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Science & Mathematics - 3 November 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

What is the solution?
What is the answer for:
8/(log_3 x^2) - 1/(log_x 3)=3

Note that log_3 x^2 means log that have base 3

2007-11-03 18:36:32 · 5 answers · asked by A A 1 in Mathematics

Do they read each other's minds? Or do they read their own mind...since the other psychic is reading their mind?Hmmmm...I never thought about this before! I'd like to give my self a star for this question. LOL

2007-11-03 18:26:43 · 14 answers · asked by Deenie 6 in Paranormal Phenomena

my mom mentioned it but im not sure?

2007-11-03 18:26:31 · 6 answers · asked by Kate 2 in Astronomy & Space

1. What is the y-intercept of y = cos x?

2. Find the amplitude of y = -2cos (4x - pi).

Could someone please explain these? Thanks.

2007-11-03 18:25:33 · 9 answers · asked by labelapark 6 in Mathematics

1. Find the period of y = -2 sin (8x + pi/2)

2. Find the period of y = 9/8 sin (- (8 pi x) / 3 )

Could someone please explain these questions? Thanks.

2007-11-03 18:17:40 · 2 answers · asked by labelapark 6 in Mathematics

2007-11-03 18:14:45 · 6 answers · asked by Anonymous in Mathematics

How do I find csc theta given that (9,12) is a point on the terminal side of the angle theta?

How do I do this? Thanks.

2007-11-03 18:06:21 · 1 answers · asked by labelapark 6 in Mathematics

2007-11-03 17:57:54 · 14 answers · asked by KÖoÌSÍÄy€r5 - "S" 4 SÍ 4 in Earth Sciences & Geology

How do you slove this???
lg(2x)-3lg2=(1/2)lg(x-3)

lg means log with base 10

2007-11-03 17:52:59 · 3 answers · asked by A A 1 in Mathematics

any interesting fact
such as waht a brain freeze acutally does to you?
or what does a eprson feel when they have a seizure?

2007-11-03 17:48:29 · 1 answers · asked by Anonymous in Medicine

Have you encountered a ghost or spirit, had things moved in your house (not by you or family), heard unfamiliar noises inside but never outside, ect.?

2007-11-03 17:44:34 · 10 answers · asked by dlphnlvr05 1 in Paranormal Phenomena

In a thunder and lightning storm there is a rule of thumb that many people follow. After seeing the lightning, count seconds to yourself. If it takes 5 seconds for the sound of thunder to reach you, then the lightning bolt was one mile away from you. Sound travels at a speed of 331 meters/second. How accurate is the rule of thumb? Express your answer as a precent error.

I this is for my stupid problem solving class that I HATE. If you solve it, you will be my hero and I will love you forever.

2007-11-03 17:37:15 · 7 answers · asked by dramastar_nsf 2 in Mathematics

find the first partial with respect to x of f(x,y,z) = z - sqrt(x^2-y^2), I don't see how the first partial is -x/2, i get -x/sqrt(x^2+y^2) what am I doing wrong?

2007-11-03 17:33:08 · 4 answers · asked by Anonymous in Mathematics

Which typed of Tree live in Coniferouse forest ?

Thank you

2007-11-03 17:33:00 · 3 answers · asked by Bobcat 2 in Botany

http://i10.tinypic.com/4uaj8ud.jpg

Someone please explain this to me. I know half is Photosynthesis, half is Glucose or something.. I don't know actually.

I need to understand it Monday for a test.
PLEASE MAKE IT SIMPLE.

2007-11-03 17:24:35 · 2 answers · asked by Anonymous in Biology

Prove that , if lim x = k , lim x' = k' ,then lim (x-x') = k-k' , lim(x*x') =k*k' , and if k' ≠0 , lim(x/x') = k/k'

2007-11-03 17:21:47 · 3 answers · asked by Anonymous in Mathematics

For the function f(x)=sqr root (x) we know f(4)=2 and f(9)=3.
(a) Use linear interpolation to find sqr root of 5
(b) Find the error to 3 decimal places using a calculator or sqr root table.
(c) What is the percentage error? (Recall that percentage error is 100*error/(exact answer).)

Thanks for the help...I think I got a and b but even with the formula laid out I can't seem to get c. So I figure maybe I better see the whole thing worked out.

2007-11-03 17:19:18 · 4 answers · asked by Mia 1 in Mathematics

Prove that , if a and b are real numbers :
││a│-│b││≦│a-b│≦│a│+│b│

2007-11-03 17:13:31 · 1 answers · asked by Anonymous in Mathematics

2007-11-03 17:12:40 · 8 answers · asked by mw 7 in Biology

a. An increase in the number of free iron molecules in the blood
b. An increase in the number of reticulocytes, or immature red blood cells, in the blood.
c. An increased amount of erythropoietin secreted from the brain
d. A and C are correct
e. B and C are correct

2007-11-03 17:11:02 · 6 answers · asked by Anonymous in Medicine

ok
what does the atomic number represent?
nubmer of electrons?protons?neutrons?


and what does the atomic mass represent?
electrons?neutrons?protons?

plz answer soon

2007-11-03 17:05:31 · 16 answers · asked by Anonymous in Chemistry

Given any rational number a and for any positive rational number ε , we can always find another rational number b such that │a-b│< ε .

2007-11-03 17:04:37 · 2 answers · asked by Anonymous in Mathematics

1. Let n=2^14 * 3^9 * 5^8 * 7^10 * 11^3 * 13^5 * 37^10.
a) how many divisors does n have?
b) how many divisors in a are divisible by m=2^3*3^4*5^7*11^2*37^2
(where n^m is n to the mth power and * = times)

2. Let m=8408400 and n=9316125
a) write m and n as a product of primes.
b. Without using the Euclidean Algorithm, find the greatest common divisor of m and n

3. Prove n is odd if and only if n^2+1 is even

4. Disprove: If n, m are perfect squares then n+m must be a perfect square

5. Use the Fundamental Theorem of Arithmetic to find the smallest interget n so that n * 1260 is a perfect cube




NOTE: i KNOW it's kind of scrambled and hard to read, but I didn't know what else to do. this is seriously killing me and the professor is impossible to understand in class.

2007-11-03 17:01:40 · 2 answers · asked by Anonymous in Mathematics

2007-11-03 16:54:36 · 6 answers · asked by Anonymous in Biology

in a particular chemical reaction, delta H=+100kj. when equilibrium has been established, it is found that a significant amount of product has formed, even though there is still some reactants left.

what has happened to entropy as this reaction was taking place?..can u explain how you arrived at that answer, cause im not sure how figure out, though rxn is endo why so much product formed.

2007-11-03 16:50:29 · 1 answers · asked by m 1 in Earth Sciences & Geology

Explain please.

2007-11-03 16:47:28 · 6 answers · asked by Nap 1 in Mathematics

'everyone' knows that( -b^2+,-sqrt4ac etc ) thing,but I am having a ding dang of a time trying to work out how it is actually derived, and getting into a whole mess of algebraic trouble

2007-11-03 16:39:34 · 3 answers · asked by c0cky 5 in Mathematics

Please, look at the picture (linked image) to solve the question below..
http://rokin.mireene.com/no2cl.gif


For the Lewis diagram, above, determine:

The overall charge of the molecular species shown.
The formal oxidation number of the nitrogen atom.
The formal charge on the nitrogen atom.


Would some one please help me?
Thanks in advance!

2007-11-03 16:36:13 · 2 answers · asked by Tuberose 1 in Chemistry

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