Science & Mathematics - 24 October 2007

what do you think about animal testing? is it abusive? or os it very useful for humankind? anybody agree or disagree of this idea?

2007-10-24 05:14:42 · 12 answers · asked by Berry Bleo 2 in Zoology

A map of the gravitational anomalies of the moon looks sorta cool on the Near Side, but the Far Side is creepy. Perhaps time has eroded what was once giant letters spelling out a message ... like "You Are Not Alone" or "Where's the Beef?"

http://en.wikipedia.org/wiki/Image:MoonLP150Q_grav_150_j2.jpg

2007-10-24 05:13:51 · 9 answers · asked by Faesson 7 in Astronomy & Space

rigby88
Your Open Question
Show me another »
Plasma Donation?
I'm donating plasma tomorrow at 1145am and am a little worried. My family has told me not to do it. My aunt and uncle think that it will lower my immunity. Is there any real hazard to my health? Other ppl I've talked to tell me they've done it and have had no problem. Anyone know anything about this kind of stuff?

also, is it painful?

2007-10-24 05:13:48 · 5 answers · asked by Anonymous in Medicine

A thin uniform wire has length 30cm is bent to form a framework in the shape of a right angled triangle PQR where PQ=5cm, QR =12cm and RP =13cm.
Find the distance of the center of mass of the framework from:
a)PQ
b)QR
The framework is freely suspended from the point P and hangs in equilimbrim.
c)find the acute angle that PQ makes with the vertical

Couild you please show your working out so that i can understand how you got your answer, thanks

2007-10-24 05:12:56 · 3 answers · asked by Ryujin 3 in Mathematics

Such as a pack of wolves - hwat is the dominant female called?

2007-10-24 05:10:56 · 12 answers · asked by purple dove 5 in Zoology

DO YOU THINK THAT WE WILL END OUR EXISTANCE OR NATURE WILL. DO TO OUR KNOWLEGE OF NUCLEARE
WEAPONS, AND OUR POLUTING OF THIS PLANET. OR
DO TO OUTER SPACE OBJECTS THAT COULD SMASH OUR PLANET INTO PEICES. WHICH ONE DO YOU THINK WILL END US FIRST.

2007-10-24 05:06:32 · 7 answers · asked by Aaron H 1 in Astronomy & Space

2007-10-24 05:05:46 · 6 answers · asked by mangal 4 in Engineering

I usually screw up this type of question so plz check - thx.

sin(x+y) + cos(x-y) =1. What is dy/dx?

sin(x)cos(y) + cos(x)sin(y) + cos(x)cos(y) + sin(x)sin(y) = 1

cos(x)cos(y) - sin(x)sin(y)(dy/dx) - sin(x)sin(y) + cos(x)cos(y)(dy/dx) - sin(x)cos(y) - cos(x)sin(y)(dy/dx) + cos(x)sin(y) + sin(x)cos(y)(dy/dx) = 0

(dy/dx)(cos(x)cos(y) + sin(x)cos(y) - sin(x)sin(y) - cos(x)sin(y)) = sin(x)sin(y) + sin(x)cos(y) - cos(x)cos(y) - cos(x)sin(y)

dy/dx = [sin(x)sin(y) + sin(x)cos(y) - cos(x)cos(y) - cos(x)sin(y)] / [cos(x)cos(y) + sin(x)cos(y) - sin(x)sin(y) - cos(x)sin(y)]

dy/dx = [sin(x-y) - cos(x+y)] / [sin(x-y) + cos (x+y)]

2007-10-24 05:04:30 · 3 answers · asked by ndavos 2 in Mathematics

At a specific set of conditions, 246.6 kJ is given off when 1 mol H2O(g) forms from its elements. Under the same conditions, 283.6 kJ is given off when 1 mol H2O(l) forms from its elements. Calculate the heat of vaporization of water at these conditions.
kJ

2007-10-24 04:58:07 · 2 answers · asked by Dumb B 1 in Chemistry

do we always see one side of the moon from Earth?
it doesn`t twirl ?? :0

2007-10-24 04:53:36 · 7 answers · asked by farzane l 2 in Astronomy & Space

I can understand the standard tape1/16,1/8, even the 32, but confused about the metric is there a simple way to learn

2007-10-24 04:49:13 · 2 answers · asked by tania 1 in Mathematics

Square root of (25x^2 + 5x +16) -5x +16

2007-10-24 04:47:28 · 4 answers · asked by Anonymous in Mathematics

2007-10-24 04:46:54 · 22 answers · asked by Anonymous in Astronomy & Space

Is it a design flaw, bad materials, or what?

It's embarrassing, and dangerous!

Thanks.

2007-10-24 04:40:38 · 10 answers · asked by American citizen and taxpayer 7 in Astronomy & Space

that can be used to find the approximate rate of change.

dy/ dx = (y1 - yo)/ h
or dy/dx = (yn+1 - yn-1) / 2h

Is there one that is better than the other?
Why is one preferable over the other? and which one is better to use?

2007-10-24 04:39:04 · 2 answers · asked by Anonymous in Mathematics

2007-10-24 04:35:48 · 8 answers · asked by lj11160 1 in Other - Science

away and hence represents events of past. is it possible to
"see" ourselves several million light years away ?if so how do we prove it is "we"

2007-10-24 04:32:03 · 5 answers · asked by Anonymous in Astronomy & Space

Ray SU bisects angle RST. The measure of angle RSU=3x-1, the measure of angle UST=2x+13 and the measure of angle RST=6x-2. Find x.

heres the picture:
http://i20.tinypic.com/2a8421x.jpg

choices
12
14
41
82

and then there's a second question that goes along with the same diagram

Use the information from the previous question to find the measure of angle RSU.

12
14
41
82

thank you sooooooo much to anyone that can help.

2007-10-24 04:28:18 · 4 answers · asked by Anonymous in Mathematics

i'm not near a clock and the comp i'm using doesnt have one.

2007-10-24 04:21:23 · 7 answers · asked by Anonymous in Other - Science

I need to know the steps. I think I am doing it right, but I keep getting the answer wrong. Here's the question...

Objects with masses of 300 kg and a 600 kg are separated by 0.450 m.
(a) Find the net gravitational force exerted by these objects on a 69.0 kg object placed midway between them.

I am using the equation F=Gm1m2/d2, using it for the first object, then subtracting the second object and totally getting the wrong answer. Any help?

2007-10-24 04:19:49 · 3 answers · asked by n'cole 2 in Physics

2007-10-24 04:13:48 · 3 answers · asked by Marcela R 1 in Astronomy & Space

a. niche b.always forest c. climax community. d.one that can never change

2007-10-24 04:12:14 · 3 answers · asked by Harley 1 in Biology

I mean how do we know since we do not have a fix point in our solar system.

2007-10-24 04:11:00 · 9 answers · asked by yahooanswers 3 in Astronomy & Space

of proofs; in Geometry I, mean. I hated those things; it's not that they were difficult; I was just unable to see what I would do with those things in the real world.

2007-10-24 04:09:58 · 13 answers · asked by Usagi's Twin; HAJI IS MINE! 4 in Mathematics

If you plot Y=X on a graph, how is it that you get the axis of symmetry?

2007-10-24 04:08:50 · 4 answers · asked by whisky 3 in Mathematics

i need to know for a report and i cant find anything in the search engines so i was wondering if anybody could help me??plzzz

2007-10-24 04:03:15 · 3 answers · asked by Anonymous in Weather

2007-10-24 03:51:11 · 15 answers · asked by Anonymous in Zoology

2007-10-24 03:45:11 · 9 answers · asked by sassy 1 in Other - Alternative

2007-10-24 03:41:55 · 3 answers · asked by Math_question 2 in Mathematics

Preferably through contradiction. So far, I have:

Assume the square root of some prime p is rational

Therefore, square root of p can be represented by the division of two non-canceling integers, a and b.

If we square both sides, we get p is equal to a squared over b squared.

....

Where do I go from here?

2007-10-24 03:40:51 · 4 answers · asked by will j 1 in Mathematics