## Search found 15 matches

Fri Mar 25, 2011 5:30 am UTC
Forum: Science
Topic: Black Holes and Measurement
Replies: 9
Views: 1497

### Re: Black Holes and Measurement

I can't find the spot where they mention it, but I think it's either the creepy female physicist (~30mins) or the quantum physicist (~40mins) with long grey hair.
Thu Mar 24, 2011 9:52 pm UTC
Forum: Science
Topic: Black Holes and Measurement
Replies: 9
Views: 1497

### Black Holes and Measurement

So I was watching a documentary on youtube something along the lines of "The length of a piece of string" from BBC (I think it was). I can't remember the name of it exactly, but it showed all the issues about measuring perfectly a given object. They discussed fractals and uncertainty in th...
Thu Mar 24, 2011 9:33 pm UTC
Forum: Mathematics
Topic: Repeating decimals represented as fractions
Replies: 11
Views: 2989

### Re: Repeating decimals represented as fractions

You can convert them using a limiting sum as well.
For example, the decimal 0.3333....
You'd write:
3/10 + 3/100 + 3/1000 + ....
Then a=3/10, r=1/10
So you'd use the limiting sum formula: S=a/(1-r)
S=(3/10)/(1-(1/10))
S=1/3
Mon Mar 14, 2011 4:55 am UTC
Forum: Fictional Science
Topic: Gabriel's Horn
Replies: 29
Views: 10456

### Re: Gabriel's Horn

Then comes the question that if no one is at the other end (which is infinitely far away from the horn blower) would it still make a sound? It depends on your profession. For physicists, the answer is "yes", because a sound wave is produced. For audiophiles, the answer is "no", ...
Mon Mar 14, 2011 4:47 am UTC
Forum: Science
Topic: Photon-photon gravitational attraction
Replies: 54
Views: 5401

### Re: Photon-photon gravitational attraction

does a photon experience changes in time dilation... gah, this is confusing. Yeah it would experience perfect time dilation. The light we see now would be the exact same light from the origin of the big bang. Just as two boats traveling parallel can never feel the effects of the other's wake. That'...
Sun Mar 13, 2011 1:00 pm UTC
Forum: Science
Topic: Why do you love science?
Replies: 38
Views: 8747

### Re: Why do you love science?

Well loosely off science, I love maths since it'll be the first language that we talk to aliens with. As far-fetched as it sounds, it is true.
I also love how it simply just works and theres no such thing as subjectivity to skew the truths of the universe.
Sun Mar 13, 2011 12:51 pm UTC
Forum: General
Topic: Who the dickens are you?
Replies: 10922
Views: 2417524

### Re: INTRO THREAD THE THIRD

HOla! I like to go by the name Micali. I reside in Sydney Australia and I'm in my final year of school at the moment. Have a heavy interest in mathematics & physics but really considering business/commerce at uni. I'm a bit nerdy and i take solace in that, love working with computers too! (I cus...
Sat Mar 12, 2011 4:07 am UTC
Forum: Science
Topic: You might be a physics major if...
Replies: 540
Views: 64534

### Re: You might be a physics major if...

...if you've considered the vector of a ball while watching/playing sport and tried to make calculations on projectile motion before it lands.

and if you've ever used math in a game of pool/billiards.
Wed Mar 02, 2011 3:57 am UTC
Forum: Science
Topic: To what extent should space travel be funded?
Replies: 10
Views: 2252

### Re: To what extent should space travel be funded?

So, should the government spend large amounts of money of funding things like NASA? What about different areas of research? (obviously, this is very broad) No need to worry about the government funding for spacetravel. The public company, ' Virgin Galactic ' are already onto it. And I'd imagine tha...
Mon Feb 28, 2011 4:58 am UTC
Forum: Logic Puzzles
Topic: Troll Science: Pi
Replies: 45
Views: 26545

### Re: Troll Science: Pi

it's simply taxicab geometry. you can't 'infinitely' repeat it to infinity and therefore make the assumption it goes in a curved shape. rather it retains that jagged edge thus retaining the original length of the square, just at an infinitely small level. according to taxicab geometry, it will never...
Sat Feb 26, 2011 6:51 am UTC
Forum: School
Topic: TI-89 for Physics Major?
Replies: 14
Views: 2898

### Re: TI-89 for Physics Major?

Yeah we're only allowed a scientific calculator (non-programmable) on tests in our Calc 1-3 classes. Even then usually the tests are wrote in a way that makes them irrelevant. I mostly want it for the checking my answers at school thing. Although students have free access to matlab from home at my ...
Sat Feb 26, 2011 6:39 am UTC
Forum: Logic Puzzles
Topic: A very interesting Mathematical Paradox
Replies: 387
Views: 158089

### Re: A very interesting Mathematical Paradox

Wait, this doesn't make sense. If you times x=0.9999... By ten (0.9999...X10), then you have, no matter how many nines, whether it's two, or infinity, 9.9999...9 minus 0.000...9 (9.9999...9-0.000...9). Which means that if you minus it by x, then you get a number that equals 8.(?), not 9. That will ...
Thu Feb 24, 2011 12:30 pm UTC
Forum: Science
Topic: Depressing Physics test
Replies: 21
Views: 3356

### Re: Depressing Physics test

So you had a bad exam. Big whoop it happens to everyone. I think I must have been in Year 11 (A Junior for you Americans) at school doing our end-of-year Physics exam. We had some simple question about an obese woman jumping on a trampoline over a period of time and losing weight as she did it. The ...
Thu Feb 24, 2011 7:13 am UTC
Forum: Gaming
Topic: Minecraft
Replies: 9442
Views: 1536555

### Re: Minecraft

Minecraft in the source engine would be amazing. There's a lot of stuff in Garry's Mod trying to replicate Minecraft but its just not the same.
Thu Feb 24, 2011 7:04 am UTC
Forum: Science
Topic: Transformers
Replies: 10
Views: 1386

### Re: Transformers

Wouldn't the currents just induce eddy currents into the transformers core whilst cancelling out their magnetic fields in the centre? Just converting to the eddy currents to heat as more current is induced.