Science & Mathematics - 21 January 2007

2007-01-21 14:21:16 · 2 answers · asked by john m 1 in Chemistry

2007-01-21 14:20:47 · 7 answers · asked by heather g 1 in Astronomy & Space

someone told me that you can still be pregnant even though your on your period. How could that be...do you know?? Please send my some LINKS and post some answers for me.

Thank you

2007-01-21 14:20:39 · 2 answers · asked by smile 2 in Biology

2007-01-21 14:19:26 · 3 answers · asked by john m 1 in Mathematics

I'm doing a power point for my 6 grd. class and I was just wondering because I can't find anything on google or yahoo, some sites say they are some say they aren't, plz help :-)

2007-01-21 14:18:57 · 1 answers · asked by trinisam 5 in Zoology

5. U r standing perfectly still & then u take a step forward. Before the step your momentum was 0, but aftereward u have some momentum. Is the conservation of momentum violated in this case? (what is the conservation of momentum?)

12. U r watching a movie about a superhero & notice that the superhero hovers in the air & throws a piano at some bad guys while remaining stationary in the air. What's wrong with this scenario? (I rlly don't know).

13. In golf, novice players are often advised to be sure to "follow through" w/ their swing. Why does this make the ball travel a longer distance if a shot is taken near the green, little follow-through is required. Y? (Again, I need help ppl).

15. A sharpshooter fires a rifle while standing w/ the butt of the gun against his shoulder. if the forward momentum of a bullet is the same as the backgward momentum of the gun, y isn't it as dangerous to be hit by the gun as by the bullet?

2007-01-21 14:17:27 · 5 answers · asked by Twilight Is Love 1 in Physics

2007-01-21 14:16:28 · 5 answers · asked by Anonymous in Medicine

This is for my geometry/trig stuff

2007-01-21 14:15:38 · 17 answers · asked by porscheleenj 2 in Mathematics

please help

2007-01-21 14:15:34 · 4 answers · asked by rabbityfeet 1 in Chemistry

lol, it kinda slipped my mind to what density was.

2007-01-21 14:13:16 · 6 answers · asked by Hehe. ;]] 3 in Physics

2007-01-21 14:11:57 · 8 answers · asked by peekabooh 2 in Mathematics

a parent has 10 chromosomes before dividng - how many chromosomes will each new cell have after the parent cell divides?

2007-01-21 14:11:07 · 5 answers · asked by l l 3 in Biology

2007-01-21 14:10:30 · 5 answers · asked by regboi45 2 in Zoology

2007-01-21 14:09:38 · 5 answers · asked by sara 1 in Physics

In most of these "big rock coming to earth" movies they just nuke it or something like that. In real life what would be the actual solution or do we just hope for the best?

2007-01-21 14:09:19 · 19 answers · asked by Anonymous in Astronomy & Space

2007-01-21 14:09:08 · 4 answers · asked by Clart L 2 in Medicine

A right circular culinder is inscribed in a cone with height H and base radius r. Find the largest possible volume of such a cylinder

2007-01-21 14:08:47 · 1 answers · asked by gillgill2003 1 in Mathematics

It is similar to a monopoly board--that is it is segmented into 8 sections along each side and 4 corner squares. How can I figure out what dimensions each of the corner sqaures must be to fit neatly with the uniform rectangles making up the 8 sections on each side? For instance, If I make the rectangle sections 2 inches wide by 3 inches tall, what will be the dimensions of each of the corners sections? I'm not interested in the answer. I want to know what formula/algorythm to use, given any dimensions of one of the 8 rectangle sections. Thanks.

2007-01-21 14:06:50 · 3 answers · asked by vinny_the_hack 5 in Mathematics

Why would one want to use a pulley that had a small mechanical advantage?

2007-01-21 14:06:42 · 6 answers · asked by shelbysurfer 1 in Physics

?

2007-01-21 14:06:23 · 9 answers · asked by Anonymous in Astronomy & Space

actually marine.:
a. green algae
b. brown algae
c. kelps
d. red algae
e. coralline red algae

2007-01-21 14:06:07 · 1 answers · asked by Anonymous in Biology

im supposed to cut my hair that day...

2007-01-21 14:05:26 · 5 answers · asked by Jessie 1 in Astronomy & Space

Some articles listed the estimated age of the sun and planets surrounding it.

I am just wondering, what technology do they use to do that calculations? Is it Gamma rays or I don't know, some other technology?

2007-01-21 14:01:58 · 14 answers · asked by wraithrune 2 in Astronomy & Space

a 100-watt light bulb is left on for 14hours. how many joules of energy are used? with electricity at $0.09 per kwh, how much does it cost to leave the light on for 14 h?

2007-01-21 14:01:23 · 3 answers · asked by Christie 1 in Chemistry

2007-01-21 14:00:27 · 4 answers · asked by Anonymous in Biology

2-butene
1-butene
2-methyl-2-butene
3-hexene

also, how can i draw the structural formulas?

2007-01-21 13:59:06 · 2 answers · asked by Ciavana 3 in Chemistry

2007-01-21 13:58:12 · 4 answers · asked by curly fries 1 in Chemistry

2 K + Cl2 ===> 2 KCl

from 1.00g of Cl2 and excess K?
how do you solve this equation?

2007-01-21 13:56:37 · 2 answers · asked by J.r. 3 in Chemistry

There are 9 stages..im looking for the 1st one...

2007-01-21 13:56:23 · 6 answers · asked by stylish girl 1 in Biology

im taking my first today and im wondering if anyone else has....did it work? any side effects etc?

2007-01-21 13:56:13 · 2 answers · asked by karla 2 in Medicine