Science & Mathematics - 23 September 2007

1. the square root of -42 times the square root of -6
2. the square root of -16/25
3. the square root of -8/3

2007-09-23 11:45:09 · 5 answers · asked by roth 1 in Mathematics

I have an old atlas book that shows the orbits of the planets. The paths seem to come very close together at one point.. how close do the orbits come together?

2007-09-23 11:43:10 · 11 answers · asked by audine 3 in Astronomy & Space

to mow the lawn with the help of two people

2007-09-23 11:42:15 · 10 answers · asked by Anonymous in Mathematics

write the augmented matrix of each system of equations.

{2x - y - z = 0
{x - y + z = 1
{ 3x - y = 2

can you explain in detail how you solve this?

2007-09-23 11:39:58 · 4 answers · asked by w s 3 in Mathematics

2007-09-23 11:31:38 · 3 answers · asked by MoPleasure4U 4 in Physics

I understand that many British song birds live between 18 months and three years. So what happens to them when they die?

2007-09-23 11:26:47 · 13 answers · asked by donjamste 1 in Zoology

NCCH2CH2CO2CH3

and

CH3OCH2CH2NHCH3

What are the functional groups and what should the be labeled? (names)

2007-09-23 11:20:46 · 1 answers · asked by Paulllll C 3 in Chemistry

You know when u type in alt and some numbers you get a symbol usually on the keyboard. for example, alt: 2024 is this Φ. What would the symbol for exponent be? alt: ?

2007-09-23 11:20:39 · 3 answers · asked by Grid 7 in Mathematics

If so, please give me a link. It's for a school project.

2007-09-23 11:18:08 · 1 answers · asked by RayRay 2 in Engineering

identify and describe

2007-09-23 11:17:21 · 5 answers · asked by bookworm 2 in Weather

just curious.

2007-09-23 11:13:05 · 3 answers · asked by Anonymous in Medicine

astrology,science,

2007-09-23 11:10:21 · 7 answers · asked by ~C.b.~ 1 in Astronomy & Space

I have really strange dreams sometimes. Like, one time, I had a dream that my friend came over and we did a bunch of stuff. Then the next day it came exactly true! And I keep having this one dream over and over, for as long as I can remember. In the dream, I'm in a cabin in the woods, and it's at night, its not raining,but it is thundering and lightning. I'm in this same room every time. There are animals all over the walls, like wolf heads, and bear coats or whatever, and every time the lightning flashes, the animals are in my face. It really creeps me out whenever Ihave this dream. does it mean anything?

2007-09-23 11:05:16 · 9 answers · asked by kitkat_868 1 in Paranormal Phenomena

2007-09-23 11:05:03 · 1 answers · asked by Anonymous in Other - Science

I know iodate is an oxyacid...but how am i suppose to know its 3 and not 2

2007-09-23 11:02:31 · 5 answers · asked by yasi 2 in Chemistry

2007-09-23 11:00:48 · 5 answers · asked by xburned_icex 1 in Chemistry

OK, lets see who gets this one~~~~~

What's the density of a block of marble that occupies 382 cm3 and has a mass of 759 g?

Answer in units of g=cm3.

2007-09-23 11:00:41 · 3 answers · asked by Anonymous in Chemistry

I'm totally lost on these problems- please help if you can!!

1. Show that there is some number "c" with 0
2. For what real value(s) of b will the piecewise function g(x)= x, if x<0 and bx^2, if x is greater than or equal to 0
be continuous at every x in R?

2007-09-23 10:59:30 · 1 answers · asked by carbonatedcolor 2 in Mathematics

Vector A has x and y components of -20 cm and 12 cm, respectively; vector B has x and y components of 4.79 cm and -20 cm, respectively.

a - If A-B+3C=0, what is the x component of C? Answer in units of cm.

b - What is the y component of C? Answer in units of cm.


I got Cx to be -15.21cm and Cy as -8...but bringing it back that equation doesnt equal 0..unless I did something wrong.

2007-09-23 10:59:28 · 1 answers · asked by grouchy187 2 in Physics

i need a good interactive website that will show me step by step instructions on how to do problems

2007-09-23 10:56:17 · 2 answers · asked by dw 1 in Mathematics

Needing some more help with Algebra, I'm almost finished.

-^3√64

Note this is a cubed root.

2007-09-23 10:52:54 · 4 answers · asked by Ozzie 3 in Mathematics

Is there a pushing force of gravity?

2007-09-23 10:51:51 · 8 answers · asked by swimafisha 1 in Astronomy & Space

what is the formula for each of the following compounds

1 ammonium hydrogen phosphate

2 bromous acid

3 potassium hydrogen sulfide

4. calcium iodine

5. cesium perchlorate

2007-09-23 10:51:26 · 1 answers · asked by Anonymous in Chemistry

2007-09-23 10:49:20 · 5 answers · asked by Anonymous in Physics

find f o g and g o f and find the domain of each function and each composite function in interval notation

f(x)= absolute value of x, g(x) = 2x^3

f(x) = 1/x, g(x) = x + 3

f(x) = 3/x^2-1 ,g(x) = x + 1

2007-09-23 10:48:39 · 1 answers · asked by mike p 2 in Mathematics

I'm trying to get a mental picture of these quantum numbers in a multielectron atom

Can someone tell me if this is correct ...this is what I imagine now ...but I don't know if it's right

_______________________________________________

above the nucleus ..there's shells determined by the principle quantum # n that extend to infinity

Then within each of these shells ...(I picture them as a transparent sphere ...but that's probably wrong) there's X number of electrons ....some have the same angular momentum going really fast, some are going slower around this shell ....

The ones with the same velocity are traveling around the same circumference of the shell .....and the ones with different angular momentum l numbers are going on a slightly different circumference so it looks like a cloud ...and then there's a max of 2 electrons who can have the same angular momentum in this shell ....
????

2007-09-23 10:42:34 · 1 answers · asked by Anonymous in Chemistry

I am given an angle of a triangle. The angle is 32º 42'. What does the 42' mean?

2007-09-23 10:41:17 · 14 answers · asked by <('_')> 4 in Mathematics

2007-09-23 10:38:59 · 6 answers · asked by Anonymous in Weather

i just started about 3 days ago, three new medicines my doctor put me on for PCOS. he said one of them would cause diarehha while i was getting used to it, but although i have gotten diahreaa, i feel nausous, blurred vision,very weak and like im getting the flu. should i just continue to give the meds a chance to work? stop taking them? go to the emergancy room? i felt fine and normal till i started these medicines. they are yasmin(birth control) metphormine, trazadone, in combination with my multi vitamins, and b-12 pills. any advice is appriciated.

2007-09-23 10:34:32 · 8 answers · asked by cashew 3 in Medicine

is it a type of gas medicine?

2007-09-23 10:34:02 · 4 answers · asked by kendra 1 in Medicine