Science & Mathematics - 30 October 2006

If I'm not mistaken, the derivative of f(x)=sin(x)cos(x) is -sin^2(x)+cos^2(x) using the formula f'(x)g(x)+f(x)g'(x). In my book the answer to the second and third derivatives are -4sin(x)cos(x), 4sin^2(x)-4cos^2(x) respectably. How do they get that from the first derivative?

2006-10-30 02:35:47 · 8 answers · asked by big_j_gizzy 4 in Mathematics

if y=7x

2006-10-30 02:33:46 · 14 answers · asked by Amanda Fay! 3 in Mathematics

Chem homework due tomorrow:
Under what conditions would you predict that real gases least approximate ideal gas behavior? Explain why real gases behave least like ideal at the conditions stated.

2006-10-30 02:29:50 · 3 answers · asked by natrgrrl 2 in Chemistry

2006-10-30 02:18:19 · 9 answers · asked by kaleemdin34567 1 in Zoology

in the xy plane about the z axis passing through its center, perpendicular to its length. The mass of each oxygen atom is 2.66 x 10^-26 kg, and at room temperature, the average separation distance between the two oxygen atoms is
2.02 x 10^-10 m (atoms treated as point masses). if the angular speed of the molecule about the z axis is 5.61 x10^12 rad/s, what is the rotational kinetic energy (answer in J)?


This is wrong, & I can't figure why???????
KE=(1/2)*I*omega^2
I=m*r^2 for each atom, r being half the distance that seperates them, so in total 2*m*r^2
omega= 5.61 x 10^12 rad/s

2006-10-30 02:17:21 · 1 answers · asked by Dee 4 in Physics

What if I told you that you’ve already answered this question and to prove my point, you’re going to answer it in a few minutes. Can anyone explain this theory?

2006-10-30 02:16:54 · 25 answers · asked by Charlie Brigante 4 in Physics

Did anyone ever work it out?

2006-10-30 02:16:44 · 6 answers · asked by Anonymous in Mathematics

the importance in relation to folds,faults,joints and uncomformities

2006-10-30 02:16:33 · 3 answers · asked by stone 1 in Earth Sciences & Geology

2006-10-30 02:13:37 · 17 answers · asked by jessica g 1 in Zoology

2006-10-30 02:12:22 · 4 answers · asked by Meg ♥ 1 in Chemistry

I'm putting together an OLS monte carlo experiment that looks at alternative methods of modelling a certain constructed dependent variable. Is it necessary for me to artificially generate an "error term" for my constructed dependent variable?

2006-10-30 02:08:55 · 2 answers · asked by Nic 1 in Mathematics

They have shrunk and taste bitter. Why is this?

2006-10-30 02:07:24 · 3 answers · asked by !!!Free!!! 2 in Zoology

2006-10-30 02:06:05 · 5 answers · asked by aschreib2 1 in Geography

I do hear that there a bird whose eye is bigger than the brain what bird is it.

2006-10-30 02:05:59 · 19 answers · asked by albert baba i 1 in Zoology

2006-10-30 01:58:21 · 4 answers · asked by Meg ♥ 1 in Chemistry

-(3+x) <2 (3x-5)

I can graph it fine, but I'm having a real brain fart on solving this question.

2006-10-30 01:57:08 · 4 answers · asked by Nate C 1 in Mathematics

sequence, what is 101st term, 20th term, and 30th term? Please show me how to do this.

2006-10-30 01:56:39 · 9 answers · asked by Rhonda O 1 in Mathematics

2006-10-30 01:55:04 · 4 answers · asked by Meg ♥ 1 in Chemistry

2006-10-30 01:54:20 · 2 answers · asked by achtung12001 2 in Weather

2006-10-30 01:51:28 · 24 answers · asked by achtung12001 2 in Mathematics

2006-10-30 01:50:52 · 6 answers · asked by confused 3 in Astronomy & Space

2006-10-30 01:44:34 · 20 answers · asked by kaavya p 1 in Physics

Movies or shows/talk about Dinosaurs, Very often, the actual animals like lions, elephants were not there. They didn't seem to coexist in the world. Why!? I meant shouldn't those animals be seen with while they were there!? (p.s. they were there only as prey.. as seen in Jurasic park (small lamb)

2006-10-30 01:43:44 · 4 answers · asked by mystery t 4 in Zoology

A pet store owner mixes two types of bird seed that cost $1.25 per pound and $2.20 per pound to make 20 pounds of mixture that cost $1.65 per pound. How many pounds of each kind of birdseed are in the mixture?

2006-10-30 01:43:26 · 6 answers · asked by Nate C 1 in Mathematics

2006-10-30 01:43:10 · 2 answers · asked by Shadow 2 in Engineering

Could I use an endothermic reaction to accurately measure the heat capacity of a calorimeter?

2006-10-30 01:43:05 · 2 answers · asked by Anonymous in Chemistry

im realy trying to study physics here but getting easily distracted help!!!!!!!!!!

2006-10-30 01:37:28 · 7 answers · asked by HARPREET K 1 in Physics

how long does it usually take for the generic vicoden to exit ur system and how long befor i can pass a piss test??

2006-10-30 01:36:05 · 7 answers · asked by scarface 1 in Medicine

2006-10-30 01:34:34 · 2 answers · asked by Anonymous in Mathematics

He worked on this theory most of his life it would be nice to see it finished.

It was suppose to cover every other theory hence the name Theory of Everything.

But I realize it took science a long time just to understand his other theories it could be impossible to at this point in time to even know where to start.

Has anyone even considered trying to finish it?

2006-10-30 01:32:57 · 8 answers · asked by Sean 7 in Physics