Science & Mathematics - 3 October 2006

is 1 a prime or composite number?????is 1 a squar number?

2006-10-03 09:20:41 · 6 answers · asked by Anonymous in Mathematics

A sample of a compound containing C,O and silver (Ag) weighed 1.372g. On analysis it was found to contain 0.288g O and 0.974g Ag. The molar mass of the compound is 308.8 g/mol. from this data how can I determine the empirical and the molecular formulas of the compound.

2006-10-03 09:19:15 · 1 answers · asked by hetrp 1 in Chemistry

Hi guys, I beg u to help me with this:

Currently I have 2 models
y1 = a1*x1 + b1*z1 + c1
y2 = a2*x2 + b2*z2 + c2

y1 is taken from 18 data samples.
y2 is taken from 72 data samples.

I want to perform null hypthesis as a1 = a2, b1=b2, c1=c2.
My goal is to show that first model is different than second model.

Do u know some links or books that can be useful to me?
or maybe u can help me to figure out what I should do.....
Thanks so much.... I'm so desperate with this...

2006-10-03 09:18:38 · 2 answers · asked by Anonymous in Mathematics

2006-10-03 09:15:33 · 5 answers · asked by Jia 1 in Mathematics

Heres another one. I know how to derive when y=f(x) but im struggling with this one. thanks.

2006-10-03 09:13:44 · 3 answers · asked by jason6x6x6 3 in Mathematics

2006-10-03 09:13:00 · 29 answers · asked by carl j 1 in Engineering

I need to know what DNA stands for so when I come it again I would know that answer on top of my head. (or school)

2006-10-03 09:10:17 · 14 answers · asked by Anonymous in Other - Science

11.15 grams of pure iron are allowed to react with oxygen to form an oxide, FexOy. If the product weighs 14.3g, what would be the simplest formula of the compound?

2006-10-03 09:09:33 · 1 answers · asked by hetrp 1 in Chemistry

2006-10-03 09:08:20 · 15 answers · asked by Kt C 2 in Zoology

And, how long will it be before home computers could store the entire library of congress on it's storage drive(s)? (or can they already)

2006-10-03 09:07:31 · 2 answers · asked by martin h 6 in Other - Science

Im soo close to figuring it out, i got my notepad filled with math but im still not getting it. If you don't know then give me some useful links which can help me. THANKS!

2006-10-03 09:07:05 · 2 answers · asked by jason6x6x6 3 in Mathematics

I have 4 groups of numbers for a quality score - calculating the mean score is easy enough but I need 95% confidence intervals, I know there is a NORMINV function that can be used for this purpose ... how do I use this function to calculate what I need ? Is there any other way of doing it ?

2006-10-03 09:06:49 · 2 answers · asked by shehan s 1 in Biology

2006-10-03 09:03:42 · 6 answers · asked by red_red_downcast 1 in Chemistry

2006-10-03 09:02:25 · 2 answers · asked by red_red_downcast 1 in Chemistry

..compared to other materials such as titanium, diamond, quartz, etc? Does it have a high melting point?

2006-10-03 09:02:16 · 6 answers · asked by bit_slicer 2 in Chemistry

2006-10-03 09:00:56 · 11 answers · asked by littyfamily 1 in Mathematics

2006-10-03 09:00:42 · 2 answers · asked by red_red_downcast 1 in Chemistry

2006-10-03 09:00:06 · 9 answers · asked by Dan 4 in Mathematics

I have an equation: x/a + y/b = 1. I got the (wrong) answer of x/a + y = b. What did I do wrong and what do I have to do to get the right answer?

2006-10-03 08:59:42 · 3 answers · asked by vinskid2005 2 in Mathematics

2006-10-03 08:58:42 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2006-10-03 08:57:57 · 7 answers · asked by red_red_downcast 1 in Chemistry

2006-10-03 08:57:18 · 3 answers · asked by Anonymous in Biology

I dont no if u could see air outer space or not cuz i never been...

2006-10-03 08:57:12 · 7 answers · asked by Maya W 1 in Other - Science

2006-10-03 08:56:53 · 12 answers · asked by red_red_downcast 1 in Chemistry

Apollo 1 was named for the astronauts that died during a pre-flight test, but then the missions jump to Apollo 4 after that. What happened inbetween? Were there any missions?

2006-10-03 08:54:00 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2006-10-03 08:52:57 · 3 answers · asked by star 2 in Biology

Find Maclaurin Series of function f(x) = (1-cosx)/x^2 . And with using this serie find the x=1.2 value of the function with 5 term far from serie and 4 term far from comma ( I mean 0.1254 like this).

2006-10-03 08:52:13 · 3 answers · asked by nikeless2008 1 in Mathematics

i need three reasons why we shouldnt waste water

2006-10-03 08:50:27 · 23 answers · asked by Anonymous in Earth Sciences & Geology

if i have the equation -x^2-12x-4

then when it is in completed sq format is it...

-(x+6)^2...
or
-(x-6)^2....

???

2006-10-03 08:48:31 · 5 answers · asked by 0425x 2 in Mathematics

2006-10-03 08:44:54 · 1 answers · asked by Anonymous in Other - Science