Science & Mathematics - 8 September 2007

2007-09-08 12:11:54 · 1 answers · asked by Anonymous in Chemistry

2007-09-08 12:11:12 · 1 answers · asked by Roxy 3 in Chemistry

in kansas city, kansas parents are questioning darwins theory of the scientic method

2007-09-08 12:04:37 · 10 answers · asked by awtson 1 in Biology

Is this derivation really correct? Or is there somewhere a mistake? If so, where?

2 = 1
******

Suppose: a = b

It then follows that

a * a = a * b

a^2 = a * b

a^2 - b^2 = a * b - b^2

(a - b) * (a + b) = (a - b) * b

a + b = b

a + a = a

2 * a = 1 * a

2 = 1

2007-09-08 12:02:05 · 7 answers · asked by Anonymous in Mathematics

Glucose is the major energy yielding nutrient for most cells. Assuming a cellular concentration of 1 mm (I think this means millimoles?), calculate how many molecules of glucose would be present in a hypothetical (and spherical) eukaryotic cell. (Avagadros number, the number of molecules in 1 mol of a nonionized substance, is 6.02 x 10^23)

The answer to the question is 3.9 x 10^10 molecules, but how do they get that answer? Thank You

2007-09-08 12:01:55 · 3 answers · asked by dfgh d 1 in Chemistry

2007-09-08 11:56:22 · 4 answers · asked by Anonymous in Other - Science

Often in fiction there are secret headquarters that are completely self contained. What kind of electrical generators, in reality, could be operated and sustained without the knowledge of people within the vicinity of a "secret headquarters"? I ask this because I was wondering how feasible this is in real life with existing technology.

What might work and how might it work?

2007-09-08 11:50:38 · 4 answers · asked by Yahoo Sucks 5 in Engineering

Suggest how the behaviour of the compound C6H5CH2Cl with hot KOH differs from that of C6H5Cl and from that of C6H5CH2CH2Cl. In each case, state the type of reaction undergone (if any) and write the formula of the product.

2007-09-08 11:50:13 · 1 answers · asked by Nilesh R 1 in Chemistry

is 142°10' the same as 142°? i don't think so, but what does that 10' mean??

2007-09-08 11:49:16 · 3 answers · asked by paulinatran10 1 in Mathematics

Just wondering, I think it could be a asteroid or maybe global warming

I knwo the sun won't die for another billion years or somethinglike tht..

2007-09-08 11:48:03 · 12 answers · asked by Alan 3 in Astronomy & Space

Long ago, Ptolemy had a theory of the cosmos with an accurate, yet incorrect, mathematical model for it. His version made assumptions that were inconceivable, because they were impossible. I have been told that quantum theory makes assumptions that seem ridiculous, but they must be true because the mathematical model is so incredibly accurate. What are these assumptions? Also, how do we know that it isn't the case that quantum theory is accurate, yet incorrect as the Ptolemic universe was?

2007-09-08 11:48:02 · 6 answers · asked by hammerthumbs 4 in Physics

1. lim [(3/x-2)- (3x/x^2-4)]
x->2+

2. lim [(3/x-2)- (12/x^2-4)]
x->2+

2. lim [(2/x-2)- (6x-x^2x^2-4)]
x->2+

2007-09-08 11:47:15 · 3 answers · asked by Obser V 1 in Mathematics

What household items would cause an explosion or a very large fire if they came into contact with a match or lighter?

2007-09-08 11:45:06 · 3 answers · asked by Anonymous in Chemistry

If 455 g Be(OH)2 were to react with 835 g V(CN)3 , and 437 g of Be(CN)2 and some V(OH)3 were formed, what would be the percent yield of this reaction?

2007-09-08 11:44:42 · 1 answers · asked by Anonymous in Chemistry

Why doesn't this equation extend into the negative xy and zx plane?

2007-09-08 11:44:16 · 3 answers · asked by math q 2 in Mathematics

I am trying to get some hydrogen and oxygen from water and I want to make sure it is safe. I know they "purify" tap water by adding chlorine to it, so does the electrolisizing process make this experiment deadly?

2007-09-08 11:44:11 · 1 answers · asked by Nevada 2 in Chemistry

2007-09-08 11:42:24 · 10 answers · asked by shaquan_mcdowell123 3 in Zoology

How are water molecules able to make up to 4 hydrogen bonds with other molecules? I thought it would be 3 - the oxygen is attracted to another molecule's hydrogen, and each of the 2 hydrogens attracted to the oxygens of 2 other molecules. Can someone explain?
Also, on a website it said "The stronger the bonds, the more ordered and static is the resultant structure. The energetic cost of the disorder is proportional to the temperature, being smaller at lower temperatures." What does it mean by this? especially "energetic cost"
The site is http://www.lsbu.ac.uk/water/hbond-easy.html in case u need to see it in context.
I'd appreciate any help!

2007-09-08 11:41:42 · 3 answers · asked by Razzledazzle010 2 in Chemistry

http://i41.photobucket.com/albums/e291/stellalawson/greenfrogonwallofhouse.jpg

I live in South Texas on the coast. My mother-in-law took this picture, so I'm not sure how big the froggie was. Any ideas?

2007-09-08 11:41:10 · 5 answers · asked by carla ツ 5 in Zoology

1) I am very shy and worried that I won't be able to find a partner for the lab components or that I won't be able to go to the front of the room and get equipment ...this happened a lot in high school
Although, I understand everything ...I'm a social retard

2) How difficult is it compared to most degrees? In your experience...

2007-09-08 11:40:11 · 3 answers · asked by Anonymous in Physics

2007-09-08 11:40:04 · 1 answers · asked by JAMES 4 in Physics

would kill some1?

2007-09-08 11:35:13 · 7 answers · asked by Anonymous in Medicine

I know there has been some work on this, but it is now so de-bunked I wonder if we may be missing some thing.

2007-09-08 11:34:40 · 10 answers · asked by Anonymous in Physics

If you multiply me by 2, subtract 1, and read the reverse the result you'll find me. Which numbers can I be?

2007-09-08 11:34:20 · 7 answers · asked by Anonymous in Mathematics

I need to solder something, but i don't have a soldering iron, or any expirience soldering stuff...

I wanna know if there's any way to do what i need to do without the iron, using household items or something...

2007-09-08 11:33:24 · 7 answers · asked by BallerBaller 2 in Engineering

a. windpipe
b.diaphragm
c.blood

2007-09-08 11:32:45 · 3 answers · asked by geidy p 1 in Biology

What is an example of

- Wave Communication?
- Telecommunication?
- Graphic communication?
- and machine-to-people?

2007-09-08 11:31:44 · 2 answers · asked by LiveTheLife YouLove ღ 3 in Engineering

Which of these are correct IUPAC names:

3-isopropyloctane
3-ethyl-2-methyl-3-propylpenta...
3-ethyl-2-methyloctane
2,2-dimethyl-4-pentanol
N-ethyl-2-pentanamine
methyl ethyl ether
2-isopropoxybutane
2-sec-butoxyisopropane
4-hexylcyclobutane
3,3,4-trichloro-2-hexanol

2007-09-08 11:29:59 · 3 answers · asked by bdgurl5388 1 in Chemistry

i was with my grand mother going to hazel del washington and i thot about that so how do thay stick to medal

2007-09-08 11:27:01 · 6 answers · asked by broken souls 5 in Other - Science

....on the island of Hawaii since Kilauea lava is changing direction towards Hilo, instead of the sea?

I have no plans to move from the Big Island.

2007-09-08 11:24:51 · 1 answers · asked by Agent319.007 6 in Earth Sciences & Geology