Science & Mathematics - 15 December 2007

Find the coordinates of the foci- How did you get it?


X^2/36 + x^2/9 = 1

2007-12-15 11:33:18 · 1 answers · asked by Anonymous in Mathematics

2007-12-15 11:31:56 · 14 answers · asked by Tracy Terry 1 in Astronomy & Space

OK, Here's the thing. I have 5 trained monkeys and they like to run with scissors. I know that there is some rule that says that you aren't supposed to run with scissors in the house, but my question is, does this same rule apply to monkeys and if so, what will be the legal ramifications? Should I be getting lawyers for my monkeys?

2007-12-15 11:29:33 · 5 answers · asked by Anonymous in Other - Alternative

Some guys write in html code( i guess) some math symbols like existence sign. Why my computer does not display them?

2007-12-15 11:28:18 · 3 answers · asked by Theta40 7 in Mathematics

problem:
consider the function y(x), given by
y(x)=summation (0 to infiniti) [x^(2n)]/(1-2n)

find a power series expansion of (integral symbol) y(x) dx

so far i have...
y(x) = ∑ [x^(2n)] / (1-2n)...........n=0 to infinity

y(x) = 1 + [ (x^2) / (-1) ] + [ (x^4) / (-3) ] + [ (x^6) / (-5) ] + ...

= 1 - (x^2) - (1/3)*(x^4) - (1/5)*(x^6) - . . .

∫ y(x) dx = x - [ (x^3) / 3 ] - [ (x^5) / (3*5) ] - [ (x^7) / (5*7) ] - . . .

my problem is that i can't find the shorthand sigma notation for this result and i don't know how. it's really bothering me. your help is much appreciated. thank you

2007-12-15 11:21:22 · 1 answers · asked by Tim C 1 in Mathematics

The ozone layer is found in which layer of the atmosphere? (Points: 3)
troposphere
stratosphere
mesosphere
thermosphere

. Which gas is found in the greatest abundance in the modern atmosphere? (Points: 3)
oxygen
helium
hydrogen
nitrogen


3. Earth’s early atmosphere was shaped initially by which of the following? (Points: 3)
outgassing of volcanoes
photosynthesis of land plants
respiration of mammals
moving clouds


4. The atmosphere is heated most by which of the following? (Points: 3)
radiation
conduction
convection
wind


5. Converging trade winds produce a calm region called _____________. (Points: 3)
horse latitudes
doldrums
trade winds
westerlies

2007-12-15 11:16:00 · 3 answers · asked by Jackie 2 in Earth Sciences & Geology

2007-12-15 11:14:55 · 7 answers · asked by Smart_Guy 1 in Mathematics

Does anyone know where on the net there is a stress-strain graph for some kind of plastic?

2007-12-15 11:14:40 · 3 answers · asked by Nightwing 2 in Physics

Could somebody please help me understand my science project?

I need a circuit that has 2 switches that work independently in parallel. They could control anything, lights, motor etc.

Anygood sites out there with examples?

Anygood ideas?

:)

2007-12-15 11:13:40 · 3 answers · asked by cake.faced (?) 2 in Engineering

I am by NO means an expert in genitics but this would make a really cool ( deadly too ) creature

2007-12-15 11:09:04 · 7 answers · asked by Anonymous in Biology

My crazy relative is trying to prove she is the illegitimate child of my paternal uncle (as well as my maternal half-sister). She talked an equally nutty relative (my uncle's legitimate daughter) into doing DNA test. The result was (according to them) that there is a 17% likelihood of their being related. Everyone involved is of the same ethnicity and national origin.

Am I right in understanding that this result is essentially "random"?

Please -- I am looking for a serious scientific answer. This is not a joke, and the accusation is very hurtful to my uncle's widow, who is over 80.

2007-12-15 11:02:14 · 9 answers · asked by Lisa B 7 in Biology

2007-12-15 11:01:40 · 9 answers · asked by angelazul 2 in Mathematics

i dont get it.....

2007-12-15 10:53:56 · 21 answers · asked by ♥mandii♥paigey&&addy♥ 1 in Astronomy & Space

2007-12-15 10:50:39 · 7 answers · asked by dude 1 in Biology

2007-12-15 10:47:35 · 62 answers · asked by kay-g 2 in Earth Sciences & Geology

Given that m divides n, how do I find a homomorphism where phi(Z_n) = Z_m ?

2007-12-15 10:45:19 · 2 answers · asked by Randall N 1 in Mathematics

How do I show that

phi: Z_12 ===> Z_10

defined by phi(x) = 3x is not a homomorphism?

Be as specific as you can, please. Thanks for the help!

2007-12-15 10:41:22 · 1 answers · asked by Randall N 1 in Mathematics

How much current can be drawn from a 1.5V AA alkaline battery? How much current can be drawn from a 1.2V AA NiMH battery?

2007-12-15 10:40:59 · 8 answers · asked by electric 3 in Engineering

Why can't there be a homomorphism from Z_16 onto Z_2 (+) Z_2?

Note: (+) means external direct product

2007-12-15 10:39:46 · 2 answers · asked by Randall N 1 in Mathematics

Write the product as a sum: sin 50 cos 30

2007-12-15 10:39:34 · 3 answers · asked by warsane b 1 in Mathematics

Suppose that phi is a homomorphism from Z_42 onto a group of order 6. What is the kernal of phi?

2007-12-15 10:37:53 · 1 answers · asked by Randall N 1 in Mathematics

Would the planet be better off without them ?

2007-12-15 10:35:13 · 10 answers · asked by dB 4 in Earth Sciences & Geology

2007-12-15 10:31:41 · 29 answers · asked by Diana * 2 in Astronomy & Space

When punnet squares for dominant and recessive genes are drawn for people, do they imply nucleic DNA or mitochondrial DNA? In a plant's punnet square, is it either of those or chloroplastic DNA? What are the differences?

2007-12-15 10:29:58 · 2 answers · asked by Anonymous in Botany

without looking too deeply into it i thought i would ask this on yahoo answers.
my boss at work said that the reason we are not floating away into space is because a magnet in the middle of the earth is pulling us all towards it. I did not agree. What is the answer?

2007-12-15 10:19:40 · 7 answers · asked by Anonymous in Physics

This is a Gr.12 Advanced Functions question?

2007-12-15 10:14:44 · 2 answers · asked by Omeed A 2 in Mathematics

given cosu=-2/7 and pie/2

2007-12-15 10:11:31 · 2 answers · asked by warsane b 1 in Mathematics

2007-12-15 10:09:36 · 7 answers · asked by Anonymous in Weather

x^2 + y^2 = 9; y - x = 3

2007-12-15 10:08:42 · 2 answers · asked by chriskel8706 1 in Mathematics

Which charge of O2 would give a bond order of O2?
a)-2 b)-1 c) +1 d) two of these f) none of these

A solution is made by dissolving 60.0 g of AlCl3 in enough water to make 250.0 mL of solution. How many moles of ions are in 5.00 mL of solution?

Any help would be appreciated! thank u

2007-12-15 10:08:11 · 1 answers · asked by loone 2 in Chemistry