infinite series

I don't understand. When I try to use rationals instead of naturals for a, I get stuff like this: .25/1.25 = 25/125 = 1/5 1 + 1 =/= 5 And of course, a = 0 doesn't work. When I use the formula, I start with a fraction, such as 1/4. Since the first number in the series is 3^0/(3+1)^1, it comes out to ...

- Sun Jul 24, 2011 4:11 am UTC
- Forum: Mathematics
- Topic: A question on infinite series
- Replies:
**7** - Views:
**1870**

### A question on infinite series

I watched one of Vihart's videos that talked about infinite series and brought up the problem of starting with a fraction, and finding an infinite series starting with said fraction that approaches 1. It presented a graphical way of solving this, but I wanted to know the regular way, so I checked Kh...

- Sat Jul 23, 2011 4:27 pm UTC
- Forum: Logic Puzzles
- Topic: Portal Paradox
- Replies:
**137** - Views:
**32680**

### Re: Portal Paradox

What interests me about portals is the interesting geometric possibilities they allow for, such as closed 1-sided and 2-sided polygons, and completely flat 1-sided mobius strips. Portal mathematics might be interesting.

- Fri Jul 22, 2011 8:16 pm UTC
- Forum: Forum Games
- Topic: Bad translator
- Replies:
**80** - Views:
**12450**

### Re: Bad translator

"Once upon a midnight dreary, while I pondered weak and weary, over many a quaint and curious volume of forgotten lore, while I nodded, nearly napping, suddenly there came a tapping, as of some one gently rapping, rapping at my chamber door." ...56 translations later we get: "Ametshok...

- Fri Jul 22, 2011 8:01 pm UTC
- Forum: Logic Puzzles
- Topic: Can you decode this?
- Replies:
**2** - Views:
**1558**

### Re: Can you decode this?

Wow. That was fast. Good work.

- Fri Jul 22, 2011 5:53 am UTC
- Forum: Forum Games
- Topic: Bad translator
- Replies:
**80** - Views:
**12450**

### Bad translator

Go to http://www.ackuna.com/badtranslator , enter in a phrase, set it to the desired amount of translations, and post the result here. Hilarity ensues.

"welcome to your doom!"

...20 translations later we get:

"We want to hear your fortune!"

"welcome to your doom!"

...20 translations later we get:

"We want to hear your fortune!"

- Fri Jul 22, 2011 5:41 am UTC
- Forum: Logic Puzzles
- Topic: Can you decode this?
- Replies:
**2** - Views:
**1558**

### Can you decode this?

I have constructed a cryptogram. Feel free to work together to solve it.

iimpqfyjxaruh

Since this is would be a bit unfair without one, I will give you a hint:

Hippasus

iimpqfyjxaruh

Since this is would be a bit unfair without one, I will give you a hint:

Hippasus

- Wed Jul 13, 2011 10:27 pm UTC
- Forum: Mathematics
- Topic: Need help with logarithm homework
- Replies:
**3** - Views:
**878**

### Re: Need help with logarithm homework

Thanks. Finished.

- Tue Jul 12, 2011 6:38 pm UTC
- Forum: Mathematics
- Topic: Need help with logarithm homework
- Replies:
**3** - Views:
**878**

### Need help with logarithm homework

I've been doing fairly well with logarithm homework, but the last problem is stumping me. The problem is 3(5^(2x+1)) = 18(2^(5x-3)). I need to write the solution as a natural logarithm. I've been able to move some things around, but I'm not sure if I'm making any progress, and don't know where to go...

- Fri Jul 08, 2011 2:56 am UTC
- Forum: Mathematics
- Topic: Need help with homework (seting up function from word prob)
- Replies:
**2** - Views:
**599**

### Re: Need help with homework (seting up function from word pr

Thanks. I really appreciate it.

- Fri Jul 08, 2011 2:21 am UTC
- Forum: Mathematics
- Topic: Need help with homework (seting up function from word prob)
- Replies:
**2** - Views:
**599**

### Need help with homework (seting up function from word prob)

Hey all. I'm retaking precalc (not because I failed it or anything. It's just been years since my last math class) and for this class, we have a quiz each day. I've been given practice problems for the next quiz which is at 8:00 tomorrow, and there's one type of problem that I'm pretty sure will sho...

- Sun May 29, 2011 5:37 pm UTC
- Forum: Serious Business
- Topic: Alternative Medicine, Psuedoscience, etc.
- Replies:
**255** - Views:
**34376**

### Re: Alternative Medicine, Psuedoscience, etc.

There are certain situations, though, when vitamin supplements are the best option, right?

Would it be a bad idea to take vitamin D pills in the winter under the reasoning that there's less sunlight then for your body to generate it naturally?

Would it be a bad idea to take vitamin D pills in the winter under the reasoning that there's less sunlight then for your body to generate it naturally?