Science & Mathematics - 22 October 2007

y=3 cos x/5

2007-10-22 08:30:19 · 3 answers · asked by PiNk-PrInCeSs 3 in Mathematics

Predict the chemical formulas of the compound formed by the following pairs of ions:

1) Cu+ and S 2- = Cu2S
2) Fe 3+ and O 2- = Fe2O3
3) Hg2 2+ and CO3 2- = Hg2CO3
4) Ca 2+ and AsO4 3- = Ca2O4 + As3
5) NH4 + and CO3 2- = (NH4)2CO3

2007-10-22 08:26:50 · 5 answers · asked by Whitney D 1 in Chemistry

2007-10-22 08:26:14 · 3 answers · asked by ace 1 in Physics

Even down to a tiny protist swimming in pond water, we are all in water somewhat. There is water vapor in the air. However, I would like a more elaborate answer for this question. "all life is aquatic" is a genaric phrase, and I cant decipher it.

2007-10-22 08:25:24 · 4 answers · asked by A nony mouse 2 in Biology

f(x) = 6x4 + 2x3 -3x2 +2

Can someone please explain how to solve this one?

2007-10-22 08:23:20 · 4 answers · asked by Hamid K 1 in Mathematics

http://answers.yahoo.com/question/index?qid=20071022120754AADIWo4&r=w

The question I asked.

Now I have questions for the people that answered...

Do you know how to read?
Comprehend words?

Half evolved fossil! I know were fossils are. I have been to research facilities and seen them. As I am sure many people have.

I said HALF EVOLVED FOSSILS! Do you need me to type that again?
Have you ever seen a fossil of a fish...becoming a bird?
With distorted bones and unspeakable changes to show it was actually changing from one animal to another?

THAT is what I was asking.

I have read Darwins theory and I am just wondering why people are treating some old mans thoughts and opinions like a fact.

I do not treat the bible as fact, so dont try and throw that at me.

2007-10-22 08:20:43 · 14 answers · asked by Megan 3 in Biology

Show the work please

2007-10-22 08:20:29 · 27 answers · asked by Anonymous in Mathematics

A girl has four math books, three novels and two books of poetry. She wants to arrange them on her shelf so that all the math books are to the left, all the novels are in the middle, and all the poetry books are to the right. How many different arrangements of books are possible?

2007-10-22 08:18:26 · 13 answers · asked by Jerry S 1 in Mathematics

an experienced bank auditor can check a bank's deposits twice as fast as a new auditor. Working together it takes the auditors 18 hrs. to do the job. How long would it take the experienced auditor working alone?

2007-10-22 08:18:07 · 4 answers · asked by amy f 1 in Mathematics

explain them to me.

especially finding # of strands, input force, and max wieght lifted.

2007-10-22 08:15:06 · 1 answers · asked by ♥xoxo 3 in Engineering

I have an idea for it already, making a scavanger hunt with normal household items using chemical symbols (ex. "Find something that contains NaCl) but I don't know how to go about doing that.

I can't find anywhere on the internet anything about it, like different compounds or elements that the products contain, any help here?

2007-10-22 08:13:00 · 3 answers · asked by Anonymous in Chemistry

. If there are 230 girls at the dance, how many boys are in attendance?

2007-10-22 08:10:42 · 11 answers · asked by LOU C 1 in Mathematics

2007-10-22 08:10:25 · 5 answers · asked by Anonymous in Engineering

For what numbers a and b is the system of equations below satisfied by x = b and y = a?

x−y=a
7x+5y=76

2007-10-22 08:05:37 · 5 answers · asked by Byron 1 in Mathematics

Ok so the equation is X to the 4 + 3X to the 3 - 3X to the second + 3X - 4. The roots we have are 1 and -4, I need all the roots. How do I do this?

2007-10-22 08:05:37 · 3 answers · asked by Emily H 2 in Mathematics

2007-10-22 08:04:39 · 5 answers · asked by Anonymous in Engineering

which is heavier? a ton of led, or a ton of feathers?

2007-10-22 08:04:22 · 14 answers · asked by alex m 1 in Other - Science

If you dont know the relative densities????

2007-10-22 08:03:23 · 3 answers · asked by senthiana 1 in Chemistry

can be connected to form a rectangle with sides parallel to the sides of the grid?

My answer is 18 yet the correct answer is higher.

Any assistance would be greatly appreciated.

2007-10-22 08:00:40 · 2 answers · asked by Anonymous in Mathematics

on an automobile, how could you increase the distance traveled for each revolution of the axel while keeping bearing friction constant?

2007-10-22 07:59:27 · 2 answers · asked by ♥xoxo 3 in Engineering

2007-10-22 07:55:29 · 1 answers · asked by loblawbob44 1 in Biology

2007-10-22 07:53:00 · 2 answers · asked by caramel_chik_09 1 in Engineering

2007-10-22 07:52:25 · 2 answers · asked by caramel_chik_09 1 in Earth Sciences & Geology

It has been many years since a muslim scientist has come up with any major scientific breakthrough. A muslim Iranian physicist, Reza Mansouri, suggests that this is because of the cultural influences of islamic communities, such as the same word for religious scholar (in arabic) is used for the scientific scholar. Also, he suggests that because Islam is so influential, many muslims only study the sciences to help understand God and to understand religious concepts. He also points out that there are no universities from muslim countries in the top 200 in the world.

What are your views on this? Is there any other reason for the lack of muslim contribution to science in the past 6 centuries?

All imput would be welcome, but please note i will report anything that is racist.

2007-10-22 07:52:01 · 4 answers · asked by Anonymous in Other - Science

A uniform disk with a mass of 35.5 kg and a radius of 0.424 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing indicates.
(a) What is the net torque produced by the two forces?
(b) What is the angular acceleration of the disk?

2007-10-22 07:46:17 · 3 answers · asked by Anonymous in Physics

I'm having trouble with the following proof:

If the domain of a continuous function is an interval, show that the image is an interval. Give examples where the image is an open interval.

Anyone able to show me that way? Thanks

2007-10-22 07:42:25 · 1 answers · asked by mathishard31415 1 in Mathematics

What is the lattice structure of water and what it looks like?

What are the interactions that hold the structure in place?

2007-10-22 07:40:35 · 2 answers · asked by STAT1 3 in Chemistry

2007-10-22 07:37:42 · 2 answers · asked by julie 1 in Earth Sciences & Geology

Gayle runs at a speed of 4.00 m/s and dives on a sled, initially at rest on top of a frictionless snow-covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 15.0 m? Gayle's mass is 50.0 kg, the sled has a mass of 5.00 kg, and her brother's mass is 30.0 kg.

2007-10-22 07:36:35 · 2 answers · asked by Captain Whiskerboy Litterbox 3 in Physics

I need to find the trapezium with the maximum area which is in a semicircle, using differentiation. The big base of the trapezium is the diameter of the semicircle (2R) and the other two vertices on the semicircle.
What I have to do, is to express the area A=[(b1+b2)h]/2 in R, then find the first derivative and then the stationary points.
Any idea how to express all the variables of the formula in R?

2007-10-22 07:33:22 · 3 answers · asked by andymathematics 1 in Mathematics