Science & Mathematics - 4 February 2007

2007-02-04 11:51:22 · 10 answers · asked by Anonymous in Weather

im a freshman i have been challenged to build a model of a atom i chose hydrogen how many electrons does an hydrogen atom have i fiqured one but i wasent quite sure i wanted to make sure and how many protons and nuetrons are in a hydrogen atom i left my book at home and i cant recall how to tell by using the atomic number i think it was thanks

2007-02-04 11:51:14 · 3 answers · asked by livindead91 2 in Chemistry

I am doing a project for school and i need to know this. Please help!!!!!!!!!!

2007-02-04 11:50:15 · 6 answers · asked by Sam 1 in Astronomy & Space

2007-02-04 11:50:02 · 9 answers · asked by Anonymous in Mathematics

why do people when talking about panama, el salvdor belize honduras etc. call it central america when its actually in north america and why isnt greenland considered part of north america
when you look up info on north america they only list 3 countries canada usa and mexico

2007-02-04 11:49:59 · 8 answers · asked by Andreu 2 in Geography

2007-02-04 11:48:14 · 3 answers · asked by cead 3 in Zoology

Cause they're from differant schools... is it the same thing?

2007-02-04 11:47:52 · 1 answers · asked by Dan 2 in Physics

any medicine

2007-02-04 11:45:43 · 4 answers · asked by Frank W 1 in Medicine

2007-02-04 11:44:11 · 1 answers · asked by symia87 1 in Chemistry

I am a competition rifle shooter, and I want to practice my shooting positions and aiming with my new rifle at home. And I have some new sights that I need to adjust to get the right size for the targets I shoot. The problem is that I don't have 50ft straight room in my house or backyard, so I was going to scale it down but I'm not sure I know exactly how.

A few details: the target is 1.5" in diameter and I shoot it at 50ft. And want to have the scaled down range 10ft. So to find the size of the target I will have to make a proportion, is this right...

50/10 = 1.5/x

2007-02-04 11:44:04 · 4 answers · asked by Anonymous in Mathematics

Crossword puzzle - has 9 letters

2007-02-04 11:43:56 · 3 answers · asked by Anonymous in Biology

could someone please explain this to me im failing math and i really need help i do not want you to leave a answer without explaining please help me

2007-02-04 11:42:37 · 7 answers · asked by chrischick2438 1 in Mathematics

on has occured.

2007-02-04 11:42:20 · 1 answers · asked by astrorocket 2 in Biology

2007-02-04 11:42:19 · 2 answers · asked by ellen s 1 in Geography

2007-02-04 11:41:15 · 11 answers · asked by Adina 2 in Geography

2007-02-04 11:40:38 · 5 answers · asked by Jason 2 in Astronomy & Space

outside the square root bar there is a 2 and inside the bar say
9 + 7 + 1 to the 4th power how would I solve this problem

2007-02-04 11:40:15 · 5 answers · asked by Wendy C 1 in Mathematics

i got that by sqring both sides to get
x+11=x+1
11=1
but i feel like that is wrong?

2007-02-04 11:40:03 · 4 answers · asked by Anonymous in Mathematics

I left it out over night not knowing it had to be refridgerated? Is it still ok to use?

2007-02-04 11:38:51 · 7 answers · asked by peterpan123 3 in Medicine

which tissues are likely to suffer the most irreversible damage?

2007-02-04 11:37:55 · 3 answers · asked by mzkme 1 in Biology

Like if you take a magnetic from the refidgerator and you, kinda let it sit on a cd. Or any other way of a magnetic being close to a cd

2007-02-04 11:36:26 · 6 answers · asked by vegeta_4121 2 in Engineering

Ok if you can solve this problem for me and answer it. Also can you explain how you got the answer.

2007-02-04 11:33:38 · 10 answers · asked by fdafdsa 2 in Mathematics

2007-02-04 11:33:12 · 5 answers · asked by Anonymous in Zoology

Please explain as much as possible. I am very confused.

2007-02-04 11:31:49 · 4 answers · asked by laquay723 1 in Physics

2007-02-04 11:28:15 · 7 answers · asked by Karen W 1 in Weather

2007-02-04 11:28:04 · 4 answers · asked by bouch- 1 in Mathematics

Hi everyone, ive trieeddd sooo many times to get these and I do not know what I am doing wrong. Please help!

1. integral 1 / (( 9 + x^2)^(3/2)) dx by letting x = 3tan(t)
solve for intregal of dt vaues

so the answers is integral ___ dt


2. integrate 1 / ((16-x^2)^(3/2)) dx by letting x = 4sin(t)
(integrate fully)

3. integrate 1 / ((x^2)((sqrt(25 + x^2))) dx by letter x = 5tan(t)

4. integrate 1 / (sqrt(8 + 2x - x^2)) dx

5.integrate from x=4 to x=0 1 / (sqrt(324+x^2)) dx

6. integrate from x=5(sqrt(2))/2 to x=0 (sqrt(25-(x^2))) dx

7. integrate 1 / (x^2)(sqrt(144-x^2)) dx

8. integrate (sqrt(16x-x^2)) dx

9. integrate 44 / (sqrt(40 - 6x - x^2)) dx

2007-02-04 11:26:48 · 2 answers · asked by Anonymous in Mathematics

Its my science word! i need help plezz.....!

2007-02-04 11:25:27 · 2 answers · asked by Grandma Elliot 1 in Earth Sciences & Geology

not sure how to do this one.
thanks for help

2x^4=16x

2007-02-04 11:25:10 · 5 answers · asked by lonergirl 1 in Mathematics

2007-02-04 11:22:47 · 7 answers · asked by Anonymous in Mathematics