Science & Mathematics - 21 December 2007

to work out standard index form (gcse maths)

2007-12-21 04:20:23 · 3 answers · asked by Anonymous in Mathematics

Something about triangulation, I think???

2007-12-21 04:16:09 · 4 answers · asked by Jansen J 4 in Astronomy & Space

2007-12-21 04:10:40 · 5 answers · asked by Jesse Y 1 in Engineering

2007-12-21 04:10:06 · 8 answers · asked by pinkparadiseforever 2 in Mathematics

2007-12-21 04:07:05 · 3 answers · asked by Gabriela M 1 in Earth Sciences & Geology

you know like def con 2 or something? because I see kids able to use this as quick or faster because of younger minds or perhaps a chip implanted in hospitals while young?

2007-12-21 04:07:00 · 5 answers · asked by Anonymous in Parapsychology

2007-12-21 04:01:41 · 8 answers · asked by malkana d 2 in Mathematics

Problem #1:
Aluminum oxide is formed from the reaction of metallic aluminum with oxygen gas. How many moles of Aluminum are needed to form 3.4 moles of Aluminum oxide?
Hint: This is a simple ratio problem. Just use the molar ratio from the balanced equation. This was covered in 5.09. Mass is not involved.

Problem #2:
Determine the number of grams of NH3 produced by the reaction of 3.5g of hydrogen gas with sufficient nitrogen gas. (Check for diatomic elements).
Can U Show me how 2 balence and how 2 and what 2 cancel.
PLEASE I NEED YOUR HELP!

2007-12-21 03:54:07 · 6 answers · asked by Monica Yuzuma 1 in Chemistry

C4H10
C2H6
C5H12
CH4
C3H8

2007-12-21 03:52:34 · 2 answers · asked by JESUS G 1 in Earth Sciences & Geology

Allergies or asthma?
Every morning I wake up with a stuffey nose and a headace.
I always have to take aspirein. I worry about my stomach lining. What could be causing these headaches?

2007-12-21 03:41:39 · 5 answers · asked by S i r i 1 in Medicine

If you could, would you go on a manned mission to Mars?
Knowing full well you wouldn't see family and friends for a MINIMUM of two years, and that the mission would be fraught with danger, and an innate fear of the unknown?
Why or why not?

2007-12-21 03:39:10 · 10 answers · asked by Bobby 6 in Astronomy & Space

ya know, the one that they wouldnt say on tv because it would make bad stuff happen. does anyone know the name, and how do you know it?

btw, talk to me if youhave a Myspace (myspace.com/caws123)

2007-12-21 03:38:28 · 8 answers · asked by Anonymous in Paranormal Phenomena

something you thought was paranormal, like hauntings, demonic possessions, spirits or ghosts?

2007-12-21 03:36:46 · 6 answers · asked by wildsherired 1 in Paranormal Phenomena

The other day i was on my PC and i took a break and i noticed the moon out of my window. It was a brilliant white half moon and for some reason i was transfixed and had to keep looking at it. After about 45 seconds the darkness started to work its way slowly across the moon until it completely disappeared. It was quite the unusual site, which is the first time i have ever seen it happen. Have you ever seen this happen?

2007-12-21 03:36:20 · 18 answers · asked by Anonymous in Astronomy & Space

The following is from Livescience.com concerning the myth about chickens living without a head:

"True, and not just for a few minutes. A chicken can stagger around without its noggin because the brain stem, often left partially intact after a beheading, controls most of its reflexes. One robust fellow lived a full eighteen months. Likely he was a real birdbrain, however. "

http://www.livescience.com/bestimg/index.php?url=myths_chicken_head_03.jpg&cat=myths

How is this even possible? The way this is stated, a chicken's body lived for 18 months. Wouldn't the body starve to death?

2007-12-21 03:35:39 · 12 answers · asked by Scott 2 in Biology

2007-12-21 03:32:06 · 18 answers · asked by art 4 in Weather

Can someone please help me with these triangle problems??


1. Triangle A B C is drawn with angle bisector B H from vertex point B to point H on side A C. Angle C B H is labeled 3x + 15. Given: Segment BH is the angle bisector of angle ABC. The measure of angle ABC = 105. Find the value of x.

2. Right triangle A B C is drawn with right angle B. The altitude of the triangle is drawn and labeled B D. It goes from vertex B to side A C. If AB=10 and AC=20, find AD.

2007-12-21 03:31:57 · 3 answers · asked by Anonymous in Mathematics

2007-12-21 03:31:24 · 7 answers · asked by Anonymous in Weather

2007-12-21 03:30:55 · 15 answers · asked by Thomas 1 in Agriculture

Please could you help me work out what mass would be needed, I got the answer as 84.5. But im unsure if its correct!

Equation: 2NaN3(s) ---------- 2Na(s) + 3N2(g)

What mass of sodium azide (2NaN3) would be needed to liberate 48dm3 of nitrogen? (Molar volume of gas is 24dm3mol-1)

2007-12-21 03:30:38 · 1 answers · asked by Anonymous in Chemistry

6 -√7 / 6 + √7

2007-12-21 03:29:04 · 3 answers · asked by mommawe'regoingtohell 1 in Mathematics

The rod has lenght L=1, occupies segment from (-1/2,0,0) to (+1/2,0,0) and its mass GM = 1 pulls the gas by gravitation.
As a result pressure at point (1,0) is Po =1.
How many moles of gas is under pressure greater than Po?

The rest of the data are mostly ones too:
length of the rod is L = 1,
mass of the rod is GM = 1,
temperature of gas is RT = 1,
molar mass of the gas is μ=1/2.

2007-12-21 03:23:33 · 2 answers · asked by Anonymous in Physics

2007-12-21 03:19:48 · 5 answers · asked by Alexander 6 in Mathematics

A.increasing variation
B.decreasing variation
C.eliminating variation

2007-12-21 03:14:26 · 4 answers · asked by ian t 1 in Botany

I just found a spider in my house and it's pretty small (~3/4 of an inch) and has a golden pattern on his abdomen and right before his spinnerets is another small, gold pattern. (I live in Quebec; not many venomous spiders)What kind of spider is this??

heres a pic i drew

http://s244.photobucket.com/albums/gg30/chicken_joefie/?action=view¤t=spider.jpg

(please don't pay attention to the legs. they're that color but not that shape)

2007-12-21 03:13:22 · 2 answers · asked by Anonymous in Zoology

2007-12-21 03:11:11 · 6 answers · asked by mzkent9 1 in Mathematics

1.NaCl
2.MgF2
3.CCl4
5.C6H6

2007-12-21 03:10:03 · 1 answers · asked by Kelly 1 in Chemistry

An egg laying mammal.

2007-12-21 03:04:02 · 7 answers · asked by Rick G 4 in Zoology

what is the recommended polyacrylamide gel percentage for protein size 15kD and 34kD?
do any one have a website to recommened?
previously i tried using 7.5% gel, is that really recommended or am i to use higher percentage?
thank you in advanced. : )

2007-12-21 03:03:49 · 4 answers · asked by Anonymous in Biology

okay so......

I need to find:

1) the mass of 350.0 L of Nitrogen, N2 at STP

2) What is the mass of 43.231 moles of Cu

3) How many moles are in 3.56 x 10^32 of N2

4) How many moles are in 4.38 x 10^42 atoms of zinc

5) how many atoms are in 2.41 x 10^24 molecules of water (H2O)

6) how many moles are in 403 grams of SO4

THANK YOU

-Colorado Boy

2007-12-21 02:55:58 · 4 answers · asked by Anonymous in Chemistry