Science & Mathematics - 27 September 2006

2006-09-27 10:45:54 · 11 answers · asked by josh 1 in Astronomy & Space

2006-09-27 10:45:20 · 6 answers · asked by Pseudo Obscure 6 in Astronomy & Space

2006-09-27 10:45:15 · 5 answers · asked by ruben j 1 in Chemistry

it's not a cell membrane.

2006-09-27 10:44:55 · 5 answers · asked by brunettezrkewl 1 in Biology

2006-09-27 10:43:59 · 3 answers · asked by betyboop48 1 in Biology

Let n belongs to N and given a belongs to Z, let a* represent the congruence class of a modulo n. if a1* = a2* and b1* = b2* for integers a1,a2,b1,b2, then prove that (a1b1)* = (a2b2)*.

if p is a prime, explain why all elements in Z / pZ have multiplicative inverses

I have tried but cant go anywhere with it. need help. thank you.

2006-09-27 10:43:05 · 4 answers · asked by David F 2 in Mathematics

That women find most attractive?

2006-09-27 10:42:46 · 3 answers · asked by Pseudo Obscure 6 in Biology

2006-09-27 10:41:07 · 1 answers · asked by yayo_1988 1 in Physics

You have 10 bags. Each bag has 10 coins. One of the ten bags is full of counterfit coins, but you don't know which bag. Real coins weigh 10 grams and counterfit coins weigh 9 grams. If you can use a scale only one time how can you determine which bag has the counterfit coins? You may only weigh it one time, meaning you can only read the scale once. You can't lift up the bags and feel which is heavier either. There is a logical solution.

First to get it right gets the 10 points!

If you get stumped then just email me and i'll send you the answer.

Have fun!

2006-09-27 10:40:57 · 10 answers · asked by Mariko 4 in Mathematics

I'm having to show specimen to my Biology teacher

2006-09-27 10:38:16 · 3 answers · asked by miss Ann 1 in Biology

Please provide solid references.

2006-09-27 10:37:31 · 4 answers · asked by drjohnson66 1 in Other - Science

2006-09-27 10:37:19 · 11 answers · asked by Anonymous in Mathematics

"What would happen if you went back in time and killed your grandfather before he had kids?"
I've heard this paradox type question in countless movies and SciFi books, and I believe it to be representitive of the entire problem with time travel. But, what if time travel were really possible? What do you think would happen? Would the universe explode simultaneously? Would your family tree (including you) suddenly wink out of existence? Would some divine force (God, Universe, Father Time, ect.) somehow cause your grandfather to duck at the very moment you pulled the trigger? What are your own thoughts?

2006-09-27 10:36:42 · 9 answers · asked by Anonymous in Other - Science

2006-09-27 10:36:40 · 4 answers · asked by JW M 1 in Physics

2006-09-27 10:36:13 · 3 answers · asked by Anonymous in Chemistry

How would an ecosystem change if the trees in a certain area die off because of chemical contamination of the groundwater and suuounding surface water?

2006-09-27 10:34:46 · 4 answers · asked by mskristinah 1 in Earth Sciences & Geology

2006-09-27 10:33:56 · 9 answers · asked by manofsteel_returns 2 in Mathematics

2006-09-27 10:31:46 · 3 answers · asked by Anonymous in Mathematics

2006-09-27 10:26:56 · 14 answers · asked by doorseeker 1 in Astronomy & Space

profit% and discount%

2006-09-27 10:26:41 · 5 answers · asked by Anonymous in Mathematics

Consider a thin circular disk of radius R and mass M. Imbedded in the material of the disk, at a distance r from the center, is a mass m. Imagine that the disk is placed on a ramp inclined at angle THETA from the horizontal. What is the maximum distance, as measured along the ramp, the disk can roll UP the incline under gravity alone? Simplifications:
Consider only a disk allowed to move slowly without slipping.
Consider m>>M.
For definiteness, give the answer for these parameters:
THETA = 30°. R = 7.500, r = 6.800 (Three decimals ought to do it)
The first correct answer gets 10.

2006-09-27 10:26:29 · 3 answers · asked by 1,1,2,3,3,4, 5,5,6,6,6, 8,8,8,10 6 in Physics

What's the science behind it?
How does it help relieve stress?
How do we enjoy music?

2006-09-27 10:25:06 · 5 answers · asked by Anonymous in Biology

the smell of oil of wintergreen (the plant) what would you say it smells like?

2006-09-27 10:23:55 · 4 answers · asked by kp 1 in Botany

Seen in central scotland this summer

2006-09-27 10:23:24 · 19 answers · asked by robben 2 in Zoology

[If it's possible, I need an answer by tomorrow. I'm cursing myself for not bringing home my chemistry book, hehe]

An oxygen ion has a -2 charge -
a. How many protons does the oxygen ion have?
b. How many electrons does the oxygen ion have?

[Oh and it's not needed but if you could explain why that'd help me out for future questions, I swear I don't remember learning how to figure this out!]

2006-09-27 10:23:16 · 7 answers · asked by moonlit skies 2 in Chemistry

this is related to vasoconstriction and vasodialtion of the blood vessels and homeostasis

2006-09-27 10:21:46 · 3 answers · asked by Anonymous in Biology

this is not for school just to let you now and can the awnser be like
ex:6 to the fourth power.

2006-09-27 10:19:28 · 6 answers · asked by Anonymous in Mathematics

2006-09-27 10:17:27 · 4 answers · asked by Anonymous in Other - Science

2006-09-27 10:12:28 · 8 answers · asked by Anonymous in Earth Sciences & Geology

looking to oxidize Am +3 to Am +4 for a little Cm/Am separation

2006-09-27 10:11:44 · 1 answers · asked by Anonymous in Chemistry