Science & Mathematics - 8 July 2007

A nurse wishes to add water to 30 ounces of a 10% solution of whatever to dilute it to an 8% solution. How much water will she have to add?
x+.10(30)=.08(x+30)?
I am old an lost!!!

2007-07-08 18:39:36 · 3 answers · asked by calired67 4 in Mathematics

i want melt a granite stone without any sounds

2007-07-08 18:39:24 · 3 answers · asked by Anonymous in Chemistry

2007-07-08 18:37:58 · 2 answers · asked by salvador9926 1 in Mathematics

2007-07-08 18:36:57 · 24 answers · asked by pixiedustplease 3 in Geography

2007-07-08 18:34:21 · 1 answers · asked by salvador9926 1 in Mathematics

2007-07-08 18:27:29 · 9 answers · asked by Anonymous in Weather

a. 30
b. 45
c. 60

I keep getting 3 as my answer. Anyone know how to work this problem?

2007-07-08 18:24:55 · 3 answers · asked by nitesh8de 2 in Mathematics

2007-07-08 18:21:32 · 3 answers · asked by WOMBAT, Manliness Expert 7 in Mathematics

f(x)=√(x-1) ; g(x)=1/(x-7)

2007-07-08 18:16:42 · 2 answers · asked by Anonymous in Mathematics

I've come up accross so many books and articles and people as well as movies saying numbers have got power when organized in a specific "wierd" and "mysterious" power ..

People who know little about magic agree with this idea and they say letters and numbers can do these in conjunctions ...

Do you really believe in so ..
I am confused but about to be convienced of this ...

2007-07-08 18:15:37 · 12 answers · asked by twerex 2 in Other - Science

2007-07-08 18:13:31 · 4 answers · asked by Pimpmeister 1 in Mathematics

My niece has a BS in economics and can't decide about law school.
She is very kind, a truly lovable human being, but being so smart has cost her any number of relationships with men, because she is so perceptive she can tell she is in some way incompatible with each. This is so depressing. Should she marry knowing it won't work out?
She can't do that. She has too much respect for the institution of marriage and doesnt' want a divorce.
Where are the empathetic brilliant guys in the U.S. who would like to marry?
My niece doesn't know I'm asking, and would be embarrassed, but I can't help myself.
You are supposed to marry someone, if possible, within 5 IQ points of your own IQ.
This is a serious question, please no nasty comments.

2007-07-08 18:09:48 · 25 answers · asked by Anonymous in Physics

2007-07-08 18:07:45 · 2 answers · asked by Anonymous in Weather

What is the equation of the ellipse with foci at (0,-4) and (0,4) and the sum of it's focal radii being 10?

2007-07-08 17:57:49 · 2 answers · asked by Sara 3 in Mathematics

if our oil reserves are being depleted and to prevent another world war to be, what is the best alternative?

2007-07-08 17:54:45 · 4 answers · asked by dante s 1 in Earth Sciences & Geology

2007-07-08 17:53:20 · 16 answers · asked by romi 2 in Weather

w * square root of 45z^5 + 7z^2 square root of 20zw^2

2007-07-08 17:53:01 · 1 answers · asked by mario b 1 in Mathematics

by a meteorit or comet that can cause a global catastrophe?

2007-07-08 17:41:09 · 9 answers · asked by alfonsoarredondo 2 in Astronomy & Space

How would you add polar coordinates without converting to cartesian and back.

For simplification, I will use the example of a robot. Lets say I drive 50m with an azimuth of 3rad. I then take a sensor reading at 2rad from the robot and it returns a distance of 10m from the robot to an object.

How do I calculate the objects position from the starting point of the robot without first converting into cartesian, adding the (x,y) pair, and then converting back into polar?

2007-07-08 17:40:12 · 1 answers · asked by Gary 1 in Physics

If you put HCl acid on a piece of galvanized iron, how can you determine the thickness of zinc?

2007-07-08 17:40:04 · 1 answers · asked by My OnLy HoPe 1 in Chemistry

2007-07-08 17:26:06 · 9 answers · asked by John P 1 in Earth Sciences & Geology

sound 1 has an intensity of 38.0 W/m^2. sound 2 has an intensity level that is 2.5 dB greater than the intensity level of sound 1. what is the intensity of sound 2?

please help i dont get it :( . thanks!! any help would be great!!!! i think the answer is supposed to be 67.6 W/m^2 but how do u work it out? please show work thanks!

2007-07-08 17:21:57 · 2 answers · asked by spaceranger2010 2 in Physics

2007-07-08 17:21:25 · 12 answers · asked by Anonymous in Astronomy & Space

find the meaning of seeing a shooting star. I feel that this was a sign for me, but what kind of a sing is what i want to know. Anyone help me!!
Sammi

2007-07-08 17:20:16 · 6 answers · asked by ? 2 in Astronomy & Space

I have heard about lots of things prouving that the famous said: "one small step...a giant step" was said on earth!

2007-07-08 17:20:08 · 12 answers · asked by TaeKwonDo87 2 in Astronomy & Space

2007-07-08 17:11:21 · 8 answers · asked by Anonymous in Weather

Is it in Mexico Or Egypt

2007-07-08 17:07:23 · 7 answers · asked by Chris 3 in Geography

I'm new to spice. So far I have an AC source, ground, and a resistor in a circuit. How do I get a graph showing the sine wave output of the ac?

2007-07-08 17:02:34 · 1 answers · asked by - 3 in Engineering

Do you think that there is a possibility that we may have existed as some form of being before we were born? Like living here is just an experience?

2007-07-08 17:00:30 · 5 answers · asked by toothfairy.2006 3 in Astronomy & Space

You are driving on a trip of 2640 miles. You begin the trip with a full tank of gas and after traveling 420 miles, you refill the tank for $22. 91. How much should you plan to spend on gas the entire trip? please answer! thank yoU

2007-07-08 17:00:26 · 5 answers · asked by camille_carson 1 in Mathematics