Science & Mathematics - 23 August 2007

Like shooting the ejecta just a few meters around, for a couple of minutes ...

2007-08-23 18:59:26 · 3 answers · asked by Anonymous in Earth Sciences & Geology

It is a greenish turquoisish powder with the grains being about the size of grains from gun powder residue. Its chemical make up is

[Co(en)sub2 Cl sub2]Cl

The name written out is diethylenediamine dichloride cobalt 3 chloride

2007-08-23 18:56:32 · 2 answers · asked by lilfry14 3 in Chemistry

2007-08-23 18:53:24 · 4 answers · asked by ChArLeNe N 1 in Mathematics

2007-08-23 18:52:52 · 4 answers · asked by ChArLeNe N 1 in Mathematics

2007-08-23 18:52:21 · 3 answers · asked by ChArLeNe N 1 in Mathematics

2007-08-23 18:45:28 · 6 answers · asked by ChArLeNe N 1 in Mathematics

2007-08-23 18:45:11 · 9 answers · asked by Anonymous in Physics

2007-08-23 18:42:45 · 5 answers · asked by Sharavana Mahendran 3 in Paranormal Phenomena

2007-08-23 18:35:41 · 1 answers · asked by taejoon l 1 in Botany

2007-08-23 18:32:24 · 4 answers · asked by jen b 1 in Mathematics

2007-08-23 18:31:09 · 5 answers · asked by jen b 1 in Mathematics

2007-08-23 18:30:36 · 3 answers · asked by jen b 1 in Mathematics

2007-08-23 18:30:15 · 6 answers · asked by Luda R 1 in Physics

Has anybody ever thought about why we weigh more on earth than on the moon?I know there's an answer...But i would like to know.Anybody want to explain it to me?

2007-08-23 18:25:25 · 8 answers · asked by jayy 2 in Astronomy & Space

the six trig functions are: sin, cos, tan, csc, sec, & cot.

Thanks in advance to anyone who can help!!

2007-08-23 18:16:55 · 4 answers · asked by Nicole J 1 in Mathematics

2007-08-23 18:16:51 · 4 answers · asked by mathstudent 2 in Mathematics

I have a mysterious roll of fine wire mesh that was given to me years ago by my brother. He died in 86'. I have recently retired and am now looking into this. He said it was valueable. While it looks like it might have some gold in it the whole roll looks like brass to me. I don't have a clue(?).

Can you give me a lead on a scientific company that produces such a kit and about what I should expect to have to pay for it?

Thanks.

2007-08-23 18:10:44 · 2 answers · asked by Paul 3 in Chemistry

Employees of a large company all choose 1 of 3 levels of health insurance coverage, for which premiums, denoted by x, are 1, 2, 3 respectively. Premiums are subject to a discount, denoted by y, of 0 for smokers and 1 for non-smokers. The joint probability density function of x and y is given by:

p(x,y) = { [(x² +y²)/31] for x = 1, 2, 3, and for y = 0, 1 }

0 otherwise

Calculate the Variance of (x – y), the total premium paid by a randomly chosen employee.

2007-08-23 18:00:13 · 2 answers · asked by Anonymous in Mathematics

Im having trouble solving this problem... I've been trying to solve it for the past two days but i simple cant. Please help me.

Express x in terms of the other variables in the picture.

to see the picture go to

http://www.math.unb.ca/ready/paper/img118.gif



Please provide an explanation on how to solve the problem. Thank You.

2007-08-23 17:56:36 · 3 answers · asked by senseless.student 1 in Mathematics

There are two lines that pass through the point (3,0) and are tangent to the parabola f(x) = 9 x^2

One of those two lines is the x-axis. Find the equation for the other line. (Suggestion: First find the value of a shown on the graph).

I'm quite confused with this. Any suggestions?

2007-08-23 17:51:12 · 2 answers · asked by AppleCard! 2 in Mathematics

x + 20 = y + 80. What is the value of xy.

2007-08-23 17:50:55 · 5 answers · asked by Bao 2 in Mathematics

both are 3x3

1 1 1
a b c
a^2 b^2 c^2

multiplied by :

1 a a^2
1 b b^2
1 c c^2

2007-08-23 17:49:56 · 2 answers · asked by Anonymous in Mathematics

2007-08-23 17:45:08 · 5 answers · asked by AnDru N 2 in Botany

2007-08-23 17:43:51 · 10 answers · asked by F R 2 in Paranormal Phenomena

identify, by name, each polar graph.give at least one characteristic of each graph.
1. r=2
2. r=3sec(theta)
3. r=1+sin(theta)
4. r=2cos 3(theta)

2007-08-23 17:43:38 · 2 answers · asked by Anonymous in Mathematics

Please help!

A speedboat begins at the rest and accelerates at +2.01 m/s2 for 6.55 s. At the end of this time, the boat continues for an additional 5.80 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.80 s.

(a) What is the velocity of the boat at t = 21.15 s?

(b) Find the total displacement of the boat.

Thank you so much!!!!!!!!!!!!!!!!!!

i posted this earlier but all the answers i got were wrong. i checked them and the computer tells if your right or wrong but not how to do them or what the right answer is so...
please, PLEASE, help me. i desperately need it.

i sincerly appreciate it!

2007-08-23 17:43:03 · 3 answers · asked by Elizabeth 3 in Physics

Why Would the size of and elephant be expressed in meters but that of a bacterim in microns?

2007-08-23 17:41:59 · 4 answers · asked by Anonymous in Biology

2007-08-23 17:26:08 · 4 answers · asked by fashionistaqt 3 in Biology

2007-08-23 17:21:47 · 5 answers · asked by badpony 1 in Engineering

2007-08-23 17:16:03 · 5 answers · asked by jkgregory10@sbcglobal.net 1 in Chemistry