Science & Mathematics - 15 February 2007

and why does ethanol mix with water?

the chemical formula for ethanol is C2H5OH

octane(gasoline) : C8H18

2007-02-15 15:26:57 · 5 answers · asked by Travis 2 in Chemistry

What areas around the world are most vulnerable to earthquakes and why? What are the major problems dealing with earthquakes in different areas?

2007-02-15 15:25:11 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Their capitals too if you could please!!!

2007-02-15 15:25:02 · 5 answers · asked by «Juke» 1 in Geography

1)along what line of longitude dose the northeast border of california lie

2)what large desert in africa is almost as big as the forty-eight contiguous states in the U.S.

3)what is the capital of montana,the state with the forty largest land areas in the U.S.

4)what is the capital of the only state that as a coastline on the gulf of mexico and where the 100 degree west longitude line passes throght the state

5)which city dosent lie near the mexican border:El paso,san francisco,laredo.

6)what european city is near the inersection of the 60 degree north lattitude and 30 degree east longitude

7)if one inch on a map=500 miles then from chicago to cleveland is half of an inch. how far whould this be

2007-02-15 15:23:52 · 1 answers · asked by Jesse H 1 in Geography

In a certain state the automobile license plates consist of two letters followed by a four-digit number. How many distinct license plate numbers can be formed?

Can you please show me how to do this problem, i already know the answer its 6,760,000 but i don't really understand how to do it.

2007-02-15 15:21:40 · 5 answers · asked by elizabeth g 2 in Mathematics

Not as easy as it sounds. =| since yahoo won't let me write/type this equation out properly, the link to the picture is: http://img259.imageshack.us/img259/8906/asdavg7.jpg
I need to solve for x in terms of a. Thanks in advance!

2007-02-15 15:20:39 · 2 answers · asked by Anonymous in Mathematics

2007-02-15 15:18:11 · 10 answers · asked by «Juke» 1 in Geography

2007-02-15 15:17:06 · 9 answers · asked by dima3488 1 in Geography

Their capitals too if you could please!

2007-02-15 15:16:40 · 3 answers · asked by «Juke» 1 in Geography

You can also tell me the answer. I want the azimuth of the moon anytime between February 17, 2007 - February 28 2007.

I need at least two days.

2007-02-15 15:15:25 · 4 answers · asked by Ryoma Echizen 3 in Astronomy & Space

Find x:

((log base 4)*(5*sqrt 2))^2 - ((log base 4)(x^4)) - 5 = 0

2007-02-15 15:14:50 · 2 answers · asked by Anonymous in Mathematics

2007-02-15 15:13:21 · 6 answers · asked by tarik a 1 in Weather

By the way, the reaction I speak of in the title is photosynthesis, so Take into account the formula for photosynthesis: 6CO2(g) + 6H2O(l) → C6H12O6(s) + 6O2(g). And, glucose's molar mass: 180 g/mol

Thanks in advance for the help!

2007-02-15 15:10:37 · 3 answers · asked by Random G 3 in Chemistry

and i need help with this...Log9 (x+4) + log9(x-4)=1

thanks!

2007-02-15 15:08:01 · 5 answers · asked by Zac 2 in Mathematics

There are four charges on the four corners of a square, the two on the right are negative, and the two on the left are both positive, they all have the same magnitude, Q, and the edges of the square are S. What is the magnitude of the electric field at the center of the square in terms of Q and S?

2007-02-15 15:07:02 · 1 answers · asked by Kevan G 1 in Physics

ok i need to know what the young,male,and the female of the following species are called:deer,duck,elephant,fox,goose,sheep,swine,whale,swan,rabbit,kangaroo,goat,lion,seal and cattle

(ex.male chicken is rooster female is hen young is chick)

thanks

2007-02-15 15:06:55 · 3 answers · asked by Anonymous in Zoology

I am considering doing laser eye surgery in April and have been visiting various places...most places quote me prices around $5000...one place though which is located in the financial district of Toronto, Canada where I live offeres surgery from as low as $ 500 an eye (place is called LASIK MD)...i find that a little troubling...they say they offer it this low because of the sheer volume that they do and they can afford to offer it this low...im just wondering what to do?

2007-02-15 15:04:49 · 8 answers · asked by Louisa C 2 in Medicine

2007-02-15 15:03:48 · 3 answers · asked by tarik a 1 in Weather

how does saturn looks like? where can i view it? i have 4.5'' telescope? please suggest me

2007-02-15 15:02:38 · 3 answers · asked by eminent_youtom 1 in Astronomy & Space

2007-02-15 15:02:24 · 3 answers · asked by Anonymous in Chemistry

1. 5 < x + 1
2.3a > 4
3. y - 6 < 9
4.-2n < 10
5. b/3 > 1/3
6. p/-2 < -5
7. r + 8 > 12
8. j - 7 < 24
9. h - 5 > -16
10. 8 + b < -13
11. 3k < -27
12. h/4 > 16
13. 9 < a/6
14. -7z < 21


wee. thx guy(in advance.. : ])

2007-02-15 15:00:42 · 7 answers · asked by Anonymous in Mathematics

i just got a battery and it says 12 volts 5 amps how many amps per hour can it put out is it 5 ?

2007-02-15 15:00:14 · 6 answers · asked by Tony W 1 in Engineering

Hey everyone! I've spent about 3 hrs on this problem and can't seem to find an answer, so here goes:
When yellow mice are mated together, 2/3 of the progeny are yellow, 1/3 are agouti. Another locus is known to govern pigment production. When parents heterozygous at this location are mated, 3/4 of the offspring are colored, 1/4 are albino. These albind mice can not express whatever alleles they have at the agouti locus. A yellow mouse is crossed with an albino and produces an F1 containing 1/2 albino, 1/3 yellow, and 1/6 agouti.

I've figured out that the only way to get the 2:1 phenotypic ratio between yellow and agouti is to consider the dominant yellow allele, when homozygous, to be lethal. I understand that it is not lethal when the recessive albino allele is homozygous. Past that I'm stuck. I feel like I've tried everything!

2007-02-15 14:58:04 · 2 answers · asked by ? 2 in Biology

You have an unknown with and observed melting point of 90-93*C is your unknown compound A with a reported melting point of 95.5-96*C or compound B with a reported melting point of 90.5-91*C? Explain.

2007-02-15 14:57:25 · 4 answers · asked by diana t 1 in Chemistry

Let f(x) = x3 − 5. Estimate the following to within two decimal places by using small enough intervals.

i found:

f'(3)= 27
f'(-2)= 12
f'(7)= 147

Determine a formula for f′(x). (how do u do this part???) i thought it would be x^3 but thats not right

2007-02-15 14:56:22 · 2 answers · asked by Diggler AKA The Cab Driver 1 in Mathematics

I think I'm suposed to be familiar with this, but I forget exactly what it means. I can't locate a good definition on the net, but I have a *vague notion of how to do it, and also that it is good for charts. I'm starting in calc-1 and I think this will be usefull/nescessary. Thanks in advance.

2007-02-15 14:53:46 · 2 answers · asked by RogerDodger 1 in Mathematics

Why is the final product from crystallization process isolated by vacuum filtration and not by gravity filtration?
crystalization?

2007-02-15 14:52:12 · 4 answers · asked by diana t 1 in Chemistry

I don't believe in evolution and i forgot to pay attention to the lesson so yeah please help!

2007-02-15 14:51:25 · 11 answers · asked by Anonymous in Biology

Sue has 25 coins in nickels, dimes, and quarters. The number of dimes exceeded the number of nickels by four. How many of each? If you could show your work, that'd be great.

2007-02-15 14:50:50 · 10 answers · asked by Lola 4 in Mathematics

I need this quickly!!! Scat is poop if u didnt know.

2007-02-15 14:50:32 · 2 answers · asked by Allison 3 in Zoology