Science & Mathematics - 14 September 2007

Find all roots of the polynomial P(x) = x^ 4 + 9.

a. (±√ 3 ± i √3)/2

b. (−√ 6 ± i √6)/2

c. ± √3i and ±√ 3

d. (± √6 ± i √6)/2

e. (± √3 ± i √6)/2

2007-09-14 04:54:30 · 2 answers · asked by Anonymous in Mathematics

Here goes the question again. , For the sake of illustrating the impact we are having on the planet, What I would like to know is, based on the number of ALL vehicles worldwide that burn petroleum based fuel, including cars, ships, equipment, planes, etc PLUS smokestacks from factories, power plants, etc, what would be the cumulative size of all of these exhaust pipes, represented as one huge pipe. Also we could, with some more difficulty figure out an average of how many of these engines are running at any given time and just calculate the diameter of that imaginary exhaust pipe, spewing out pollutants. The physics handbook http://hypertextbook.com/facts/2001/MarinaStasenko.shtml lists one figure of 600 million cars worldwide. At an estimated average exhaust diameter of 1.5 inches, times that figure, the imaginary tailpipe of just vehicles alone would be 14,000 miles across? (I must be figuring this wrong!!!) Please help! Thanks

2007-09-14 04:51:22 · 2 answers · asked by doodlebugs 2 in Engineering

She is five years old. The medicines are paracetamol, carbocisteine and cefalexin. Her temperature has been fluctuating between 37 and 38.5 degrees C for 3 days now.

2007-09-14 04:47:01 · 11 answers · asked by Anonymous in Medicine

Western Medicine, Is it an Advanced medicine or money making opportunity ?

2007-09-14 04:44:23 · 4 answers · asked by Anonymous in Medicine

Which one of these two guys works better as a chelating agent in Food Industry or in Textile Industry? Why?

2007-09-14 04:41:31 · 2 answers · asked by Anonymous in Chemistry

including all types of roaches whats there population a couple billion, trillion, octillion, decillion

2007-09-14 04:39:26 · 12 answers · asked by Andreu 2 in Zoology

just to chew it again?

2007-09-14 04:39:16 · 9 answers · asked by velvetvoice04 2 in Zoology

(continuation)
How old was each when they got married?

2007-09-14 04:33:34 · 7 answers · asked by nutellafella 1 in Mathematics

What will happen when all the oil runs out and we cant use our cars and heat or houses? Are we going to change our way of living before all the oil has gone? Or are we going to suffer after we realise theres nothing left?

2007-09-14 04:33:25 · 22 answers · asked by Chmelski 2 in Earth Sciences & Geology

First I will let you know I am a Chem major and I hate Zoo. ( dont hate me please). I say that to inspire sypathy. My Zoo teacher has students grouped in threes and asked us to desing a groupd reseach progect.
The research progect hast be the follow
1 Unique or statement of why you are repeating a experiment ( expecting differnt results)
2 minmum 20 hours feild, actaully doing the experiment
3 research paper and presentation.

I am having a hard time formulating research idea. Partly because I am not very interested. I tried to use some chemistry but the experiments become to complicated.
All ideas would greatly be appreciated.
I like fish, anphibains, reptiles and I live in northern Cali ( Sacramento)

2007-09-14 04:29:36 · 5 answers · asked by Anonymous in Zoology

we need to know ASAP because this is due..pretty soon. thanks. :)

2007-09-14 04:27:20 · 4 answers · asked by HaleyB 2 in Weather

The length of a rectangle is ten inches longer then twice the width. If the perimeter of the rectangle is 344 inches, how do I find the dimensions?

2007-09-14 04:26:36 · 9 answers · asked by k_artiaco 1 in Mathematics

Im doing an assignment for college on Robert Boyle.. I just cant find a simple explination or definition for his law in terms that I can actually understand..

Boyles law:

"Volume and pressure of an ideal gas held at a constant temperature"

This simply means nothing to me..

Can anyone simplify it into easier words?

Thanks

2007-09-14 04:26:28 · 5 answers · asked by Anonymous in Engineering

2007-09-14 04:26:08 · 5 answers · asked by Andreu 2 in Zoology

do u think people will misuse it?

2007-09-14 04:25:00 · 10 answers · asked by Anonymous in Astronomy & Space

Is there some sort of third or fourth dimension?

2007-09-14 04:23:20 · 8 answers · asked by I.C.P. 2 in Astronomy & Space

Into two brackets

2007-09-14 04:14:20 · 10 answers · asked by Anonymous in Mathematics

Can we have another worlds from phyisics sience view ?
please explain...

2007-09-14 04:08:35 · 5 answers · asked by Anonymous in Physics

I've been looking for a picture with a simple label about where we are within it, is it known? I'd like to think we'd know about where we are within it

2007-09-14 04:02:54 · 7 answers · asked by doubat903 3 in Astronomy & Space

2007-09-14 04:00:10 · 2 answers · asked by pine 1 in Earth Sciences & Geology

(i) A coffee-maker is regulated so that it takes an average of 5.8 min to brew a cup of coffee with a standard deviation of 0.6 min. According to Chebyshev's theorem, what percentage of the times that this coffee-maker is used will the brewing time take anywhere from 4.6 min to 7 min.
(ii) Give your reason why the Chebyshev's theorem is applied in part (i).
(iii) Do you think that the percentage found in part (i) is accurate? Please explain.

2007-09-14 03:49:05 · 2 answers · asked by sky_blue 1 in Mathematics

1.)East Timor
2.)Montenegro
3.)Namibia
4.)Zimbabwe

2007-09-14 03:48:55 · 3 answers · asked by Say-What!? 2 in Geography

As a result of some malfunction, the pressure in the tank rises to 2 MPa at which point the tank explodes. Taking the atmospheric pressure to be 100 kPa and assuming the liquid in the tank to be saturated at the time of the explosion, determine the total explosive energy of the tank in terms of TNT equivalence. (The explosive energy of TNT is about 3250kJ/kg, and 5kg of TNT can cause total destruction of unreinforced structures within about a 7-m radius

2007-09-14 03:48:39 · 2 answers · asked by Anonymous in Engineering

2007-09-14 03:48:16 · 3 answers · asked by orangeishblueboy 2 in Zoology

point?

2007-09-14 03:47:12 · 4 answers · asked by Pascal 4 in Physics

We step up electricity to reduce heat loss while transmitting over long distances. The heat loss is given by I^2Rt. While stepping up the current is decreased and thus heat loss is reduced. All Right.
But what if we use Ohm's law V = IR here? Now I^2Rt becomes V^2t/R. Then when we step up the voltage the Heat Loss is increased considerably. Can someone please explain this?

2007-09-14 03:46:50 · 5 answers · asked by Nivvedan 2 in Physics

1.)San Marino
2.)Palau
3.)Vatican City
4.)Monaco

2007-09-14 03:46:17 · 12 answers · asked by Say-What!? 2 in Geography

In Hungary (population: 10 million) there is a chance to win an Apple Macbook. You have to buy a kind of beer :) and on the back of the label of each bottle there is a code that you can send in through the internet.

Before the game started, a computer randomly selected two dates (days, hours, minutes, maybe seconds as well) a week. If you send your code exactly at the selected times, or you are the first after the selected dates, you win (i.e. you can win two Macbooks every week).
This game lasts for four more weeks. The beer is Stella Artois, which is relatively expensive here, so it is not for the masses.

I am curious, how many codes do I have to send them every day so it becomes VERY likely that I win a Macbook?

2007-09-14 03:46:05 · 2 answers · asked by junglesgal 3 in Mathematics

1.)Estonia
2.) Kazakhstan
3.) Andorra
4.) Uzbekistan

2007-09-14 03:44:23 · 7 answers · asked by Say-What!? 2 in Geography

2007-09-14 03:42:35 · 13 answers · asked by Say-What!? 2 in Geography