Science & Mathematics - 12 December 2007

If the weight of something increases from 15 grams to 21 grams.

Can someone explain as simply as possible how to calculate the percentage increase?

Cheeres

2007-12-12 17:15:19 · 11 answers · asked by Chimera's Song 6 in Mathematics

2007-12-12 17:12:31 · 4 answers · asked by ★shoosh★ 4 in Medicine

write the electron configuration and orbital diagrams of the folowing elemnts and detemine the electron valences!!

1. o:z=8

2. n:z=7

3. ar.z=18

4.v.z=23

thnaks person if correct or most correct will get 10 pionts promise

2007-12-12 17:07:21 · 1 answers · asked by lola 1 in Chemistry

In Thermal Power Plant, we have ordered this paint code, but i want to know that what actually the colour is?

2007-12-12 17:04:17 · 2 answers · asked by deepak_8584 1 in Engineering

explain the emission of light by hydrogen atom and all other atoms



10 points for 1st correct answer

2007-12-12 17:03:53 · 1 answers · asked by lola 1 in Chemistry

because weird things are always happening. things fall and break, i hear noises, i feel like im being watched, i feel like im being followed, i'm literally terrified of walking through my house in the dark, things move for no reason without falling, i hear people talking to me and i feel like there's someone with me and it's not a happy feeling.

and do not tell me im crazy because i will report you.

2007-12-12 17:00:25 · 15 answers · asked by Anonymous in Parapsychology

Food contains both purine and pyramidine bases. But, from the books and teachers, we learned that the cell adops the denovo synthesis or salvage pathway.
But my question is:
Why are exogenous purines and pyramidines not incorporated into the cell's DNA/ RNA?

My postgraduate student posed this question. I went through couple of biochemistry and molecular biology books. And I also googled. I need an answer to satisfy student.

2007-12-12 16:59:04 · 3 answers · asked by The Knowledge Server 1 in Biology

(a) 9/2 (b) –2/9 (c) 2/9 (d) ∞

2007-12-12 16:58:13 · 2 answers · asked by tony2007 2 in Mathematics

2007-12-12 16:56:34 · 1 answers · asked by Raj 1 in Biology

y = x^3 - 15x^2 + 27x where -1<=x <= 2, now find the absolute minimum of this function.

2007-12-12 16:56:21 · 5 answers · asked by ? 1 in Mathematics

A: 1 1/2
B: 1.17
C: 1.25
D: 1.27

2007-12-12 16:50:47 · 5 answers · asked by acuraboy1978 2 in Mathematics

HF(g) + BF3 (g) ---> ????????????

is it no reaction

2007-12-12 16:50:18 · 2 answers · asked by poo 2 in Chemistry

I don't need exact measurements... a rough idea would be fine.

Thanks.

2007-12-12 16:50:08 · 17 answers · asked by Joe Bloggs 4 in Astronomy & Space

http://www.news.com.au/story/0,23599,22879895-13762,00.html

I found an article about making cows and sheep more environmentally friendly using roo stomachs, I'm wondering what the moral and ethical issues would be associated with such a thing, religious imput wouldn't be so bad either.

I'm wondering what other people views of this would be.

debate whether it's positive or negative if possible

2007-12-12 16:49:07 · 2 answers · asked by ? 3 in Zoology

Find the volume of the solid bounded by the paraboloids z = 3x^2 + 3y^2 and z = 4 - x^2 - y^2.

2007-12-12 16:43:30 · 1 answers · asked by celes 1 in Mathematics

Ca= 21.05%
S=16.84%
O= 58.95%
H= 3.16%
H20= 28.42%

2007-12-12 16:33:00 · 1 answers · asked by Anonymous in Chemistry

i have to do a project in science and im doing a board game, im doing it like monoply, and i need to know what stuff that can be found on mars, so that they can be the stuff that you buy. i need these answers asap please thankyou.

2007-12-12 16:32:01 · 8 answers · asked by becka 2 in Astronomy & Space

2007-12-12 16:30:52 · 4 answers · asked by need 2 get a grip 3 in Earth Sciences & Geology

2007-12-12 16:29:28 · 2 answers · asked by rzafar22@sbcglobal.net 1 in Earth Sciences & Geology

I'm doing some homework for Algebra II and need help with this one problem!
Please help!

14. Solve the system of equations.


2r+ 6s+ 4t=16
r+3s+2t=8
-5r+2s-3t=1

2007-12-12 16:28:30 · 6 answers · asked by upsetness 2 in Mathematics

As the title says. I thought the greater the p your experiment is more correct. For my experiment I used three classes of beans and got about 80-70% p in my results. I thought this was good because my expected was kinda close to my observed result, (about 6 away from expected). I read online though that its the opposite or something like that and that the farther away from .05, the less reliable it is. The closer it is to .05 then that means the more likely it occurred by chance and the farther from .05 the more likely it was biased and something affected the results??? Can someone please explain to me what exactly p stands for??? I am very confused...

2007-12-12 16:28:01 · 4 answers · asked by Anonymous in Biology

When going in for surgery wouldn't you just need an anesthetic to remove the pain and a sedative to make you go to sleep, why would a paralytic be used? There seems to be no reason to cut off the control of the muscles.

2007-12-12 16:27:01 · 6 answers · asked by Anonymous in Medicine

what is the empirical formula of a molecule containig
65.5% carbon
5.5% hydrogen
29.0%oxygen

2007-12-12 16:25:35 · 2 answers · asked by Babyblue_gurl3 1 in Chemistry

could you tell me if this is correct. Are all the steps here for this problem ?

2x^2+4(3x-x^2)+3x

2x^2 + 12x - 4x^2 + 3x

-2x^2 + 15x

Did I leave out any steps

2007-12-12 16:20:15 · 10 answers · asked by Maggie L 1 in Mathematics

Is there anything like it which does not require a perscription???

2007-12-12 16:19:03 · 0 answers · asked by kismet 7 in Medicine

i just need the answer

2007-12-12 16:17:09 · 10 answers · asked by Anonymous in Mathematics

the teacher prepared the cation solutions using compounds that contain the nitrat ion. For example, the solution marked Ca(+2) was prepared by dissolving Ca(No3)2 in water.

2007-12-12 16:17:03 · 2 answers · asked by helloo 1 in Chemistry

summarize the three key steps of transcription?
list two ways that processes of transcription and replication are similar?
list two ways that the end results of transcription and replication differ?
how does the name of each rna tell what it does?

2007-12-12 16:11:59 · 1 answers · asked by Anonymous in Botany

2007-12-12 16:11:09 · 12 answers · asked by lover 1 in Astronomy & Space

Ineed it for school...... answer quickly! Ineed to bring it in 2mrw... Plzzzz hurry!!!!!!!!!what is it?!

2007-12-12 16:10:17 · 2 answers · asked by SOOOO - SEXY!!! 1 in Weather