Science & Mathematics - 17 September 2007

2007-09-17 09:38:54 · 6 answers · asked by peaches6 7 in Mathematics

5x - 2y = -5
y - 5x = 3

2007-09-17 09:33:14 · 8 answers · asked by Jerry Z 1 in Mathematics

2007-09-17 09:32:55 · 23 answers · asked by colin050659 6 in Geography

the average atomic mass of ga is 69.72 amu. calculate the abundance of each isotope.
other info: gallium consists of 2 naturally occuring isotpes with masses of 68.926 and 70.925 amu

please provide work too thanks!! i woudlnt ask this if i really couldnt figure it out, and i f i could do it on my own i would

2007-09-17 09:32:21 · 2 answers · asked by Anonymous in Chemistry

A room that is 5.0 metres by 2.5 by 2.5 contains 65 kilograms of air, find the volume denstiy.


how do you do this?

2007-09-17 09:28:20 · 3 answers · asked by Anonymous in Mathematics

2007-09-17 09:23:25 · 5 answers · asked by THOMAS N 2 in Geography

A) strokeB) heart attackC) aneurysmD) all of the above

2007-09-17 09:22:45 · 6 answers · asked by Anonymous in Medicine

2007-09-17 09:22:23 · 12 answers · asked by Anonymous in Astronomy & Space

2007-09-17 09:22:23 · 1 answers · asked by LiNnY 3 in Chemistry

2007-09-17 09:22:04 · 5 answers · asked by Anonymous in Medicine

which soap actress has really dramatic facial expressions?????????????????????

2007-09-17 09:20:30 · 7 answers · asked by Anonymous in Other - Alternative

and can you tell me how to solve it in a easy way

2007-09-17 09:19:28 · 6 answers · asked by Slim24/7 5 in Mathematics

2007-09-17 09:19:26 · 6 answers · asked by keeks105 1 in Zoology

I have a friend that is Atheist but I asked her if she would mind me talking to her about my beliefs [Christianity]. She said that she didn't mind but was still a little hesitant because she thinks that I will stop being her friend if she doesn't accept. I assured her that I was not judging her and that I would not desert her if she didn't accept what I had to say although I really wish she would. I'm not trying to shove my beliefs to her and she knows that but I can tell that she's curious about Christianity and what I have to say. I know of many Bible Scriptures that will help me but I just want to see if you may have any that may also help me.

2007-09-17 09:17:56 · 3 answers · asked by Anonymous in Mathematics

It looks like a 9 volt, except it has a rounded crown on the bottom and top. Made by Ray-O Vac., circa 1950s?

2007-09-17 09:16:00 · 1 answers · asked by joseph c 1 in Other - Science

Find the maximum and minimum values of the function f(xyz)=yz+xy subject to the constraints y2+z2=49 and xy=9 . Maximum value is: ?
Minimum value is :?

i woudl really preaciate your help!!

2007-09-17 09:15:11 · 3 answers · asked by dusky_josh 2 in Mathematics

What are these all about?
I really don't understand....

Can somebody please help me??
thanks

1) 4x - 5 = 2x + 7
2) 5y -1 = y + 9
3) 7z - 3 = 11 + 3z
4) t + 8 = 2 - 3t
5) 3p + 2 = 5 - p
6) 5 + 2q = 12 - 3q
7) 8 + a = 5 - 2a
8) 3b - 10 = 5b - 1
9) 3c - 5 = 6 - c
10) 2 + 5d = 7d + 3
11) 2 - 3e = 8 - 6e
12) 4f +11 = 5 + f

2007-09-17 09:15:09 · 5 answers · asked by °♥Amelia Rose♥° 4 in Mathematics

Any drug interactions or contraindications?

2007-09-17 09:14:44 · 2 answers · asked by D L 2 in Medicine

Hi few questions on how these are done, for my college Engr 10 class ( intro to Engr). Please tell me equations and show how done.

1. A person running at the pace of 5mph expends 300 kilocalories of energy per hour.

a)Find the power of the runner is exerting while running.

b)Find the total energy exerted by the runner in a 10k run

I got 343.02 kc is that right?


2. It took you 2 hours to drive to Berkeley and back with a total distance of 100 miles traveled

a) Your car gets 34.0 miles per gallon. How much energy have used for this trip?

b) What is the average power consumption for this trip?

c) We know that energy does not vanish ( energy conservation). Where does the energy go ( consumed) after the trip?

2007-09-17 09:14:28 · 3 answers · asked by Ali G 1 in Physics

Write in scientific notation. 889,610,000,000

2007-09-17 09:12:08 · 9 answers · asked by Anonymous in Mathematics

what is human and physical geography?

2007-09-17 09:11:54 · 2 answers · asked by The Way 4 in Geography

2007-09-17 09:08:26 · 4 answers · asked by chris t 2 in Chemistry

Today in Chemistry I found out that steam is colorless, this is noticable when you boil a kettle and where the steam is coming out you can see its colorless but further up you can see a whitish cloud. What is the whitish cloud, why is steam colorless and the cloud white? what is it?

2007-09-17 09:08:04 · 4 answers · asked by Kaz Wilkosz 2 in Chemistry

I can not think of any logical answer, unfortanatly, and I know the problem is possible to work out. Do I just have to change the variables to any number i'd like to?

2007-09-17 09:07:54 · 2 answers · asked by Anonymous in Mathematics

How would you define infinity to a bright and enquiring 7yr old mind? His understanding so far is- "Infinity is the highest number and it would take forever to get there". What do you say?

2007-09-17 09:06:38 · 11 answers · asked by ? 2 in Mathematics

Use the product, quotient, and power rules of logarithms to rewrite the expression as a single logarithm. Assume that all variables represent positive real numbers.
.

1/2 log2 (x^4 )+ 1/4 log2(x^4) - 1/6 log2 x

2007-09-17 09:03:08 · 4 answers · asked by Kathy W 1 in Mathematics

The delta Hvapor of water is 40.7 kJ/mol.
I understand how to work the problem but I do not know where the book comes up with 9.81689 when you go to multiply vapor pressure one to get the pressure of the second one. Please help...confused!!!

2007-09-17 08:58:29 · 2 answers · asked by 00000000 1 in Chemistry

2007-09-17 08:56:53 · 4 answers · asked by diayocem 2 in Zoology

sin 5pi = sin pi

True or false?

2007-09-17 08:55:44 · 5 answers · asked by sillyboys_trucksare4girls 2 in Mathematics

I would like to be able to look up exactly where the moon is in its orbit at any given time, where the other planets are and so on.

Thanks for any suggestions :-)

2007-09-17 08:54:03 · 3 answers · asked by Anonymous in Astronomy & Space