Science & Mathematics - 27 November 2007

something small, i need it for science fair and i really need help, so please help me

2007-11-27 17:39:54 · 2 answers · asked by londy s 1 in Engineering

A wire with mass 100g is stretched so that its ends are tied down at points 92.0cm apart. The wire vibrates in its fundamental mode with frequency 70.0 Hz and with an amplitude of 0.500cm at the antinodes.

What is the speed of propagation of transverse waves in the wire?

What is the tension in the wire?

2007-11-27 17:36:38 · 2 answers · asked by KT 1 in Physics

Chuck Norris disease?

2007-11-27 17:36:31 · 11 answers · asked by going postal 7 in Medicine

Scientists now believe that two parallel universes collided with each other thereby causing the Big Bang. And, that time itself actually existed before the Big Bang. What are your views on this? And, if there are dozens, maybe hundreds of parallel universes, there are other worlds with life on them and especially in other dimensions.

2007-11-27 17:25:49 · 10 answers · asked by ZORRO 3 in Astronomy & Space

2007-11-27 17:24:10 · 2 answers · asked by lien s 1 in Geography

This is the link of the problem:
http://s141.photobucket.com/albums/r77/rocketllamafootie/?action=view¤t=scan0011.jpg

2007-11-27 17:23:33 · 1 answers · asked by Anonymous in Mathematics

2007-11-27 17:22:16 · 5 answers · asked by higherlovetx 5 in Astronomy & Space

Hi I've been struggling with this problem and I would really appreciate any help or hints anybody could give me.
-----------

Let (X,d) and (Y,p) be metric spaces and
f:X->Y is a continuous function

Suppose C is a compact subset of X such that:

the restriction f|_C: C->Y is injective and for each x in C there exists a real number r(x)>0 such that, on the open ball (neighborhood) with radius r(x) around x consists of all x' in X such that d(x,x')
i.e. B(x,r(x))={x' in X|d(x,x')
and the restriction f|_B(x,r(x)):B(x,r(x))->Y is injective.
--------
prove that there exists a real number R>0 such that on the open subset G of X where G consists of the Union of all open balls of radius R centered at x

[i.e. B(x,R)] for all x in C
G=U_(x in C) B(x,R)

That the restriction f|_G: G->Y is injective
-----------
Thank you so much for taking the time to help me

2007-11-27 17:19:54 · 1 answers · asked by greeneggs4spam 3 in Mathematics

From Seattle, WA, which direction would I point toward at approximately 9PM if I wanted to point toward the Galactic Center of the Milky Way, or toward Sgr A? Would it be in the exposed night sky, or on the other side of the earth?

2007-11-27 17:17:43 · 1 answers · asked by Bustyn Y 2 in Astronomy & Space

2007-11-27 17:15:56 · 5 answers · asked by Simba 2 in Chemistry

2007-11-27 17:10:39 · 22 answers · asked by Daisy 4 in Paranormal Phenomena

Otherworlds. Other Realities

2007-11-27 17:01:34 · 10 answers · asked by Zaen K 1 in Paranormal Phenomena

how do you read 66 degrees 30' 00'' North
23 degrees 30' 00" North
23 degrees 30' 00" South
66 degrees 30' 00" South

2007-11-27 16:56:05 · 1 answers · asked by zevers356 2 in Geography

The discovery of Neptune is often quoted as a triumph of Newtonian mechanics. What is the reason for this statement?

a. Its location was predicted mathematically before it was actually seen.
b. The Dark Spot is due to differential rotation in its clouds
c. Uranus’ sideways rotation produces a wobble in Neptune
d. It is the farthest of the Jovian planets

2007-11-27 16:55:02 · 7 answers · asked by higherlovetx 5 in Astronomy & Space

i got x=-1 and i did the problem twice but my teacher still counted -1=x as the wrong answer. is there another one? someone mind helping me out here?

2007-11-27 16:48:51 · 9 answers · asked by Anonymous in Mathematics

the first half is identically equal to the second half and NOT equal to the second half

2007-11-27 16:47:35 · 1 answers · asked by Anonymous in Mathematics

2007-11-27 16:46:21 · 5 answers · asked by pamela w 1 in Mathematics

2007-11-27 16:45:47 · 1 answers · asked by tabby 1 in Botany

2007-11-27 16:41:52 · 11 answers · asked by evadz d 1 in Astronomy & Space

Hello guys,

Well, functions have me completely stumped. I am currently bluffing my way through Algebra I (advanced, 8th grade =/), and we hit functions yesterday - they have me completely stumped.

Specifically linear functions. It goes without saying (right?) that exponents, variables/constants in fractions, multiplying y and x, etc. disqualify them as linear functions, correct?

Regardless - I need help.

4y-2x=0

"Tell whether each function is linear. If so, graph the function."

So basically, I know it is linear, and I know how to graph - where do I go from there? The Algebra I teacher is a cool guy, he got us started on y=mx-b a long time ago, but I never under stood. I THINK I have to get y on its own, just like any equation's variable.

So would it be

y-1/2x=0? Where would I go from there?

/dying

By the way - why use (f)x, instead of y? I never understood - in some later stage of math, do the extra variables help you plug in factors and what not?

2007-11-27 16:41:24 · 5 answers · asked by Anonymous in Mathematics

A barge filled high with sand approaches a low bridge over the river and cannot quite pass under it. Should sand be added to, or removed from, the barge? (13-10)

please help, thanks!

2007-11-27 16:40:45 · 3 answers · asked by Callie 1 in Physics

13-5, please help, thank you!

2007-11-27 16:39:08 · 3 answers · asked by Callie 1 in Physics

parabola, and sketch

(x+8)^2 = 8(y+1)

thanks if you can help
this is on a practice test and no anwers were given.

2007-11-27 16:38:40 · 1 answers · asked by Boo Radley 4 in Mathematics

Solve by factoring: x^2 +3x - 18 = 0? can you also show me the steps by which you arrived at your answer?

2007-11-27 16:35:51 · 16 answers · asked by Sean 1 in Mathematics

2007-11-27 16:35:38 · 7 answers · asked by nolove4math 1 in Mathematics

Plants and animals –
Soils and rocks -
Fossil fuels
Oceans –
Atmosphere –

2007-11-27 16:35:37 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Hello! I really need help on my Alg. II Hw because I don't understand it! It's a Standardized Test Practice and here are the 5 questions I need help with!

1) If it takes 6 hours for 2 people to clean a house, how many hours will it take 4 people, working at the same rate, to clean another house that is the same size?
A. 2/3 hours
B. 1 1/2 Hours
C. 2 Hours
D. 3 Hours

2) What is the value of r^3 if 1/r= square root of 0.01?

3) For what integer value of m is 2m + 14> 42 and 5< m/4 + 3 < 7

given a>3 and b< -4 Solve:
a+b/a b/a +1

Ugh!
Algebra Kills me!
Please Help!!

2007-11-27 16:34:13 · 5 answers · asked by upsetness 2 in Mathematics

An object with weight 50 N is attached to free end of a light string wrapped around a reel of radius 0.25 m and mass 3 kg. The reel is a solid disk, free to rotate in a vertical plane about the horizontal axis passing through its center. The hanging object is released 6 m above floor. Part of the ques. asks me to determine tension in the string, so I drew a free-body diagram, but how can I determine tension with no acceleration?

2007-11-27 16:30:35 · 3 answers · asked by Muffins 1 in Physics

expired purinethol

2007-11-27 16:30:27 · 1 answers · asked by ramz b 1 in Medicine

How is MacGregor tomato is genetically engineered? For what purpose has it been modified. ?

2007-11-27 16:30:06 · 2 answers · asked by Anonymous in Agriculture