Science & Mathematics - 25 November 2006

When the net external force on a closed system is zero, it is described as
a) an isolated system
b) a normal system
c) motionless
d) non-accelerating

2006-11-25 05:45:15 · 6 answers · asked by lindi 2 in Physics

2006-11-25 05:43:04 · 2 answers · asked by Anonymous in Physics

plz i need it now if u can help its really important

2006-11-25 05:40:31 · 3 answers · asked by Saba F 1 in Chemistry

3 reasonably intelligent math tutors cannot for the life of them get this one:

xy = 1

x + y = 3

x^2 + y^2 = ?

What is the sum of x squared and y squared? Do we need to know what the values of x and y are?

2006-11-25 05:40:00 · 8 answers · asked by Guelph 5 in Mathematics

2006-11-25 05:31:37 · 1 answers · asked by xxh_nguyenxx 1 in Mathematics

A solution is prepared by adding 48.8 mL of concentrated hydrochloric acid and 17.5 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint: Concentrated HCl is 38% HCl (by mass) and has a density of 1.19 g/mL; concentrated HNO3 is 70.% HNO3 and has a density of 1.42 g/mL.]
how do i find pH

2006-11-25 05:28:02 · 2 answers · asked by smile 1 in Chemistry

what is bad about the endoplasmic reticulum?

2006-11-25 05:25:54 · 4 answers · asked by Anonymous in Biology

2006-11-25 05:25:39 · 7 answers · asked by Anonymous in Biology

what is 33 and 1/3 in a single fraction?

2006-11-25 05:22:25 · 18 answers · asked by Anonymous in Mathematics

I was just reading some comments about al gore and "an inconvenient truth" - being a bit surprised that obviously many americans are denying even the existance of global warming.

So why is the weather acting crazy everywhere? Are those some special effects used by the democrats to undermine their arguments???

2006-11-25 05:22:12 · 5 answers · asked by Rika 2 in Weather

AgNO3 + NaNO3 ->

2006-11-25 05:21:24 · 4 answers · asked by ? 2 in Chemistry

2006-11-25 05:19:38 · 4 answers · asked by the professor 2 in Chemistry

2006-11-25 05:17:55 · 5 answers · asked by Anonymous in Zoology

2006-11-25 05:17:31 · 1 answers · asked by heehehe p 2 in Chemistry

1. 9x
2. 97m^2n^2

2006-11-25 05:16:51 · 4 answers · asked by indiangirl!=D 3 in Mathematics

The length of a rectangle is 4 ft longer than its width. If the perimeter of the rectangle is 36ft, find its area.

2006-11-25 05:16:10 · 11 answers · asked by Ken H 1 in Mathematics

I like to really let a massive fart go every once in a while,
you know, like a real ripper :D

2006-11-25 05:15:34 · 13 answers · asked by Icarus 6 in Biology

I have a basic idea about this but I want to see other people's take on it. It would also be helpful if you could explain how you thing photons are created.

2006-11-25 05:14:43 · 7 answers · asked by the professor 2 in Physics

2006-11-25 05:14:25 · 3 answers · asked by HEATHER W 1 in Biology

Many viruses mutate (HIV, AIDS, H5N1,Ebola) faster than expected... Giving medical care workers and doctors little time to ever develop medication to help fight or prevent these virus' from mutating then jumping from species to species, or eventually, human to human... Many Evolutionists and Scientists believe that virus are the next big step in evolution, and that the **** sapiens species is coming to an end.

An article I found today supports the idea of virus change, or evolution. It concerns H5N1, the Bird Flu, and how it has already began to mutate (http://healthandfitness.sympatico.msn.ca/Outbreaks+Show+Bird+Flu+Virus+Is+Changing/News/ContentPosting.aspx?isfa=1&newsitemid=185623046&feedname=CP-HEALTHSCOUT&show=True&number=5&showbyline=False&subtitle=&detect=&abc=abc).

Your thoughts....

2006-11-25 05:10:32 · 8 answers · asked by Anonymous in Other - Science

2006-11-25 05:06:08 · 11 answers · asked by csmitty 1 in Mathematics

regarding:
0.269g of Nitric Acid (HNO3) are added to 36.3mL of 1.18M Nitric Acid solution. Assuming there is no change in volume, calcuate the final concentrations of ions.
-Would the [H+]=1.18M ; [NO3-]=1.18M?
-I think the molarity of .269g HNO3 is equal to .149M, but the problem says that Nitric Acid has Molarity of 1.18M, which is where the confusion kicks in. Am I supposed to find some strange correlation between these numbers, or just disregard the difference? Anyway, is my answer at all on target?

ALSO-

What are the concentrations of ions in 0.015M Potassium Sulfate (K2SO4)?
It couldn't be as simple as... [K+]=0.03M ; and [SO4 2-]=0.015M...could it?

please and thank you!

2006-11-25 05:05:37 · 1 answers · asked by Anonymous in Chemistry

some things were in the the glass and I went to put a hair holder in the glass and it just exploded

2006-11-25 05:02:53 · 5 answers · asked by chante19772004 1 in Physics

some things were in the the glass and I went to put a hair holder in the glass and it just exploded

2006-11-25 05:02:07 · 3 answers · asked by chante19772004 1 in Physics

2006-11-25 05:01:54 · 6 answers · asked by John 1 in Engineering

Why did they call it a Asian and African Elephant,can they just call it a whole Elephant so no need to confuse.Don't Tell me because 'they came from a another country''.I mean whats the difference about the Appearance of them both.

2006-11-25 05:00:53 · 8 answers · asked by DaRkAngeL XIII 3 in Zoology

I see the American aren't so good at maths.....you didn't know that 2+2 / 2="3".....you should know that the Romanian are maths teachers.....----I wanna see if you know this one.

2006-11-25 04:58:07 · 13 answers · asked by Beta01 3 in Mathematics

2006-11-25 04:56:48 · 13 answers · asked by Anonymous in Mathematics

2006-11-25 04:56:43 · 3 answers · asked by simar 1 in Engineering

How is it possible to fail a drug test when I don't snort coke?

2006-11-25 04:55:36 · 4 answers · asked by Shani Y 1 in Medicine