Science & Mathematics - 28 November 2006

A) Can you please telll me the history of the mineral (like what country started using it first as a birthstone ,or what myths or legends are associated with it )

B) Is the stone precious or semi-precious?

C) What's the chemical composition ?

2006-11-28 11:13:00 · 2 answers · asked by ♪♫Lynn♫♪ 5 in Chemistry

I have to do a lab and explain my chi square data except I don't really understand how to get it. If you could just explain to me how you do it, i'd really appreciate it.

2006-11-28 11:12:13 · 1 answers · asked by nitzy: the man u fan! 4 in Biology

2006-11-28 11:11:33 · 3 answers · asked by Anonymous in Chemistry

My science book says that astronomers estimate that there may be more than 200 billion billion stars... is that a typo?

2006-11-28 11:11:07 · 9 answers · asked by Deb 1 in Astronomy & Space

Question: It is your mission to determine how many people and animals were at the Christmas post card area.

The Christmas season has begun. I walked into the mall and saw christmas decorations everywhere. In the main court there were many people lined up to have their picture taken and made into post cards. There was a Santa Claus several elves (helpers), and a small herd of reindeer. I counted a total of 15 heads and a combination of 46 legs (feet and hooves).

People and reindeers walk differently.

2006-11-28 11:11:01 · 5 answers · asked by crayola 2 in Mathematics

Suppose f : D → R with x0 an accumulation point of D. Assume L1 and L2 are limits of f at x0. Prove L1 = L2

(definition of the limit of a function)

2006-11-28 11:10:51 · 2 answers · asked by MMM 1 in Mathematics

Marie bought three dresses duringthe spring sale. One dress cost $34.95, one cost $27.50, and the other cost $19.95.

2006-11-28 11:09:28 · 14 answers · asked by jessica s 1 in Mathematics

metre and centimetre

2006-11-28 11:08:57 · 8 answers · asked by Annie andersaon 1 in Zoology

I need a good topic that wouldn't be too general or too common. Nobody should think of it so easily, it's better if its something like a audio-visual display, a visual display, a fixed model or a working model (no experiments), that a pair of thirteen-year-olds can handle by themselves. It would be nice even if its another simple topic, even under 'Organic Chemistry' or 'Medicinal Chemistry'.

2006-11-28 11:08:49 · 2 answers · asked by imi 1 in Chemistry

2006-11-28 11:08:18 · 5 answers · asked by Anonymous in Engineering

I tried cubing it, but it comes up with a smaller number that I think is probably wrong. Any help?

2006-11-28 11:08:06 · 3 answers · asked by Truth 2 in Mathematics

2006-11-28 11:07:53 · 9 answers · asked by Anonymous in Physics

2006-11-28 11:07:49 · 11 answers · asked by Anonymous in Zoology

explain the concept of evolution by natural selection
thx

2006-11-28 11:07:15 · 1 answers · asked by Anonymous in Biology

2006-11-28 11:06:15 · 5 answers · asked by Dj NBT 1 in Mathematics

this stone is polished. it is like a form of black goldstone or something. it is very sparkly with a few bands of darker black.

2006-11-28 11:06:01 · 3 answers · asked by Anonymous in Earth Sciences & Geology

Iusualy go when I have to but I was at girl scout camp and I did not go cuz the bathrooms were nasty.

2006-11-28 11:05:50 · 5 answers · asked by Anonymous in Biology

2006-11-28 11:04:59 · 5 answers · asked by jenn 1 in Physics

2006-11-28 11:04:29 · 5 answers · asked by jucetan 1 in Mathematics

anynone knows a website i can go 2 see answers 2 my algebra homework problems...

2006-11-28 11:03:24 · 2 answers · asked by Anonymous in Mathematics

Call me easily amused but I've been messing with one for about half an hour and I'm starting to wonder if something like this should even be able to exist.

2006-11-28 11:02:23 · 6 answers · asked by Z, unnecessary letter 5 in Physics

what is the point of intersection between these two equations on a four quadrant graph: y=6-x
y=3x-10
thanks

2006-11-28 11:02:04 · 6 answers · asked by Trent N 2 in Mathematics

A farmer buys feed...
chicken feed cost .47 per ton
pig feed cost 1.23 per ton
cattle feed cost 1.44 per ton

the farmer can't buy any partial tons
how much of each would he have, if he bought 100 tons of feed and paid 100 dollars???

please help me i need it

2006-11-28 11:01:51 · 2 answers · asked by Anonymous in Mathematics

2006-11-28 11:00:43 · 3 answers · asked by sarahmuaaz 1 in Chemistry

Why?

2006-11-28 10:59:41 · 7 answers · asked by Eagle 2 in Zoology

2006-11-28 10:58:29 · 6 answers · asked by jenn 1 in Physics

I like to look at the stars/ Can anyone direct me where I might find a website or something in San Diego?

2006-11-28 10:57:52 · 4 answers · asked by Linda L 1 in Astronomy & Space

2006-11-28 10:56:51 · 5 answers · asked by jenn 1 in Physics

2006-11-28 10:55:46 · 0 answers · asked by Dj NBT 1 in Mathematics

Physics 2 Engineering

2006-11-28 10:52:22 · 1 answers · asked by krys_himura 1 in Physics