Science & Mathematics - 12 February 2007

Iv been stuck on this question FOREVER. The question is "Create a Magic Square that uses integers from -4 to +4" can someone please make me a magic square or something! I feel like crying Im so stressed! Help VERYY much appreciated, easy 10 points. :(

2007-02-12 14:48:00 · 2 answers · asked by Anonymous in Mathematics

2007-02-12 14:47:48 · 2 answers · asked by Anonymous in Mathematics

Okay the orginial problem was this... Determine the emperical and molecular formula for caffine that contains 49.47% carbon, 5.20% hydrogen, 28.86% nitrogen, and 16.47% oxygen. The molecular mass of caffine is 194.2 g/mole.

I have already determined that the emperical formula is C4H5N2O.

I know that you take 194.2/43.04 and that gives you roughly 4.5 which in this case would round to 5. I know that this 5 is what determined the molecular formula. What my question for you is, in the equation C4H2N5O. Does the 5 get added to the subscripts or multiplied?

2007-02-12 14:47:20 · 1 answers · asked by shane200388 1 in Chemistry

what lab techniques do you ues to help ensure that the gas collecting bulb contains only the desired gas (NOT AIR, ECT)?

2007-02-12 14:47:18 · 1 answers · asked by kiwi 1 in Chemistry

(sinx)^e^x

Basically the sinx, quantity raised to the e power of x

2007-02-12 14:42:57 · 2 answers · asked by MechFlight 1 in Mathematics

P^2+3p+1
Factorize in to a perfect square?

2007-02-12 14:42:47 · 3 answers · asked by Mr.No IT ALL 1 in Mathematics

What type of bond is this and what role do "hybrid orbitals" play in determining the shape of the molecules formed?

2007-02-12 14:41:50 · 4 answers · asked by shafali v 1 in Chemistry

2007-02-12 14:39:00 · 16 answers · asked by nick w 1 in Weather

2007-02-12 14:38:52 · 4 answers · asked by Anonymous in Chemistry

2007-02-12 14:38:41 · 1 answers · asked by clark_reid_itl 1 in Chemistry

help...I want to know HOW to cumpute the F-value for any degrees of freedom in the numeration/denominator at the .05 statistical level.

2007-02-12 14:37:15 · 2 answers · asked by UknowWho 2 in Mathematics

Why does the mass of water and the volume of water (solvent) are exactly the same number?

2007-02-12 14:36:54 · 4 answers · asked by nikkecola17 3 in Chemistry

if 10 layers of paper are about 1 mm thick, how thick is the piece of paper after 10 folds?

what is the maximum number for times you can fold a piece of paper?

if you were the piece of paper the following number of times how many layers would you have? in exponential form?
a) 5 b) 7 c) 50

2007-02-12 14:36:05 · 3 answers · asked by Anonymous in Mathematics

What are some other mixtures besides Pig Iron and Steel that are made into manufactured products??????? Pleasee Helpp and HURRYYY PEOPLE !!!

2007-02-12 14:35:49 · 7 answers · asked by Anonymous in Chemistry

I've noticed on here many people have been asking about the Mayan Calender ending December 21, 2012. 2012 is NOT the end of the world and I would suggest you stay away from any books telling you how you could survive. Huge Scam. 2012 in Mayan calender is when Quetzalcoatl, the mayan feathered serpent their god is to return to earth and unite all of mine kind into a universal belief. It's also the darkest day of the year and its the end of a 5000 year cycle when all of the planets align on the milky way.

Anyways, I thought I'd clear this up. IT'S NOT THE END OF THE WORLD!!!

2007-02-12 14:35:18 · 14 answers · asked by nokturnemorte 1 in Astronomy & Space

How would Aristotle interpret this observation? How would Galileo interpret it?

2007-02-12 14:33:56 · 5 answers · asked by Vy-Vy 3 in Astronomy & Space

2007-02-12 14:33:19 · 3 answers · asked by Anonymous in Mathematics

This map, I am speculating, will be spatial and have all topics on the internet in clusters like the world lit up in the night and seen from a satellite. Where there is more activity there would be more light. This light could be related to the number of page hits, or backlinks, or bytes of data or a mixture of all. It could be a map of the world wide web, spatially so that people can get a sense of where the most activity is and try and see the diversity of topics as well. A lot of people could get involved in this project. (or has this already been done? : p I guess not. There is an internet traffic report for networks but this would be different.

2007-02-12 14:31:10 · 1 answers · asked by chamath a 2 in Mathematics

Is this a good idea or a bad one and why?

2007-02-12 14:29:26 · 2 answers · asked by Stan S 1 in Engineering

2007-02-12 14:29:01 · 8 answers · asked by Luca B 2 in Earth Sciences & Geology

I am thinking of three consecutive integers. The square of the largest one equals the sum of the squares of the other two. Find the integers.

2007-02-12 14:27:45 · 10 answers · asked by dance_lover_2010 1 in Mathematics

The telescope was set up and pointed at Venus. My mother can see the planet clearly yet when I put my eye to it, it is just blackness. I do wear glasses and I tried it with glasses, no glasses and contacts. The same each time. We even tried pointing it at a street light, same problem. Can some people just not see through a telescope?

2007-02-12 14:27:38 · 2 answers · asked by Ella S 1 in Astronomy & Space

Given a right triangle with legs a and b, hypotenuse c, altitude h dividing the hypotenuse in to segments x and y

h= 4 root 3
y= 4

2007-02-12 14:27:08 · 1 answers · asked by Natalie F 1 in Mathematics

what is the equilibrium constant for dihydrogen monoxide?

2007-02-12 14:24:43 · 3 answers · asked by liveityourway 1 in Chemistry

How do you integrate this:

integral of (-5)/(x^2 +1) dx

is it -5ln(x^2 + 1) + C ?

2007-02-12 14:24:09 · 5 answers · asked by avalentin911 2 in Mathematics

I`m a 10th grade girl and am interested in engineering-particularily mechanical. My math and science background is very good-I have always been in the advanced courses. I`m trying to decide if I should go into engineering because I long to design and improve our world, but I had disliked a robotics and inventions class that I took. I`m not in love with math, but I`m fascinated by machines and how they work. What`s it really like being a mecha engineer?

2007-02-12 14:23:24 · 4 answers · asked by Anonymous in Engineering

I wonder if the difference between both is as big as their price. Can electrosurgery be used in the same way as lasers? How do both compare when it comes to tissue healing? Any comment is appreciated.

2007-02-12 14:22:27 · 2 answers · asked by brysonfan 2 in Medicine

x^2 + 3x +2

^2 meaning squared

2007-02-12 14:22:02 · 8 answers · asked by Fruits_Basket_Lover 2 in Mathematics

81r^2 - 36rs + 4s^2

^2 meaning squared.

Please Help!!!

2007-02-12 14:20:05 · 2 answers · asked by Fruits_Basket_Lover 2 in Mathematics

okay ive seen gray whale and grey whale.. what is the correct spelling grey or gray it sounds confusioning i know please help

2007-02-12 14:20:04 · 6 answers · asked by teddy bear 2 in Zoology