Science & Mathematics - 9 October 2006

how would you subtract 7/15 - 4/45??

2006-10-09 13:10:07 · 10 answers · asked by britiani j 1 in Mathematics

a. 1/9
b. -1/9
c. -11/9
d. -11k/9

2006-10-09 13:09:39 · 10 answers · asked by Jmeシ 1 in Mathematics

velocity.

2006-10-09 13:08:08 · 5 answers · asked by lgenes_esc5161 1 in Physics

2006-10-09 13:07:32 · 4 answers · asked by britiani j 1 in Mathematics

2006-10-09 13:07:15 · 2 answers · asked by Anonymous in Earth Sciences & Geology

there is no right answer i just want to know from other people.

2006-10-09 13:04:25 · 22 answers · asked by *baby ducky* 1 in Mathematics

Can I isolate the bacteria in a petri dish or a test tube? or is there some other method?

2006-10-09 13:02:54 · 4 answers · asked by si1enc3d 2 in Biology

Hi, I need to draw a venn diagram for linear and non linear motion. Basically putting the differences on the end part of the circle and the similarities in the middle. It's for my 9th grade physics class

2006-10-09 13:01:39 · 2 answers · asked by Anonymous in Physics

on my homework i have a ?: it has to be a mathmatical term

a couple who goes bowling- _ _ _ _ _ _ _ _ _

please help!!! it's due tomorrowe!!!

the person who gets it rite will get 10 points!!!!

2006-10-09 13:00:30 · 7 answers · asked by ☆♥~chickgirl~♥☆ 3 in Mathematics

2006-10-09 13:00:02 · 11 answers · asked by Eric P 2 in Physics

x-4y=2
2x-8y=5
does this system have one solution or no solution

x-4y=2
x+4y=2
one solution or no solution

HELP!!! I'm confused

2006-10-09 12:59:02 · 7 answers · asked by Mia16 3 in Mathematics

2006-10-09 12:58:14 · 6 answers · asked by bobross509 1 in Botany

2006-10-09 12:56:54 · 3 answers · asked by Anonymous in Mathematics

please hellp me on this, i'd really appreciate it if you would at least give it a try!
2(x+3)+3(x+4)=73/
solve for x

2006-10-09 12:56:15 · 22 answers · asked by Anonymous in Mathematics

I think that Dodecahedrane and Buckminster Fullerene are among some of the most exotic and interesting.

Pictures here:
http://images.google.com/images?q=dodecahedrane&hl=en
for Dodecahedrane

Buckminster Fullerene here:
http://images.google.com/images?svnum=10&hl=en&lr=&safe=active&q=buckminster+fullerene

Churchane is pretty interesting too, just one picture :(
http://images.google.com/images?svnum=10&hl=en&lr=&safe=active&q=churchane

Thanks!

2006-10-09 12:56:13 · 5 answers · asked by Anonymous in Chemistry

An aluminum conductor (resistance 50 ohms, mass 15g, specific heat capacity 0.215) in plced in liquid N2 (-195.8C). How much N2 will evaporate while the resistor cools from 20 deg C to the N2 temp?? The conductor is not connected to a power source and the container is NOT insulated. (This is an ALGEBRA based physics question).
So far I have tried: deltaQ=mass x sp. heat of aluminum x deltaT
AND deltaQ=the latent heat of vaporization of N2 (47.8) x delta mass.

Sadly (and not surprisingly for me...neither works out).

Any help would be greatly appreciated.

2006-10-09 12:53:06 · 4 answers · asked by BugGurl 3 in Physics

For the life of me I can't remember how to do this kind of problem. I know it's really basic, I just can't remember the formula.

This isn't the homework problem, this is a generic version - I need the formulas.

Given a sample of mean u, variance o^2 and sample size n, what is the probability that | u - X | <= d.

I know the formula is P( |N(0,o^2/n)| <= d) = p, but I don't really know how to solve that. I don't really even know what it means, actually.

I also need to know how to work backwards with p given and finding d.

Once again to point out, this ISN'T the actual homework problem, so a complete answer would be nice.

2006-10-09 12:52:34 · 2 answers · asked by Anonymous 3 in Mathematics

2006-10-09 12:51:50 · 4 answers · asked by juju6479 1 in Botany

2006-10-09 12:48:43 · 4 answers · asked by jp 1 in Geography

2006-10-09 12:48:24 · 3 answers · asked by Emily 2 in Chemistry

A 8.50 kg block (m1) and a 7.55 kg block (m2) rest on a horizontal frictionless surface with m2 resting on top of m1. The surface between the top and bottom blocks is roughened so that there is no slipping between the two blocks. A 42.6 N force is applied to the bottom block.

I determined the accelertation of the two block system to be 2.65 m/s^2, but help on how to solve these questions would be appreciated:

What is the force of static friction between the top and bottom blocks? (Friction is supplying the net force on the top block.)

What is the minimum coefficient of static friction necessary to keep the top block from slipping on the bottom block? (The frictional force is a function of the weight of the top block)

2006-10-09 12:46:16 · 2 answers · asked by justinegunderson 1 in Physics

2006-10-09 12:45:55 · 8 answers · asked by miguel j 2 in Mathematics

I know a certain animal exists like this, but I need to find the exact animal. I'm not talking about the scientific name or anything, but at first I thought it was a sea cucumber, but then researched and found sea cucumbers have no brains...*grins* But I THINK it's a sea animal. So, can anyone help me out?

2006-10-09 12:45:09 · 5 answers · asked by Puddles 2 in Zoology

2006-10-09 12:44:34 · 6 answers · asked by bunches999 4 in Biology

2006-10-09 12:43:13 · 4 answers · asked by bunches999 4 in Mathematics

2006-10-09 12:41:52 · 8 answers · asked by mari 1 in Other - Science

2006-10-09 12:39:05 · 5 answers · asked by Anonymous in Mathematics

......is stronger than a double bond between two oxygen atoms

2006-10-09 12:39:04 · 3 answers · asked by Emily 2 in Chemistry

2006-10-09 12:37:52 · 6 answers · asked by Eric K 2 in Geography

2006-10-09 12:34:59 · 3 answers · asked by sunnyfrogmom 1 in Other - Science