Science & Mathematics - 25 January 2007

2007-01-25 19:32:45 · 13 answers · asked by Camsmiria 1 in Earth Sciences & Geology

how to control my emotional fillings when i am push to the wall

2007-01-25 19:31:23 · 1 answers · asked by simpson kofi 1 in Engineering

A rock dropped into still water sends out concentric ripples. If the radius of the outer ripple increases at the rate of 2ft/s, how fast is the area of the disturbed surface increasing when it is 6 ft in diameter?

The answer is 12pi ft/s^2. Can anyone show me how to get this answer? Help will be appreciated.

2007-01-25 19:29:33 · 1 answers · asked by compstuft 2 in Physics

My Biology professor said that humans are speciating. Can someoneplz elaborate on this in detail for me. Thank you yahoo ans.

2007-01-25 19:27:42 · 8 answers · asked by mack_cali 2 in Biology

lets consider a 1cm^2 vacumn, its just natural that it tends to fill itself, tht is, it tries to bring the nearby materials into it...

now before bigbang, when there was nothing, only vacum, the same force would be trying to pull things in, but there wouldn't be anything around... but then the energy which pulls it in still exists...

so its proved that energy can be converted into matter, so tht energy might have created the matter for the bigbang..

THIS IS JUST A THEORY, PLZ LET ME KNOW IF U C ANY FLAW (i'm aware that the entire theory might be a flaw, bt why can't this have happened?)

2007-01-25 19:20:45 · 5 answers · asked by Lord Balmon 1 in Astronomy & Space

it's question a that's very very imp as i have a exam tommorow!! plz answer soon!!

2007-01-25 19:17:53 · 5 answers · asked by Zenews Labrint 3 in Physics

2007-01-25 19:10:28 · 9 answers · asked by wen 1 in Mathematics

If the graph of a single variable equation is put on a number line, and the graph of a linear equation in two variables is put on a Rectangular coordinate system with 2 axes, how would we graph a 3 variable linear equation?

2007-01-25 19:10:10 · 4 answers · asked by Christ' Soldier 2 in Mathematics

A friend has a brilliant idea that would require computer programming and/or engineering to produce (something neither of us has a clue about). It is not a game but a serious business tool that he has found a need for and roughly designed. Can this idea be sold directly to a company or does somebody have to do a working prototype before marketing it?

2007-01-25 19:01:18 · 5 answers · asked by marcoporres 4 in Engineering

Find the coordinates of the points of intersection of y=x/2 with
a) x(square) - y(square) =1
b) x(square)/4 + y(square) =1

2007-01-25 19:01:07 · 3 answers · asked by PonkieD 1 in Mathematics

2007-01-25 18:59:59 · 7 answers · asked by ~*Muffin*~ . 1 in Mathematics

2007-01-25 18:51:45 · 4 answers · asked by ? 2 in Mathematics

2007-01-25 18:51:20 · 6 answers · asked by Zenews Labrint 3 in Physics

Even though I like all the Star Trek movies, I think "First Contact" is the best, because it has a fantastic storyline, great sets and first class acting. I was just wondering if anyone else agrees with my views !

2007-01-25 18:49:51 · 9 answers · asked by Anonymous in Astronomy & Space

Can someone answer this question for me and please explain your reasoning for the answer. Amywho is 5ft tall casts a a4ft shadow when the pine tree has an 8ft shadow.How tall is the pine tree?

2007-01-25 18:46:17 · 13 answers · asked by llittle pee wee 1 in Botany

im supposed to use substitution to solve this problem! please help, I already try but seeems like im doing something wrong!

2007-01-25 18:44:18 · 3 answers · asked by SPHINX 1 in Mathematics

2007-01-25 18:41:40 · 8 answers · asked by Anonymous in Zoology

2007-01-25 18:41:27 · 3 answers · asked by badja 1 in Chemistry

what other ways might air be eliminated from the cup?
Is too much air ever a problem to the farmer?
Would the same results occur with different types of seeds?
Plants make their food but they do need a supply of minerals. Choose three minerals and describe what happen to plant growing without them.
Give two reasons why anomals and plants need food.

2007-01-25 18:40:40 · 3 answers · asked by jack_hock2003 1 in Botany

2007-01-25 18:38:53 · 3 answers · asked by badja 1 in Chemistry

I followed some advice which said that u should first look at the most common default number and do that one first. Then take it in turns to fill each row, column and box with each of the numbers.

The problem is that there is usually more than one space in the little nine-box box in which the number can theoretically go without a contravention of rules, so how do I know which one to put it in?

I usually just put it in any box which the rules allow but then I find towards the end of the game that the final 2 or 3 numbers cannot possibly go in the empty boxes which are left because doing so breaks the rules. As a result I have never been able to successfully complete a standard 9x9 grid.

I'm sure this is a common problem which everybody has encountered (and I am a fairly logically-minded person) but please can somebody tell me 'the trick' of how to overcome this.

I will give you 10 points and choose u as the best answer if you give me the best tip which works.

2007-01-25 18:37:45 · 8 answers · asked by Lara D 4 in Mathematics

2007-01-25 18:37:28 · 2 answers · asked by Anonymous in Chemistry

what would happen if only the topside of leaves were coated?
what would happen if only the bottom side of leaves were coated?
what would happen if only half of the leaf was coated?
what happen to the plant leaf after the mask is removed?

2007-01-25 18:29:22 · 12 answers · asked by jack_hock2003 1 in Botany

in turning cyclohexanol into cyclohexene, we use E1 reaction...wat r d possible basic groups we could use???

2007-01-25 18:27:57 · 3 answers · asked by john m 1 in Chemistry

why is it that we prefer to use phosphoric acid than sulfuric acid?

2007-01-25 18:26:09 · 3 answers · asked by john m 1 in Chemistry

A the entire body
B the heart and muscle cells
C the parts being exercised
D muscle cells

2007-01-25 18:25:14 · 3 answers · asked by kimberly n 1 in Biology

Find the minimum and maximum distance of the particle from the origin.

2007-01-25 18:25:02 · 3 answers · asked by Jeff 2 in Mathematics

r=<4,1,2> + t<-2,1,2> and r = <2,1,1> + s<2,0,1>. (A plane bisects the angle between two lines if one line is the reflection through the plane of the other line.)

2007-01-25 18:23:43 · 2 answers · asked by Jeff 2 in Mathematics

2007-01-25 18:20:39 · 8 answers · asked by jp 1 in Earth Sciences & Geology

2007-01-25 18:20:38 · 13 answers · asked by Jstevens 2 in Earth Sciences & Geology