Science & Mathematics - 12 February 2007

2007-02-12 03:50:30 · 3 answers · asked by threeboysmamma 3 in Medicine

7/12 x 5/14 x3/5 x 4/7


7 3/5 + 6 2/3 divided by 4 1/6




7 3/4 divided by 5 1/6 1 5/9 divided by 2/13 (complex fraction)

2007-02-12 03:48:47 · 3 answers · asked by april p 2 in Mathematics

2007-02-12 03:46:20 · 21 answers · asked by Anonymous in Zoology

answers:
2 & 2/5 hrs
24/5 hrs
5 hrs
3 hrs

2007-02-12 03:44:00 · 13 answers · asked by Anonymous in Mathematics

A hypothetical metal has a body-centered cubic unit cell and its atomic radius is 1.172 Å. Calculate the edge length of the unit cell.

2007-02-12 03:43:28 · 2 answers · asked by AppleCard! 2 in Chemistry

Solve the equation: 4sin 2x + 3 cos 2x = 2

I'm confused by the 2x bits otherwise I could do it!!

Please help me by pointing me in the right direction!!

(Don't bother posting answers saying do your own homework, I have tried, I cant answer this one question so am asking for help!!)

2007-02-12 03:43:27 · 7 answers · asked by Emma C 4 in Mathematics

2007-02-12 03:42:39 · 1 answers · asked by goring 6 in Earth Sciences & Geology

For the reaction

C4H8 (g) → 2C2H4 (g)

Ea / R = 31513.110 K
A = 4.098 × 1015 s−1

A conversion reaction of the type above takes place at 755 K and an initial concentration of cyclobutane of 0.0350 M What is the concentration of cyclobutane after 30.00 seconds ?

Note: I got an answer, but it's wrong. (=0.006120)
help pls!

2007-02-12 03:40:58 · 1 answers · asked by Tommy 2 in Chemistry

2007-02-12 03:39:03 · 16 answers · asked by Anonymous in Mathematics

answers:
x=8
x=-8
x=0
none

2007-02-12 03:34:58 · 6 answers · asked by Anonymous in Mathematics

2007-02-12 03:34:03 · 4 answers · asked by ORLANDO N 1 in Engineering

2007-02-12 03:33:27 · 7 answers · asked by andrea j 1 in Engineering

why does:

sin4x=2sin2xcos2x
-2integral2 sin2xcos2xdx
etc..


where did the -2 out in front come from?!

2007-02-12 03:31:45 · 2 answers · asked by Anna 2 in Mathematics

2007-02-12 03:31:34 · 13 answers · asked by Chesh » 5 in Physics

Help appreciated

2007-02-12 03:30:17 · 1 answers · asked by rosh n 1 in Chemistry

I can't quite remember what exactly makes a glucose molecule D or L. When in the Fisher projection but not in ring form, a glucose molecule has a chain of 6 carbons. #1 carbon is the CHO and #6 C is the CH2OH. Each carbon in between has a OH and a H attached to it. For the D-glucose, the OH is: #2 - right; #3 - left; #4 - right; #5 - right. I know that for L-glucose, the OH on one of the carbons is reversed (i.e. it goes from on the right to on the left). I can't remember which carbon it flips on: #2 or #5.

2007-02-12 03:28:23 · 3 answers · asked by Anonymous in Chemistry

I have to find information about stem cells and SCNT. I need a good website!! Please and Thank You!!!

2007-02-12 03:27:58 · 1 answers · asked by whiskeygirl_j 1 in Medicine

1. How do man's teeth indicate that he is an omnivorous animal?

2. What are the special functions the stomach performs?

3.Describe the mechanics of digestion as food passes through man's digestive system.

2007-02-12 03:26:03 · 2 answers · asked by me1026 1 in Biology

2007-02-12 03:26:02 · 3 answers · asked by allowmm 1 in Mathematics

2007-02-12 03:25:45 · 12 answers · asked by george b 1 in Physics

Can you give me an example of a number solidly representing something, in more occurances that to negate the probability of it?

What I'm getting at is are there 'powerful' numbers (with lots of use and importance) and 'weak' numbers (with relative less importance and use).

Most importantly, why??

Sorry to confuse you, I couldn't think of a better way to word this.

2007-02-12 03:24:22 · 8 answers · asked by Anonymous in Other - Science

How can I convert:
1) Ethanol to 1-bromo propane
2) Ethene to methanal
3) 2-methyl propene to ethanal??
Thanks in advance.

2007-02-12 03:23:39 · 2 answers · asked by beachblue99 4 in Chemistry

2007-02-12 03:23:10 · 1 answers · asked by mostafa a 1 in Engineering

2007-02-12 03:21:24 · 27 answers · asked by heatherberlemont 1 in Physics

2007-02-12 03:21:11 · 1 answers · asked by goring 6 in Earth Sciences & Geology

2007-02-12 03:20:48 · 8 answers · asked by Z 1 in Zoology

Or how are oxidation reactions used to cause explosions?

2007-02-12 03:20:03 · 1 answers · asked by Naima! 3 in Chemistry

As! If in the mathematical graph of Tarcísio Brito, the alternating day of the night if repeats of the circular form of a pulse of the detonation (24 hours), in the market of the life, our alternating history of pag-History, to circulate complete if in 24 a thousand years. Repeating this the same market of the infinite in the past and the future.

2007-02-12 03:18:06 · 3 answers · asked by britotarcisio 6 in Mathematics

2007-02-12 03:17:27 · 5 answers · asked by Brian S 2 in Weather

2007-02-12 03:16:23 · 23 answers · asked by Dan 4 in Weather