Science & Mathematics - 22 September 2007

i dont know how to do ions

Mg2+
K+
Cl-

and try to explain to me how you got the answers
O2-

2007-09-22 12:24:47 · 2 answers · asked by Anonymous in Chemistry

2007-09-22 12:22:59 · 4 answers · asked by baseballman1243 1 in Mathematics

Let G be a group with the following property: whenever a, b, and c belong to G and ab = ca, then b = c. How can you prove that G is Abelian??? (hint: cross cancellation implies commutatively).

2007-09-22 12:22:50 · 5 answers · asked by Anonymous in Mathematics

What would be your reaction and what would you do?

2007-09-22 12:19:29 · 13 answers · asked by B-Dub 2 in Astronomy & Space

My question is almost the same as the question you see at this link, http://www.licil.org/Tucker/math/physics3.htm (#24-2 Electric Field),

The only differences are the E Field now piercing the Guassian cube is now E=4.0i-3.0(y^2+2.0)j, and find the electric flux through the top face, bottom face, left face, back face, and the net electric flux through the cube.

Just like always SHOW ME AS MUCH WORK AS POSSIBLE, and I have answer I just want to see if it is right, so PLEASE LEAVE AN ANSWER!

2007-09-22 12:19:17 · 1 answers · asked by Usef L 1 in Physics

Please can somebody help me with this, thankyou very much =]

2007-09-22 12:19:01 · 3 answers · asked by Anonymous in Mathematics

i tred to search any example of symbiotic in tundra, but can't find it, i've tried yahoo and google and dk any other website i can try on. Can anyone give me some examples, plzzz

2007-09-22 12:18:49 · 2 answers · asked by snowday 3 in Biology

2007-09-22 12:15:23 · 3 answers · asked by Anonymous in Physics

Since I was a teen (I'm now 27), I've had unexplained back and neck pain, headaches, muscle tension, and spasms. About a year and a half ago, the doctors figured it out after an MRI. They said I had varying degrees of damage (none really serious, but all problematic) in four cervical discs with moderate reversal of cervical lordosis.

It seems that the problem is congenital because my mother and both sisters have it to varying degrees. Physical therapy did not help significantly and was way too expensive for me to be able to do it long term.

What are my options for the reversal of lordosis? I know that the discs can improve with physio, postural training, exercise, chiropractic, and other treatments, but I suspect that orthotics or surgery may be the only hope for the curvature problem.

I ask that only medical professionals and those with direct experience with this problem respond.

2007-09-22 12:11:18 · 2 answers · asked by celerybad 2 in Medicine

2007-09-22 12:11:18 · 4 answers · asked by Li 2 in Earth Sciences & Geology

what is an organic compound called that is used to store energy and forms important parts of biological membranes?

2007-09-22 12:06:00 · 2 answers · asked by Anonymous in Biology

3+√x+2=1

a.62
b.64
c{}
is this answer c.

√x+5=9

a.2
b.4
c.16
4?

do this have roots.?
2√5x-4 -3=-11

2007-09-22 12:05:18 · 1 answers · asked by yoshi_gurl08 1 in Mathematics

I need help solving this inequality:

2x-5/4 < 3x -4

Thanks for the help!!!!

2007-09-22 12:02:41 · 3 answers · asked by Mia16 3 in Mathematics

2007-09-22 11:59:48 · 8 answers · asked by Washington 2 in Astronomy & Space

http://i1.tinypic.com/4xopcnd.jpg

i got:
x2 - 6x = x + 8
x2 = 7x + 8
x2 + 7x + 8 = 0

then i got confused
(by x2 i mean x squared)

2007-09-22 11:59:16 · 6 answers · asked by . 3 in Mathematics

anyone know websites or has the names of all the countries in Russia? thanx...

2007-09-22 11:59:00 · 9 answers · asked by princess me 1 in Geography

2007-09-22 11:55:16 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-22 11:52:09 · 1 answers · asked by John D 2 in Chemistry

2007-09-22 11:44:34 · 4 answers · asked by joan t 1 in Zoology

2007-09-22 11:36:55 · 5 answers · asked by John 1 in Chemistry

2007-09-22 11:35:07 · 1 answers · asked by rene r 1 in Mathematics

Which statement below is false?

A. The wavelength of light is the distance between two corresponding points in the wave pattern.
B. The frequency of light increases as wavelength decreases.
C. The higher the frequency of light, the greater its energy.
D. The frequency of light is the number of waves that pass a given point in a second.
E. The higher the frequency of light, the longer the wavelength.

2007-09-22 11:34:13 · 6 answers · asked by desigoddess217 1 in Physics

A van accelerates down a hill, going from rest to 30.0 m/s in 7.10 s. During the acceleration, a toy (m = 0.350 kg) hangs by a string from the van's ceiling. The acceleration is such that the string remains perpendicular to the ceiling.

Determine the angle of incline of the hill that the car is going down, and the tension of the string.

Thanks much!

2007-09-22 11:32:04 · 1 answers · asked by Bill 1 in Physics

An unknown compound contains C, H and N. When 0.574 g was burned in a combustion apparatus 0.4187 g of H 2O and 1.1364 g CO 2 were produced. What is the empirical formula of the compound?
just tell me the procedure

2007-09-22 11:30:30 · 2 answers · asked by Anonymous in Chemistry

Scientists believe we all came from the same origin in Africa millions of years ago based on DNA traces. Do you think it is possible that similar species (i.e. similar DNAs) may have developed in difference places on earth? For example: Do you believe butterflies or ants around the world were all originated from one butterfly or ant somewhere?

2007-09-22 11:29:24 · 12 answers · asked by Phil 3 in Biology

2007-09-22 11:29:19 · 4 answers · asked by Anonymous in Earth Sciences & Geology

This mechanics problem is thoroughly kicking my ***. I would appreciate any help - preferably if you could take me step through step through how to solve it...

Two objects with masses of 2.00 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley.
Determine the tension in the string in Newtons.
Determine the acceleration of each object.
(c) Determine the distance each object will move in the first second of motion if both objects start from rest.

Thanks much!

2007-09-22 11:28:56 · 1 answers · asked by Bill 1 in Physics

This mechanics problem is thoroughly kicking my ***. I would appreciate any help - preferably if you could take me step through step through how to solve it...

Two objects with masses of 2.00 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley.
Determine the tension in the string in Newtons.
Determine the acceleration of each object.
(c) Determine the distance each object will move in the first second of motion if both objects start from rest.

Thanks much!

2007-09-22 11:27:56 · 2 answers · asked by Bill 1 in Physics

im doin a project

2007-09-22 11:27:29 · 6 answers · asked by piratesrockmysox2 1 in Astronomy & Space

The tallest Sequoia sempervirens tree in California's Redwood National park is 111 m tall. Suppose an object is thrown downward from the top of that tree with a certain initial velocity. If that object reaches the ground in 3.80 s, what is the object's initial velocity?

2007-09-22 11:25:01 · 3 answers · asked by Anonymous in Physics