Science & Mathematics - 13 January 2007

2007-01-13 09:14:22 · 6 answers · asked by vanessiekho 2 in Chemistry

Problem........x/x^2-xy - y/xy-x^2 This is exactly how it is written in the book.........need to find common demoninator first......help....ask the question once but got wrong answers...

2007-01-13 09:13:38 · 2 answers · asked by gail 1 in Mathematics

i saw this on some channel years ago... i cant find info on it though. I simply wanted to know if years and years from now, people will start life on other planets and what will become of the human race after the end of the planet earth. Or if everyone might stay on earth and thats all...

2007-01-13 09:11:26 · 4 answers · asked by ramintav1 1 in Astronomy & Space

I have to write my discussion & conclusion..which I have done a draf...Can u try to understand,correct and add anything that needs changing and adding..plez

-Aim: "To identify for unknown solutions"

Discussion

I obsevered in solution "A", no reaction from the test that was prescribe produce no change but a neutral pH. When solution "B" was tested on phenolphalein indicator it turned bright purple which states that this is very alkalic,it was the solely one that had that change. I had obsevered that the colours or changes that had in the various solutions were not given as the same result in each type of solutions. The solution A,B,C had no reaction change for 'reaction with sodium hydrogen carbonate.However in solution "D" in reaction with sodium hydrogen carbonate fizzed rapidly with tiny bubbles in the test tube.

2007-01-13 09:11:01 · 2 answers · asked by Anonymous in Chemistry

this is for extra credit in my Algebra II/ Trig course and i've never seen this before well i don't recall anything to this question please give me your best of knowledge on this question i would dearly appreciate it....Thank You

~JosH~

2007-01-13 09:07:14 · 15 answers · asked by blazncaczn 3 in Mathematics

2007-01-13 09:06:33 · 9 answers · asked by gaiaxy 1 in Weather

When I make noodles, I have the noodles in the water, and the heat is on enough to keep the water at a boil, and steam comes up out of the pot at a constant rate. Pretty normal. When the noodles are done and I turn the heat off, the amount of steam coming out of the pot suddenly increases. I've noticed that this behavior is independent of the presence of noodles in the water.

2007-01-13 09:02:19 · 4 answers · asked by Tony Hex 1 in Physics

I am extremely confused on what cellular respiration really is and how it works. Can someone please explain in kid-friendly terms on whats going on? How does it differ from Photosynthesis?

2007-01-13 08:58:25 · 5 answers · asked by 1234 1 in Biology

Don't solve it for me, just what is it in the formula?

2007-01-13 08:56:19 · 8 answers · asked by girl_pink 1 in Mathematics

A manufacturer sends out his candy tubes in boxes of 160. They are packed in eight rows of 20 each, and exactly fill the box. Could he, by packing differently, get more than 160 in the box? If so, what is the greatest number he could add? At first sight, it sounds absurd to expect to get more candy tubes into a box that is exactly filled, but a moment's consideration should give you the key to the paradox.

The Joke and Riddle people couldn't get it, maybe you guys can

2007-01-13 08:52:55 · 6 answers · asked by MM&FF 2 in Mathematics

How do you write a science fair proposal?

2007-01-13 08:52:39 · 2 answers · asked by Trevorman 2 in Other - Science

My frugal friends Bob and Tom love pizza; Bob the edge pieces and Tom the center pieces. Is there a formula to figure out how to cut a circular pizza so that they both get the same amount of pizza while getting their preference?

2007-01-13 08:52:31 · 4 answers · asked by Tommy W 1 in Mathematics

2007-01-13 08:50:00 · 14 answers · asked by Anonymous in Mathematics

7/9 devided by 5/6

Becomes
7/9 * 6/5

how does this become 14/15?

2007-01-13 08:49:07 · 5 answers · asked by grem 3 in Mathematics

Do you think humans might evolve wheels?

2007-01-13 08:46:22 · 10 answers · asked by Anonymous in Zoology

help with this geomitry problem
(sorry if this is not in a questionable form yet i dont know how to)


three vertices of a parralelogram are shown on the coordinate grid. what ae the coordinates of point Z that from parrallelogram wxyz?

w=(-5,0)
x=(-2,-4)
y= (3,-5)
Z= (?,?)

2007-01-13 08:45:07 · 2 answers · asked by Wesley!!! 3 in Mathematics

i have an entrance test coming up and i just need to know the ff:
1. sine/cosine/tangent: how to determine which one is opposite and adjacent
2. when exactly do you apply sine rule and cosine rule?
3. is there a way of solving a sine/cosine/tangent of a number without using a calculator (algebraically)? how?
4. Statistics and probability: What are complementary events and mutually exclusive events?
5. Logarithms: can you find a log of a number without using a calculator (algebraically)?

Please... I hope you can answer in the next 30 mins. I am not allowed to use graphing calculator in the test that's why i'm panicking. Thanks to those who answer.

2007-01-13 08:43:52 · 11 answers · asked by dendroidsoldier15 2 in Mathematics

2007-01-13 08:41:43 · 11 answers · asked by Anonymous in Zoology

2007-01-13 08:40:51 · 21 answers · asked by pammy 1 in Zoology

2007-01-13 08:39:00 · 13 answers · asked by cuteness757 1 in Biology

2007-01-13 08:35:20 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2007-01-13 08:34:34 · 4 answers · asked by Anonymous in Other - Science

cosx/1-sinx + 1-sinx/cosx



and cos(x+y) + cos(x-y) = 2cosxcosy. for that one i ended up with 2cosx and i lost the Y, how do i figure that one out.

2007-01-13 08:32:51 · 6 answers · asked by xoxo T 1 in Mathematics

i put an outdor snail into a small dish of water. what will happen next?

2007-01-13 08:32:04 · 8 answers · asked by Anonymous in Zoology

“Well usually they have a number I.D, so I can buy it online.”
The quote came from my mother when looking at my calendar wondering where the number I.D sticker was. The I.D number shows what the specific item was. But usually you can’t just enter the number in on the internet and buy what the I.D number specifies. I usually thought that I.D numbers on items in a store are used only in the stores database, but I could be stating another fallacy.

2007-01-13 08:28:33 · 1 answers · asked by pointemotion35 1 in Other - Science

2007-01-13 08:28:19 · 4 answers · asked by alexander b 1 in Physics

Give me an example.

2007-01-13 08:27:43 · 3 answers · asked by Anonymous in Mathematics

I noticed that in a school science experiment the water boiled at 90°, what causes this?

2007-01-13 08:26:59 · 7 answers · asked by chaze 2 in Chemistry

2007-01-13 08:25:55 · 4 answers · asked by aaron b 1 in Earth Sciences & Geology

befor we get started i am sorry for my bad spelling and gramer. many people beleave that life on earth came from meteors from millions of light years away hiting erath and bring the one cell organsium "Building block of life" and then over a great amount of time evolving in to what it is now ok i can buy this and even under stand it...but where the hell did that first one celled organisum come from they dont just appear so how did it all start? some were some how their was something else somthing that not even they wildist young mind can even think of. ok i lost focus on what i was doing so any way were do u think that first one came form? what kinda wild and crazy theories do you have to throw at me?

2007-01-13 08:24:59 · 9 answers · asked by Anonymous in Astronomy & Space