Science & Mathematics - 31 October 2006

a form of phosphorus called red phosphorus is used to match heads. when 0.062g of red phosphorus burns, 0.142g of phosphorus oxide is formed. What is the empirical formula of this oxide?

2006-10-31 09:52:48 · 5 answers · asked by Anonymous in Chemistry

2006-10-31 09:51:44 · 1 answers · asked by Josephinne U 1 in Engineering

Its basic math. Fractions and measurements. I am looking for someone who is very good at math.

2006-10-31 09:50:41 · 10 answers · asked by chloerochelle102887 1 in Mathematics

2006-10-31 09:49:27 · 8 answers · asked by Bruce L 1 in Mathematics

And how is this calculated?

2006-10-31 09:47:13 · 1 answers · asked by Anonymous in Chemistry

why does jacobs ladder arc and a high voltage arc appear to look different?

2006-10-31 09:46:09 · 5 answers · asked by csnape2003 3 in Physics

I'm a physics student in VA, what's the best way to go about getting a physics paper publisehd in major journals..if it is indeed ground breaking?

2006-10-31 09:43:22 · 3 answers · asked by Jae G 2 in Physics

We want to prove mathimatically,statistically,ecologically or in any way,that a half acor pond remains one and is not devided in two because of an 8 foot diameter pipe.The pipe is 4 foot underwater and 4 foot above and is covered with a bridge.The purpose of this pipe is to equalize the water flow.This project is not made yet and if need to, the pipe could be bigger.How do we prove this pond is still considered one???

2006-10-31 09:42:29 · 3 answers · asked by Irene D 1 in Engineering

2006-10-31 09:40:32 · 9 answers · asked by i am a nigga dat iz in da game 1 in Geography

2006-10-31 09:34:26 · 1 answers · asked by Scott R 6 in Mathematics

2006-10-31 09:33:47 · 3 answers · asked by bebo 1 in Geography

This is from my pre calc class and i was hoping that someone out there can help me with this problem. I'm trying to figure out what x and y equals. I know how to do it using the substitution method, but the quadratic throws me off. Please Help.

2006-10-31 09:32:43 · 7 answers · asked by Anonymous in Mathematics

This is the answer we were given in our practise exam:

"Any composite number can be written as a product of prime numbers."

But I still don't get it, can anyone explain it thoroughly and in basic elementary terms from scratch?

2006-10-31 09:32:34 · 5 answers · asked by Laura 1 in Mathematics

They estimate that it is 4.5 billion years old. I would like to know how did they get this figure? And also the same about the Sun?

2006-10-31 09:29:40 · 12 answers · asked by Siu02rk 3 in Astronomy & Space

Leeches have 34 segments, what are they called?

2006-10-31 09:28:56 · 1 answers · asked by Christine G 1 in Biology

Hi everyone :),
I have one question in my chemistry assignment that's giving me hard time, if you know how to answer it, please reply. Here it is:
"Suggest the element (or group of the elements) that could be the central atom, X, in: X2S, nonlinear molecule."
My problem is how can you have 2 identical atoms as the central atoms in a molecule of 3 atoms! Shouldn't S (sulfur) be the central atom? Anyway, sulfur is not in this formual, but X is! So what element(s) could X be?

Please answer today! If not, then don't waste your time :)

Thanks in advance!

2006-10-31 09:26:33 · 1 answers · asked by F.L. 1 in Chemistry

2006-10-31 09:25:36 · 6 answers · asked by Anonymous in Chemistry

By the official definition of a planet, Pluto is not a planet but a dwarf planet...which technically isn't a true planet. Also by this definition, Earth and Jupiter aren't true planets.
If Dwarf planets are deemed true planets, then we have 11 known planets in our solar system (Mercury, Venus, Earth, Mars, CERES,
Jupiter, Saturn, Uranus, Neptune, PLUTO, ERIS)
So, would Pluto be considered a true planet, thus having 11 planets in the solar system...or not a true planet?

2006-10-31 09:24:24 · 16 answers · asked by Bilko! 2 in Astronomy & Space

2006-10-31 09:20:50 · 5 answers · asked by Anonymous in Other - Science

2006-10-31 09:20:27 · 12 answers · asked by Marie E 1 in Botany

2006-10-31 09:15:42 · 15 answers · asked by scott l 1 in Zoology

2006-10-31 09:15:32 · 12 answers · asked by PurpleWatermelon 2 in Mathematics

there are two common oxides of sulfur. One contains 32g of sulfur for each 32g of oxygen. The other oxide contains 32g of sulfur for each 48g of oxygen. What are the empirical formulas for the two oxides?

2006-10-31 09:12:35 · 5 answers · asked by Anonymous in Chemistry

2006-10-31 09:11:08 · 6 answers · asked by ali k 1 in Earth Sciences & Geology

not homework for home

2006-10-31 09:09:45 · 7 answers · asked by joseluis g 1 in Mathematics

Ok, I am a believer that math is not perfect as all math professors claimed to be. So here is my story.
3 men rent a room at a hotel, at the front desk they tell them that it will cost them $30 for the night for the room with 3 beds, so each of them pay $10.
10 minutes later, the front desk calls the bell boy and ask him to return $5 to the 3 gentlemen that just checked in and are now in room 1015. On his way to the room the bell boy decided that he can’t split the 5 ones into the 3 men, so he puts $2 in his pocket, and knock on the door and tell them that they were over charge for the room and hands each of the men $1 so now each men paid after their refund, $9 and here is where all happens, $9 X 3 = $27 + the $2 he packed in = $29, where is the other $1 ?

2006-10-31 09:04:27 · 16 answers · asked by Ricardo R 2 in Mathematics

flies level to the ground at an altitude of 12 km with a constant speed of 186 m/s relative to the Earth.

What is the magnitude of the plane's angular momentum relative to a ground observer directly below the plane in kg . m^2/s?

Does this value change as the plane continues in motion along a straight line (increase, change in random pattern, decrease, remain constant)?

2006-10-31 09:04:25 · 2 answers · asked by Anonymous in Physics

2006-10-31 09:00:14 · 18 answers · asked by Balony 1 in Zoology

Are you familiar with Engineering Technology??, do you anyone that has a job like that or studying that major?, well can you please tell me, what is Engineering Technology about?, would it be a good career? and also, if in the future i get a job, what would my occupation's name be? Engineering Technician? please tell me, it's important

2006-10-31 08:58:46 · 5 answers · asked by ♥Meow♥ 5 in Engineering

I'm watching "Time Travel" on the science channel.

There are scientist who say its theoreticlly possible to create a wormhole to beat the speed of light. I know some of you will get the urge to challege the issue of them being possible. I'm asking, IF it were possible whats your theory's for the conditions inside the wormhole. What would that be like?

2006-10-31 08:56:54 · 6 answers · asked by 12ated12 2 in Astronomy & Space