Science & Mathematics - 6 August 2007

According to Super-String theory, it is tiny, tiny one-dimensional strings of vibrating energy that allows for the exists of matter at every level of structure. According to Brian Greene of, The Fabric Of The COSMOS, it is the frequency and amplitude of the vibrations of these tiny bits of string energy that results in matter and the general characteristics of matter.

Since any given string is capable of vibrating at any of a large number of frequencies and amplitudes, what regulates string behavior and thus, creates "stability" in the resulting forms of matter? Without some form of control, what keeps a given string from vibrating at anyone of a large number of frequencies at any one time? Does the mathematics have anything to say about control and regulation of string behavior over time?

Can such string variations be correlated with phase-transitions in matter, like when water goes from solid to liquid to steam?

2007-08-06 10:09:33 · 8 answers · asked by Bob D1 7 in Physics

y" - 2y = 0

how do you do with second derivative?

2007-08-06 10:09:08 · 2 answers · asked by jessica y 1 in Mathematics

I have no idea what Ka or Kb even is. I just need some help.

1. When 0.20 mol of lactic acid, HC3H5O3. is added to water to make 1.0 L of solution. The equilibrium hydrogen ion concentration is 5.3 x 10-3 M. What is the Ka of the lactic acid?

HC3H5O3 (aq) → H+(aq) + C3H5O3- (aq)

2. A 0.10M solution of formic acid has an equilibrium [H+] = 4.2 x 10-3 M. What is the Ka of the formic acid?

HCOOH(aq) → H+(aq) + HCOO- (aq)

3. What is the equilibrium hydrogen ion concentration of a 0.25M solution of carbonic acid, H2CO3? The Ka = 4.2 x 10-7.

H2CO3 (aq) → H+(aq) + HCO3-(aq)

4. What is the equilibrium for the hydroxide ion in a 0.10M solution of CN-? The Kb is 2.0 x 10-5.

CN-(aq) → OH-(aq) + HCN(aq)

5. What is the equilibrium concentration of hydrogen ion in a 0.10 M solution of propanoic acid, C2H5COOH? The Ka of propanoic acid is 1.8 X 10-5.

C2H5COOH(aq) → H+(aq) + C2H5COO -(aq)

Any help is appreciated

2007-08-06 10:06:38 · 3 answers · asked by Anonymous in Chemistry

2007-08-06 10:05:30 · 9 answers · asked by john a 1 in Biology

what is the definition of bearing in trigonometry?

2007-08-06 10:04:13 · 2 answers · asked by Laurize 1 in Mathematics

when w is used in terms of pi and 2pi, what does that represent in terms of true freq? (Mhz?)

2007-08-06 10:03:53 · 3 answers · asked by a a 1 in Engineering

2007-08-06 09:59:05 · 12 answers · asked by Brundle 1 in Physics

2007-08-06 09:47:01 · 2 answers · asked by Anonymous in Chemistry

and what are there uses

2007-08-06 09:46:51 · 6 answers · asked by linifer74 1 in Chemistry

2007-08-06 09:45:17 · 8 answers · asked by rubilonmusic 2 in Earth Sciences & Geology

The dictionary defines "wind" as:

air in natural motion, as that moving !horizontally! at any velocity along the earth's surface


But you can't have a horizontal motion on a round surface. If you could, you'd define horizontal as going around the surface, and thus there could be on horizontal lines. And you can't define horizontal as "perpendicular to vertical" since there are and infinite number of vertical lines coming from the center of the earth. That would make the term vauge. even a vertical line is perpendicular to some of the other vertical lines coming from the center of the earth. Therefore, there can be no horizontal lines.

How am I wrong in the conclusion that there can be no horizontal lines?

2007-08-06 09:38:37 · 5 answers · asked by doo_grammar_good 2 in Other - Alternative

2007-08-06 09:36:13 · 12 answers · asked by Anonymous in Astronomy & Space

2007-08-06 09:33:05 · 3 answers · asked by a a 1 in Engineering

How many amperes, on average are allotted to a single bedroom circuit?
:) thx!

2007-08-06 09:32:38 · 8 answers · asked by the_pink_dahlia 1 in Engineering

Hi guys and girls, just found this little critter in my room, I'm panicking that it is a cockroach but I can't really find one that looks simlar although I've just read that there are over 300 types, it has a round head, then a square bit behind that then and oval shape, very similar to a cockroach, its a dark reddy brown in colour and has quite shorts antennas (is that what they're called?) from what i can see its legs arent hairy like i think they would be if it was, i hope to god this is just a beetle! Please see the link to the pictures, thanks alot! Jess

Cockroach? :

http://i128.photobucket.com/albums/p196/pinkxbubblegum/DSCF9172.jpg

http://i128.photobucket.com/albums/p196/pinkxbubblegum/DSCF9171.jpg

http://i128.photobucket.com/albums/p196/pinkxbubblegum/DSCF9168.jpg

2007-08-06 09:31:49 · 16 answers · asked by Anonymous in Zoology

2007-08-06 09:30:17 · 7 answers · asked by Bill W 【ツ】 6 in Zoology

I managed 6 times but I think there is a limit regards of the size you start with

2007-08-06 09:29:08 · 25 answers · asked by Anonymous in Physics

Hello im a student of high school .wud like to share that i'm a genious at all subjects . But have lately developed a very bad habit of internet addiction.I love searching pics of various things(flowers,babies actors ,actressesetc.),,I like orkutting,and I like watching **** as well(most horrible of all), I even chat. to be very precise wid all dis is ruining my studies and my aim of acheiving very high marks in boards is getting shattered.Please tell me proper ways to get out of all dis and concentrate on just one thing that is my "STUDIES.'

2007-08-06 09:27:01 · 8 answers · asked by Anonymous in Astronomy & Space

Hello im a student of high school .wud like to share that i'm a genious at all subjects . But have lately developed a very bad habit of internet addiction.I love searching pics of various things(flowers,babies actors ,actressesetc.),,I like orkutting,and I like watching **** as well(most horrible of all), I even chat. to be very precise wid all dis is ruining my studies and my aim of acheiving very high marks in boards is getting shattered.Please tell me proper ways to get out of all dis and concentrate on just one thing that is my "STUDIES.'

2007-08-06 09:26:44 · 9 answers · asked by Anonymous in Astronomy & Space

2007-08-06 09:25:44 · 2 answers · asked by Help 1 in Physics

1. What r some similarities and differences between the electric force and gravitational force ?

2. A small glass rubbed silk gains a charge of + 2.0 C. THe glass ball is placed 12 cm from charged rubber ball that carries a charge of -3.5 C
a. What is the magnitude of the electric force between the 2 balls?
b. Is this force attractive or repulsive?
c. How many electrons has the glass ball lost in the rubbing process?

2007-08-06 09:23:59 · 2 answers · asked by Brilliant Queen (BQ)_forever !!! 5 in Physics

A pair of narrow slits, separated by 1.8 mm is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase. A fringe pattern is observed on a screen 4.8 m from the slits
monochromatic light of 450 nm wavelength is used. The angular separation between adjacent dark fringes on the screen, measured at the slits, in m rad, is closest to:


a.0.20
b. 0.36
c. 0.15
d. 0.30
e. 0.25

2007-08-06 09:16:17 · 2 answers · asked by ABC 4 in Physics

aliens are our desendants, we are their ancestors. Being that in order for them to travel from planets beyond our solar system would take light years, then time travel may be possible through the measurment of distance in time, therefor allowing them to look back at us/in time when we have sightings of UFO's. They are traveling back in time in theory, and we are their past.

2007-08-06 09:14:00 · 8 answers · asked by Anonymous in Astronomy & Space

If the crate has a mass of 100kg how much force would be rquired to start it sliding...
I want to kno the formula. am not sure the 1 am using is correct

2007-08-06 09:13:00 · 3 answers · asked by xplicit 2 in Physics

scince project need help.

2007-08-06 09:11:20 · 4 answers · asked by tinkie1992 3 in Weather

2007-08-06 09:09:23 · 4 answers · asked by tinkie1992 3 in Weather

The top length of the container is 145", the bottom length is 38", the width of the container is 31", and the height is 39".

2007-08-06 09:07:59 · 6 answers · asked by Steven B 1 in Mathematics

I was soo expecting an A for my class, I don't understand how I got a B. My teacher provided me with the syllabus as an explanation, but that still doesn't help me: Here are my grades:

84.78 -- Test 1
60 -lowest grade is dropped --Quiz 1
62.5 --- quiz 2
100 ---quiz 3
87.5 --- Test 2
100 --- quiz 4
89.47 ---Test3
80 ---- quiz 5
100 ---- quiz 6
70 ----- quiz 7
-----------------------------
774.25/9 = 86.02 without extra credit points and/or
extra 10 points for being the only person to make 100% on quiz 3.
Extra credit is worth 3-5 points per question and I did 21
questions, so even if I only got the minimum of 3 points for each question I should still get atleast a 90 which is an A.
So I'm really not sure how my average/grade turned out
to be 87.27%

Quizzes = 40%
Tests 1, 2, 3 = 30% each

So can you please help me figure out what my grade should be. Is it really a B?

2007-08-06 09:06:13 · 11 answers · asked by TCM 3 in Mathematics

It might sound crazy,but... could u send via e-mail photos you have taken with your telescope? I'm mostly interested in planet Venus which is very very close to Earth these days. But i would appretiate it if u could send me also 1-2 photos of a galaxy or another planet. I love astronomy but cannot afford an expensive world class telescope...

xhack13@yahoo.gr

2007-08-06 09:01:28 · 5 answers · asked by Anonymous in Astronomy & Space

A charge q1 of -5*10 ^ -9 and the charge q2 of -2 * 10 ^-9 C are seperated by the distance of 40 cm. Find the equilibrium position for a third charge +15*10 ^ -9 C.

2007-08-06 08:57:23 · 2 answers · asked by Brilliant Queen (BQ)_forever !!! 5 in Physics