Science & Mathematics - 17 January 2007

2007-01-17 05:10:59 · 7 answers · asked by Anonymous in Physics

my teacher doesn't simply want the distance formula. He wants to prove the formula using a proof.

2007-01-17 05:10:54 · 4 answers · asked by Megan J 2 in Mathematics

i have noticed in the lab, that a small amount of blue CuSO4 crystals (like 0.5g or even smaller than that) when dissolved in water makes it a greyish-white opaque colour. when u go on adding more and more copper sulphate crystals and dissolving them in the water, the solution becomes more and more aqua blue and transparent in colour.
why does this happen? does it have anything to do with the way the CuSO4 crystal is structured?
i am using this in a physics experiment. i want to know if a solution of very low concentration CuSO4 (that is more opaque in colour) will allow more light to pass through it than a solution with a higher concentration of CuSO4 (that is clear blue in colour) or not?

2007-01-17 05:09:46 · 2 answers · asked by amandac 3 in Chemistry

2007-01-17 05:09:11 · 7 answers · asked by NICOLA P 1 in Zoology

I admit that I read Dan Brown's book Deception point that brought this up in my mind. I personally don't believe we'll colonize the moon and Mars. I don't know what benefit there is to knowing that there are planets out there that we can take pictures of. I don't know much about NASA, so can someone tell me why we spend billions of dollars on the space program?? Has it given us anything? Satelites are the only thing I can think of that touches my daily life.

2007-01-17 05:08:56 · 12 answers · asked by BaseballGrrl 6 in Astronomy & Space

conceptual problem: if you can find gravitational force of an object like the moon using GM1M2/r^2 equation, how do u find velocity of the object (moon)? can u just plug in Fg for Fc and then rest of ur variables and go from there?

2007-01-17 05:07:09 · 2 answers · asked by Anonymous in Physics

could you also explain it i dont have a clue about how you get lime, wot the chemical symbol is or anything. Thank You

2007-01-17 05:07:05 · 1 answers · asked by stace9012003 2 in Chemistry

A.1.414 B. 1.414> the quare root of 2
C. 1.414=the square root of 2
D. 1.414=/the suare root of 2

2007-01-17 05:06:33 · 9 answers · asked by Anonymous in Mathematics

Can anyone tell me an answer 2 this question.It goes like this:
When whe draw a chord on a circle with 2 points 2 regions are formed. Next we add a point and join this point to the other 2 points in a straight line. Then there are 4 regions formed. Next there are 4 points then 8 regions are formed. When 5 points are there 16 regions are formed. When 6 points are added we presume that 32 regions will be formed, but its 31. My question is how to find the number of regions formed when 'n' number of points are given??

2007-01-17 05:05:59 · 2 answers · asked by Anas 1 in Mathematics

moses will rise on the 11th

2007-01-17 05:05:51 · 2 answers · asked by Anonymous in Astronomy & Space

Find the derivative of F(x) = 4/(x^2 + 2x + 1)

Explain so I can see what I did wrong. Thanks.

2007-01-17 05:05:14 · 7 answers · asked by ??? 2 in Mathematics

Because it is a safe chemical that reduces amounts of acid and works as a fertiliser? Also, why do farmers have to be careful not to use too much? And if you know, what is slaked lime more commonly know as? Thank you!

2007-01-17 05:04:14 · 4 answers · asked by Anonymous in Botany

2007-01-17 05:03:46 · 3 answers · asked by manuelkuhs 1 in Chemistry

2007-01-17 05:03:43 · 3 answers · asked by jordan k 1 in Chemistry

the problem is 5.25g/cm cubed and convert that to lbs./ft cubed.. can you solve it and help me how to do it? thanks

2007-01-17 05:03:42 · 2 answers · asked by Anonymous in Chemistry

2007-01-17 05:02:26 · 3 answers · asked by Anita B 1 in Mathematics

2007-01-17 05:02:16 · 4 answers · asked by faro the architect 2 in Earth Sciences & Geology

For example:
"The enthalphy of reaction (H0rxn) for the conversion of cyclohexene to cyclohexane by hydrogenation is –28.6 kcal/mol and is –49.8 kcal/mol for the conversion of benzene to cyclohexane. Use these data to estimate the stabilization energy of benzene. "

2007-01-17 05:01:56 · 1 answers · asked by manuelkuhs 1 in Chemistry

The episodic struggle between France and Englad that lasted from 1337 ti 1453 is called the Hundred Years__________
One hundred years ago (in 1906), the _________ brothers recieved a patent for what they called the "new and useful improvements in the flying machine."
One hundred years ago, the "Apparatus for Treating Air" (U.S. Pat #808897) was granted to Willis Haviland Carrier, the "father of ________________."
One hundred years ago, the first ______was invented by Lee De Forest.
One hundred years ago,_______ _______ introduced his Model T Ford
One hundred years ago, ________, a chewing substance, which with you can blow bubbles was invented by Frank Henry Fleer.
One hundred years ago, WIlliam Kieth Kellogg introduced a tasty cereal, know as _________ ________, which revolutionized the breakfast habits of the Western World.

2007-01-17 05:01:51 · 8 answers · asked by TrueHappiness<3 3 in Mathematics

A direct answer OR where can i get it on the internet(website)?
An alternative answer can be a list of the advantages of mathematical modelling.

2007-01-17 05:01:41 · 4 answers · asked by good day 2 in Mathematics

Ralph is 3 times as old as Sara. In 6 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.
Ralph's age now would be represented as:

2007-01-17 05:01:15 · 2 answers · asked by texas_diamond_diva 1 in Mathematics

Peggy had three times as many quarters as nickels. She had $1.60 in all. How many nickels and how many quarters did she have?
The equation for the problem is:

2007-01-17 05:00:52 · 5 answers · asked by texas_diamond_diva 1 in Mathematics

each of the following except
-4
-2
0
-5

2007-01-17 04:59:56 · 5 answers · asked by Anonymous in Mathematics

2007-01-17 04:58:59 · 15 answers · asked by ? 4 in Mathematics

I've seen that the suggested dosage of proteins when bodybuilding is about 2 grams per kilogram of body weight a day. I have calculated this with different foods and it just doesn't seem healthy to me to eat that much proteins. Am I right?

2007-01-17 04:57:31 · 2 answers · asked by Dr. Zaius 4 in Medicine

Find the derivative of : 4^(1+3t)

If it does explain. Thanks!

2007-01-17 04:57:28 · 3 answers · asked by ??? 2 in Mathematics

square root of 3x divided by the square root of x minus the square root of 3

2007-01-17 04:56:00 · 3 answers · asked by Anonymous in Mathematics

What is the largest division of geologic time?

2007-01-17 04:55:22 · 1 answers · asked by Rattiesrule 2 in Biology

1 - Chemical reaction rates vary with the conditions of the change, but nuclear rates do not.

2 - Nuclear decay rates vary with the conditions of the change, but chemical reaction rates do not.

3 - Both chemical reaction rates and nuclear decay rates vary with the conditions of the change.

4 - Neither chemical reaction rates nor nuclear decay rates vary with the conditions of the change.

I want to say 4, but I am not sure.

2007-01-17 04:53:44 · 5 answers · asked by Julia 2 in Chemistry

ELEMENT is the simplest form of matter and there are about 109 elements but only 92 of them occur naturally on earth;my question is then how are the other elements formed when an element is not made up of anything.

2007-01-17 04:53:41 · 6 answers · asked by SIm 1 in Chemistry