Science & Mathematics - 4 July 2007

As what I learn, used electricity is disposed away through neutral wire, but where the neutral wire go? Is it goes into earth? Then its function should be same with the earth wire, isn't it?

2007-07-04 03:55:56 · 5 answers · asked by Lai Yu Zeng 4 in Physics

2007-07-04 03:53:47 · 7 answers · asked by Anonymous in Agriculture

I used to think it is slowing down, but I found out it isn't! How could it be accelerating if gravity is there to pull it together?

2007-07-04 03:52:41 · 4 answers · asked by worried person 1 in Physics

2007-07-04 03:51:39 · 27 answers · asked by Ste B 5 in Astronomy & Space

2007-07-04 03:43:58 · 3 answers · asked by mitch 1 in Engineering

Help! gurus of chemistry.. question: A 64.213g sample of an unknown compound contained the elements carbon, hydrogen and nitrogen in unknown ratios. It was determined that the combustion of this compound provided 128.2319g of CO2 and 78.73713g H2O. A separate mass spectrometry experiment confirmed the molecular weight of this compound was 88.1528 amu. Use this infomation to determine the molecular formula of this compound.

I would like to know how to do it!

2007-07-04 03:42:36 · 5 answers · asked by Vpow 1 in Chemistry

2007-07-04 03:37:33 · 5 answers · asked by Anonymous in Mathematics

2007-07-04 03:35:51 · 3 answers · asked by drop of dew 1 in Botany

If we have log of b to the base a, do 'a' and 'b' always have to take positive values? Why is it so?

2007-07-04 03:35:06 · 7 answers · asked by Anonymous in Mathematics

In reference to digital osscilliscopes and the sampling rate what does the term kSa/s stand for? I know it is something like kilo samples (???) per second. what is the a for?

2007-07-04 03:35:00 · 3 answers · asked by Anonymous in Engineering

2007-07-04 03:34:57 · 6 answers · asked by Anonymous in Chemistry

2007-07-04 03:33:19 · 1 answers · asked by Anonymous in Chemistry

2007-07-04 03:31:07 · 1 answers · asked by welma 2 in Physics

I tried to dissolve Sodium Alginate (SA) with Trisodium Phosphate (TSP). At first, it was successfully dissolved resulting clear, bright pink, thick liquid gel. Then I tried another experiment with TSP & SA from different source. They are more coarse & grainy than the first one. They results yellowish & unclear color. I don't know what caused this. Is it the TSP or SA? I also don't know whether they have same quality with the first ones. I suspected the purity level of both substances. Is there any methods to determine the purity? and the method to purify them?

2007-07-04 03:30:37 · 1 answers · asked by ? 2 in Chemistry

2007-07-04 03:25:30 · 8 answers · asked by brylechua 1 in Geography

2007-07-04 03:19:40 · 4 answers · asked by zebbie g 2 in Zoology

Does anyone know which edition of the student solution manual lines up with the 7th edition textbook? Thanks !

2007-07-04 03:19:37 · 1 answers · asked by ktm 3 in Mathematics

What does anybody know about the post operative recovery process? SHould I expect to retuen to a "normal"life?

2007-07-04 03:18:57 · 3 answers · asked by Yolee 1 in Medicine

2007-07-04 03:08:07 · 2 answers · asked by rasclattini 2 in Geography

[4^(m+1/4) * {2^(m+1)}1/2 over 2 * 2^(-m/2)] 1/m = 8

2007-07-04 03:06:39 · 3 answers · asked by Anonymous in Mathematics

2007-07-04 03:03:12 · 16 answers · asked by brylechua 1 in Astronomy & Space

2007-07-04 03:02:50 · 3 answers · asked by harmony 1 in Mathematics

2007-07-04 03:01:21 · 8 answers · asked by Marigold 1 in Mathematics

2007-07-04 03:00:51 · 2 answers · asked by vicki k 1 in Mathematics

Why is it not possible for crystalization to give 100% yield?

2007-07-04 02:58:32 · 4 answers · asked by Rhea 1 in Chemistry

A rectanular plot has been fenced with 500ft of wire. find the length and width of th plot if the length is 4 more than twice the width. Be sure to show both length and width along with units in your answer.

2007-07-04 02:51:41 · 9 answers · asked by newnew 1 in Mathematics

integrate: 2/squareroot (1-25x^2)

there are two methods i know:

Using the long method, my answer is 2/5sin^-1 5x + C

Using the short alternative method, my answer is 2sin^-1 5x + C

Which answer is correct? Please justify ur explanation & can you derive a conclusion or something. thx

2007-07-04 02:50:02 · 2 answers · asked by Kendra 3 in Mathematics

My sorority sister told me that there is a good job available at her workplace. The glitch is that I don’t have a car and there is no public transportation to get there. So, I need to find out how far it is and see if it is possible to walk there. Rarely, I’ll be able to get a ride with my friend, but it will be hard as we might have different schedule.

She isn’t sure how fast she drives, so I just ask about her driving style. She has a 1992 Toyota Celica with a 2.2-liter, 135 hp, I4 engine and a 5-speed manual transmission. She mentioned that she usually keeps it in 4th gear and if she needs to pass another car, she would change to 3rd gear. The route is mostly a straightaway, on a side road and she would drive at a constant speed for 30 minutes.

1.Roughly, how far is it?

2.Is walking realistic?

3.Roughly, how fast does she drives?

2007-07-04 02:49:00 · 5 answers · asked by Kate 陳玉萍 2 in Mathematics

2007-07-04 02:34:02 · 10 answers · asked by eddy S 1 in Astronomy & Space

2007-07-04 02:31:43 · 22 answers · asked by Aamir 2 in Astronomy & Space