Science & Mathematics - 11 September 2007

3(-4)+(-5)²

and

6(3²+2)11
see i was thinking it was like -726 or something..but it just doesnt sound right?

2007-09-11 13:30:27 · 15 answers · asked by Anonymous in Mathematics

I don't know if it's just me, but when you have a silent, empty room, what is that high-pitched noise you always seem to hear, and where is it coming from? Thanks!!

2007-09-11 13:29:52 · 7 answers · asked by Dehydration Synthesis 4 in Other - Science

i need to know the defintions for...
Independent Variable
Dependent Variable
Validity
Conclusion
(for a science experiement...)
I need to know what goes in those catagories and the defintions.

2007-09-11 13:29:37 · 1 answers · asked by Anonymous in Other - Science

- x + 4 – 9x + 3 > 7(x – 2)

2007-09-11 13:28:41 · 2 answers · asked by alton l 1 in Mathematics

I still am not entirely sure of what a complex organization is, but I think knowing a few examples of some would help my understanding.

2007-09-11 13:28:33 · 1 answers · asked by Michael F 1 in Biology

Coulomb's law for the force of repulsion between two charged bodies is known as an inverse square law; the force is inversely proportional to the square of the distance between the objects. For purposes of this problem,

F=C/(r^2).

Holding the charged objects at a distance of r1 apart gives a force of F1. When moving the objects to a distance of r2 apart, you observe a force F2 that is 2.9 times that of F1. This must mean that r2 = ______ r1.

Any help would be greatly appreciated.

2007-09-11 13:28:09 · 6 answers · asked by Anonymous in Mathematics

2007-09-11 13:26:13 · 1 answers · asked by annhall90 1 in Chemistry

2007-09-11 13:26:10 · 1 answers · asked by Alex D 1 in Earth Sciences & Geology

isn't it 2.702?

2007-09-11 13:25:31 · 2 answers · asked by Anonymous in Chemistry

?

2007-09-11 13:24:59 · 2 answers · asked by Russel 1 in Mathematics

2007-09-11 13:23:43 · 2 answers · asked by Danny M 1 in Mathematics

were there any planets visible this morning around 300am i thought i saw to reddish spots but i wasnt sure if they were

2007-09-11 13:23:36 · 8 answers · asked by Anonymous in Astronomy & Space

has ne1 been to college to study paranormal behavior??

2007-09-11 13:23:27 · 12 answers · asked by .::country gurl in a 4X4::. 2 in Paranormal Phenomena

what must be the sum of a single lenght and width?

a car rental agency charges 140$ a week plus 0.19 a mile for each mile driven over 200 miles (200 free miles)

find the cost of renting a car for a week and driving 750 miles?

2007-09-11 13:22:29 · 9 answers · asked by Alejandro Ktracho!! 1 in Mathematics

1. 1/2 (-1/3) + 1/4 = ?

2. -2/3 + (-1/3) + (-1 1/3) = ?

THANK YOU SO MUCH!! remember, 10 points.

2007-09-11 13:22:16 · 5 answers · asked by Anonymous in Mathematics

2007-09-11 13:21:21 · 3 answers · asked by Anonymous in Chemistry

Neon, has three different isotopes. 90.51% of neon atoms have a mass of 19.992 amu. 0.27% of neon atoms have a mass of 20.994 amu. 9.22% of neon atoms have a mass of 21.991 amu. What is the adverage atomic mass of neon. and how did you get that.

my answer: 20.992 amu. is it correct?

2007-09-11 13:20:12 · 3 answers · asked by nothinbutnet2009 4 in Chemistry

2007-09-11 13:19:30 · 7 answers · asked by TANYA S 1 in Mathematics

Im actually serious about your thoughts, i really want to know wat do you believe in, plz dont take it thr wrong way, i genuinely want to know your thoughts, thanks.

2007-09-11 13:19:00 · 23 answers · asked by Seattler 3 in Astronomy & Space

please factor this FULLY, and please show me STEP BY STEP. thank you for your help, i will give best answer 10 points.

2007-09-11 13:18:55 · 4 answers · asked by AnswerGirl 2 in Mathematics

this is for a math project

2007-09-11 13:18:16 · 9 answers · asked by 1234 1 in Mathematics

Im doin a presentasion about fingerprints so please Answwe

2007-09-11 13:18:07 · 21 answers · asked by Anonymous in Other - Science

"The absorption spectrum of a hydrogen atom contains dark bands at specific wavelengths. The emissions spectrum of a hydrogen atoms contains bright bands at the same wavelengths"
Explain why.
HELP ME! :gonk:

Another question asked was, "Contrast the properties of diamagnetism and paramagnetism, give z examples of each. Is a lone germanium atom paramagnetic or diamagnetic

2007-09-11 13:18:06 · 1 answers · asked by Anonymous in Chemistry

we all know that

bi - 2
tri - 3
quad - 4
pent - 5
hex - 6
oct - 8

but what is 7,9 and 10?

2007-09-11 13:16:33 · 5 answers · asked by Weedman 3 in Mathematics

if we have a graph of function f(x), how can we graph the derivative of that graph without knowing the equation of that graph ?? just to sketch an approximate graph.
I know that if we have a peak then the derivative would be 0.
If the graph is increasing, would the derivative be increasing or decreasing ? would it be positive or negative ?
If we have a quadratic function then the derivative would be a line that intersect the x-axis where the peak is, don't we need another point to know how to sketch the graph ?? like the y intersect for example.
Plz help me and remember that I have to sketch it without knowing the equation, and it would be approximate.

2007-09-11 13:16:28 · 6 answers · asked by thatisme 2 in Mathematics

2007-09-11 13:16:22 · 3 answers · asked by ssjmg2477 2 in Zoology

2007-09-11 13:16:11 · 6 answers · asked by Eileen92 2 in Mathematics

(need pics to believe since I've been told lies)please tell me the truth...with ur own pics....i know which ones came off the net..

2007-09-11 13:14:12 · 4 answers · asked by .::country gurl in a 4X4::. 2 in Paranormal Phenomena

Determine whether the point is a solution to the system of equation.
( - 3, - 4)
4x-7y=16
-6x+y=14



Please show all work and thank you for taking the time to solve this equation.

2007-09-11 13:13:27 · 9 answers · asked by Anonymous in Mathematics

A clothesline has a mass M, and each end makes an angle X with the horizontal. What is a) the tension at the ends of the clothesline? b) the tension at the lowest point? The curve is hanging under it's own weight (catenary curve).

2007-09-11 13:11:35 · 3 answers · asked by J 1 in Physics