Science & Mathematics - 16 September 2007

small charged sphere of radius a=1.00 cm is suspended by a nylon thread inside a larger neutral, conducting sphere. The larger sphere has an interior radius b=3.10 cm and is Δ=0.5 cm thick. The charge on the small sphere is q=0.90 nC. The two spheres are concentric and insulated from their surroundings. For the following questions, the origin of our coordinates is the center of the spheres.

1) What is the magnitude of the electric field just inside the larger sphere?


2)What is the magnitude of the electric field at a radius 3.35 cm?

3) What is the magnitude of the electric field at a radius 10.0 cm?

4) What is the magnitude of the electric potential at the surface of the smaller sphere?

5) What is the magnitude of the electric potential at the outside surface of the larger sphere?



I've been trying to figure out this problem for couple of hours now, i cant seem to figure it out....please help

2007-09-16 16:57:44 · 1 answers · asked by chs_soccer_02 2 in Physics

you don't even know how an outer space creature look like how can you give it a name??? and why does all alien figures are ugly???

2007-09-16 16:57:24 · 6 answers · asked by RAY H 1 in Astronomy & Space

No doubt a lot of so called astronomers will cry Blasphemy..
When I say that they all should sit down and consider wether what they have read about the Big Bang being the start of the Universe is TRUE...
Its only a Theory and not even close to have been proven.
Is it not true that they assume it to be true because some theorist say's that this how it started and they believe him/her.
without any evidence what so ever.
Now dont say that there is eveidence that a big bang occured because there isn't any..
All the so called believers in the BIG bang theory are in for a BIG surprise..That it never ever occured...
Well whats your opinion...?

2007-09-16 16:50:59 · 28 answers · asked by Anonymous in Astronomy & Space

Solve for x in [-pi,pi]: tan(x)-sin(2x)=0

thanks

2007-09-16 16:47:11 · 4 answers · asked by ILuvTaraReid 2 in Mathematics

can someone show or tell me how to do this? x^2-x-12/4-x

2007-09-16 16:42:20 · 2 answers · asked by Anonymous in Mathematics

the center of gravity of the box is elevated 3 m above the ground, the kinetic energy decreases 50 J. The only forces reacting upon the object is force R ( parallel to the incline) and the force of gravity. the incline is frictionless and g=9.841. calculate the magnitude of R

2007-09-16 16:40:16 · 1 answers · asked by wills 3 in Physics

I'm mixed on this question. Since one point could be on infinite many planes... does that apply to five points too?

2007-09-16 16:38:41 · 9 answers · asked by Sai 1 in Mathematics

I'm gotten old guys, I need help with my math. Can u help me answer this math problem please?

2007-09-16 16:34:44 · 9 answers · asked by sabur 1 in Mathematics

it is asking me to graph the inequality in a coordiante plane.

y=>-x+4

how do i graph that?

plz help me step by step

2007-09-16 16:34:43 · 4 answers · asked by Anonymous in Mathematics

2007-09-16 16:31:54 · 5 answers · asked by yeahyeahyeah 4 in Mathematics

Can you help with this? I did this a couple years ago and totally forgot it.

What is the value of S when R=10?

r: 0 2 4 6 8 10
s: 7 11 23 43 71 ?

2007-09-16 16:31:26 · 4 answers · asked by Anonymous in Mathematics

2007-09-16 16:31:13 · 7 answers · asked by stephanie 1 in Physics

2007-09-16 16:28:03 · 13 answers · asked by daniel_jeevanraj 1 in Astronomy & Space

how can i light a candle in a room without the smell of smoke?

2007-09-16 16:23:08 · 7 answers · asked by Anonymous in Other - Alternative

2007-09-16 16:18:42 · 8 answers · asked by Anonymous in Physics

To clarify the question a little,. Im not talking about,.gravity fields,.electromagnetic radiation, or Background Radiation, .as all these Forces and fields are dependant upon a medium to propagate, I am instead referring to the Medium itself "Space",.of course there are some who would say that Space for example cannot exist without gravity, and the other forces,.ive mentioned,.in my opinion that is not true,

2007-09-16 16:17:52 · 4 answers · asked by Joseph 2 in Astronomy & Space

2007-09-16 16:09:34 · 7 answers · asked by Anonymous in Astronomy & Space

An object with a known mass, say one kilogram, is moving in a direct line (say from West to East) from point 1 to point 2 with a known speed, say one meter per second. At 2 a force acts on the object. The force does not change the object's speed, but does change its direction of motion by 45 degrees (to the South East). Is it theoretically possible to calculate how strong the force was?

a) Yes, the strength of the force can be calculated (though I might not know how to do the calculation).

b) No, the force cannot be calculated by anyone.

2007-09-16 16:07:58 · 3 answers · asked by ? 6 in Physics

2007-09-16 16:04:58 · 11 answers · asked by Learner 7 in Zoology

diehidration so she drank a lot of water. But now she isnt back to her regular self and dosent always feel great she just lays on the couch.She isnt her regular peppy self.The doctor said when we took her too the doctor that she had only gained 1 pound in the last two years.YUCK. should we take her to the hospital or back to the doctor?

2007-09-16 16:03:24 · 10 answers · asked by Anonymous in Medicine

2007-09-16 16:03:04 · 3 answers · asked by alexess 1 in Engineering

the bridge has to be 17 in. long and has to hold alot of weight im going to set a record for my class which means i would have to beat 400 washers

2007-09-16 16:01:02 · 3 answers · asked by mkwarrior02 1 in Engineering

Solve for u,v:

(1/ u + v - 1) + (1/ u + v + 1) = 0

2007-09-16 16:00:51 · 2 answers · asked by Anonymous in Mathematics

Please show a DETAILED process of how to simplify this exponent... since i dont quite understand how to do it.

note: ^9 = 'to the power of 9'. therefore, 4^9 means 4 to the power of 9, etc.

4a^7 * b^-9 * c^-3
-------------------------- [all divided by]
3a^6 * b^-2 * c^8

2007-09-16 16:00:17 · 2 answers · asked by Anonymous in Mathematics

Patrick, by himself, can paint four rooms in 10 hours. if he hires April to help, they can do the same job together in 6 hours. If he lets April work alone, how long will it take her to paint four rooms?

the answer i got was 15 hours, is that correct?

2007-09-16 15:58:26 · 5 answers · asked by book worm 1 in Mathematics

How does e^1-e^(-1) workout to be 2sinh(1)?

2007-09-16 15:58:23 · 2 answers · asked by Anonymous in Mathematics

[x+1- (6/x)] / [x + 5 + (6/x)] . I already know the answer but when i tried doing it i got x( x+7)/ x(x+11) which is not even close to the answer. Please help me by explaining the steps/ process of working this problem.

2007-09-16 15:57:40 · 6 answers · asked by Jeff MAD 1 in Mathematics

A. All of these statements are true.
B. Red blood cells carry oxygen; white cells do not.
C. White blood cells are larger than red blood cells.
D. White blood cells have a nucleus; red blood cells do not.
E. White blood cells fight infection; red blood cells do not.

2007-09-16 15:57:34 · 5 answers · asked by wonderwoman 1 in Medicine

integral of (1+cos)^(1/2)

2007-09-16 15:57:16 · 1 answers · asked by The Dude 3 in Mathematics

1. Let f(x)=x^3-6x^2+x+4 and g(x)=x^5-6x+1 be polynomials in Q[x].

(a) Determine all greatest common divisors of f(x) and g(x)

(b) Let d(x) be that greatest common divisor of f(x) and g(x), in which the coefficient of the highest power of x equals 1. Determine s(x), t(x) E Q[x] such that d(x)=s(x)f(x)+t(x)g(x).

(NOTE: E means 'Element Of')

2. List all polynomials of degree 4 in Z(subscript 2)[x] and express them as products of irreducible polynomials in Z(subscript 2)[x].

3.The polynomials x^3+2x^2+2x+1 can be factored into linear factors (i.e written as a product of polynomials of degree 1) in Z(subscript 5)[x]. Find this factorisation.

If someone could please help and give full working out I would really appreciate it.

Don

2007-09-16 15:56:40 · 1 answers · asked by Anonymous in Mathematics