Science & Mathematics - 11 December 2007

I am trying to do some problems for calc review, and everytime I attempt this problem, I end up getting stuck, anyone care to show me how this problem is done?

f(x)= 1/x^(1/2) assuming x>0.

I need to use the definition f'(x)=lim h->0 (f(x+h)-f(x))/h

2007-12-11 04:54:49 · 2 answers · asked by Robert N 3 in Mathematics

just kinda thinking about possibilities @ the moment.. thinking about rapid prototyping with ice... dunno.. fun to think about.

2007-12-11 04:52:31 · 1 answers · asked by bandaidsrcool 2 in Physics

2007-12-11 04:45:55 · 3 answers · asked by Anonymous in Agriculture

2007-12-11 04:45:35 · 1 answers · asked by hot1420022003 1 in Zoology

2007-12-11 04:44:26 · 5 answers · asked by Me 1 in Biology

Recently I have seen a BBC program on Black Holes. I assumed after watching that show, that the galaxies which have Black Holes at its centre are actually sprial. This is because Black Hole is consuming the galaxy which makes it look spiral when seen from outside the galaxy.

2007-12-11 04:40:08 · 9 answers · asked by Piscesian 3 in Astronomy & Space

F(s) = (e^(-6s)-e^(-7s))/(s^6))

2007-12-11 04:38:53 · 1 answers · asked by Kai 4 in Mathematics

Calculate the standard entropy change for the following reaction,

2 HgO(s) → 2 Hg(λ) + O2(g)

given S°[HgO] = 70.3 J/K·mol, S°[ Hg(λ)] =76.0 J/K·mol, and S°[O2(g)] = 205.1 J/K·mol.

a.+210.8 J/K
b.-216.5 J/K
c.+351.4 J/K
d.+497.7 J/K
e.+216.5 J/K

2007-12-11 04:37:15 · 3 answers · asked by Anonymous in Chemistry

2007-12-11 04:35:26 · 15 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-11 04:35:24 · 4 answers · asked by Anonymous in Zoology

Estimate the boiling point of carbon tetrachloride given the following thermodynamic parameters

CCl 4 (λ) CCl 4 (g)

ΔH°f(kJ/mol) -128.4 -96.0
ΔS°f( J/K·mol) 214.4 309.7
ΔG°f(kJ/mol) -57.6 -53.6

a.69 °C
b.109 °C
c.-272 °C
d.67 °C
e.25 °C

2007-12-11 04:34:35 · 0 answers · asked by Anonymous in Chemistry

01. Jackson
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07. Jamestown
08. Johnson City
09. Jericho
10. Jellico
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19. Palmetto
20. Hell
21. Christmas

2007-12-11 04:29:47 · 39 answers · asked by AKA FrogButt 7 in Geography

Question: Find the line tangent to the equation y=ln(y/x) at the point (e,1) using implicit differentiation.

...please help!!

2007-12-11 04:29:30 · 3 answers · asked by txgurl4sho 1 in Mathematics

This is a mathematical statement: 0,9999999999999 (inifitely) = 9/9 = 1.

Do you agree, yes or no and why?

2007-12-11 04:28:00 · 20 answers · asked by Anonymous in Mathematics

please help

2007-12-11 04:24:12 · 2 answers · asked by balrr4life 2 in Biology

2x -3y -z =0
-x +2y +z =5
3x -4y -z =1

2007-12-11 04:20:44 · 3 answers · asked by Anonymous in Mathematics

2007-12-11 04:18:13 · 4 answers · asked by madk63 1 in Mathematics

2007-12-11 04:16:48 · 5 answers · asked by Anonymous in Mathematics

Let vector F(x,y)=<√y , √x> be a force field. Let R be the region bounded by y=0, x=2 and y= (x^3)/4. Let C be the closed curve, oriented counter-clockwise, which is the boundary of region R.

A. Draw a sketch of R and C. (I know...you can't do it on here...just giving all the instructions).
B. Using a Line Integral, compute the work done by the force field F on an object that travels one time around the path C.
C. Compute the following double integral:
∫ ∫½((x^-½) - (y^-½))dA
D. Does Green's Theorem say that your answer from part b and c should be equal? Are they equal?

Okay...so I know that I can't use Green's Theorem on the region enclosed by curve C, since F does not have first order partial derivatives at the origin. But the way that they work the problem out makes no sense to me....So please could a GENIUS help me with the problem...Please explain it so that I can understand!!!! Thanks so much for your work! (And your brain power! haha!) =)

2007-12-11 04:14:42 · 3 answers · asked by livingall_4_god 2 in Mathematics

general

2007-12-11 04:13:59 · 7 answers · asked by hawer01 1 in Astronomy & Space

in maths! lol what is it?! and in language a 12 year old wud no ! please thanks xxxx

2007-12-11 04:13:56 · 16 answers · asked by PaIgE c 1 in Mathematics

y=sin (xy^2)

Only the y in the parentheses is squared...not the x. You don't have to show your work. Just give me an answer. Thanks.

2007-12-11 04:13:08 · 2 answers · asked by Sam 6 in Mathematics

what is the sum of this infinite geometric sequence
24,-12,6,-3.............
I dont even know how to start this. help please

2007-12-11 04:13:00 · 3 answers · asked by nancy 1 in Mathematics

If I wanted to turn a sheet of steel into the face of Mickey Mouse (not that I would, without the trade mark...), who would I call?

2007-12-11 04:08:10 · 8 answers · asked by Shant 2 in Engineering

2007-12-11 04:07:44 · 1 answers · asked by Anonymous in Mathematics

Thank You. Consider the function .?
Consider the function .?
f(x)=x^2-8x+12
a) Find h, the x-coordinate of the vertex of this parabola.

b) Substitute the two whole number values immediately to the left and right of h into the function to find the corresponding y. Fill in the table below. Make sure your x-values are in increasing order in your table.
x y

2007-12-11 04:06:20 · 2 answers · asked by ViewSonic 2 in Mathematics

2007-12-11 04:04:27 · 6 answers · asked by Anonymous in Other - Science

2007-12-11 04:01:41 · 1 answers · asked by Jose T 1 in Mathematics

2007-12-11 04:01:22 · 4 answers · asked by goku 1 in Earth Sciences & Geology

I have gotten this far:
x^2-2x-11=0
-b+or-sq. rt. of b^2-4ac/2a
2+or- sq.rt. of (-2)^2-4(1)(-11)/2
2+or- sq.rt. of 48/2

I can't figure out what to do to simplify the equation after. Since the sq. rt. of 48 is not a real #, what do we do to simplify?

2007-12-11 04:00:07 · 5 answers · asked by Jenny D 1 in Mathematics