Science & Mathematics - 17 September 2007

If aluminum sulfide reacts with water, it's products are aluminum hydroxide and hydrogen sulfide:

Al2S3 + H2O --> Al(OH)3 + H2S

Please balance this equation!!!

2007-09-17 11:08:01 · 2 answers · asked by ^_^ 2 in Chemistry

a polar compound, or a non-polar compound.


I say polar, because they can form hydrogen or dipole dipole bonds. Am I right?

2007-09-17 11:07:33 · 2 answers · asked by Anonymous in Chemistry

A box is given a push so that it slides across the floor. How far will it goi, given that the coefficient of kinetic friction is .20 and the push imparts an inital speed of 4m/s ?

thanks for the help

2007-09-17 11:04:18 · 1 answers · asked by Krazyk78 1 in Physics

Explain please. I need help. Any help is greatly appreciated.

2007-09-17 11:02:57 · 6 answers · asked by mz. * 1 in Biology

again???

2007-09-17 11:02:04 · 3 answers · asked by Anonymous in Physics

you would answer math ?'s then at the end you would race another car and if you got enough ?'s write i think your car would beat the other one. I believe the game was in black and white. I believe the game was a 4th or 5th grade game. in the mid 90's (if you were 19-22 you might remember this game)

2007-09-17 11:01:52 · 4 answers · asked by Anonymous in Mathematics

A balloon is rising at 10 m/s when its passenger throws a ball straight up at 12 m/s.how much later does the passenger catch the ball?

2007-09-17 10:58:02 · 1 answers · asked by M R 1 in Physics

I think a green star or purple star would look awesome, a green or purple sun set on a alien world would definately be a weird thing to see.

2007-09-17 10:56:10 · 10 answers · asked by Anonymous in Astronomy & Space

How come we don't just fly out, i mean were spinning close to the galactic edge, doesn't a galaxy lose entire solar systems over time?

2007-09-17 10:52:32 · 7 answers · asked by Anonymous in Astronomy & Space

and elasctically bounced upward from concrete sidewalk.

What is velocity of the ball 1/4 second after the bounce?

g = 10m/s2

2007-09-17 10:52:12 · 2 answers · asked by Alexander 6 in Physics

* blank Blank*

2007-09-17 10:49:13 · 4 answers · asked by Anonymous in Weather

explain how you got this answer please

2007-09-17 10:48:43 · 7 answers · asked by hellokittycutie1199 2 in Mathematics

A SCHOOL`S GYM LOCKERS ARE NUMBERED FROM 1 TO 125. hOW MANY LOCKER NUMBERS CONTAIN THE NUMBER 4?

2007-09-17 10:48:18 · 36 answers · asked by Carole C 1 in Mathematics

you know those stick bugs that blend in with there enviorments..well this bug is kinda like that but its pink with some purples on it top side. it has 6 legs, pinchers on its rear end, and two very short attenas on its very small head. on its under belly its a tan color. the whole bug is about 2.5 inches in length plz help me ive never seen this kind of bug before, jsut moved to colorado and found it is on my patio wall. thanks

2007-09-17 10:45:55 · 3 answers · asked by SoCaLiBoY1313 2 in Zoology

please ansewer quick1!!!

2007-09-17 10:45:48 · 7 answers · asked by Anonymous in Physics

2007-09-17 10:44:35 · 4 answers · asked by Anonymous in Astronomy & Space

2007-09-17 10:44:34 · 3 answers · asked by Anonymous in Weather

2007-09-17 10:42:59 · 3 answers · asked by Anonymous in Weather

Please help!! I am being overrun with crickets in my house. I have thought about creating a cricket cemetary I have bumped off so many. It seems that as fast as I hit them with a shoe, 15 of their relatives come to eat the body. How do I keep them out of my house, they are keeping me awake at night

2007-09-17 10:42:30 · 1 answers · asked by psstoffagain 5 in Zoology

I have a science question that I'm stuck on, and it's something along the lines of this: Beech Trees have small green flowers. Explain why insects would not be the main source of pollination for Beech Trees. What is a more likely method of pollination?
Any info would be great, thanks!

2007-09-17 10:41:27 · 2 answers · asked by ? 3 in Botany

I'm not looking for the answer to this so much as looking for what I need to do to get the answer. So please explain to me how I go about it. Thanks!

Part 1

A particle has initial horizontal Velocity of 2.9 m/s and initial upwards velocity of 4.9 m/s. It then has a horizontal acceleration of 1.5 m/s^2 and downward acceleration of 2.1m/s^2. What is the speed after 1.8 s? Answer in m/s.

Part 2

What is the direction of its velocity at this time with respect to the horizontal? Answer between -180 and +180 degrees

2007-09-17 10:41:27 · 5 answers · asked by BossGoomba 1 in Physics

2007-09-17 10:41:15 · 8 answers · asked by Anonymous in Astronomy & Space

My new math teacher this year is horrible at explaining things and i learned how to solve equations algebraically last year and now she just toally confused me. If someone can tell me step by step what to do for example with this equation


3x+y=16
2x+y=11

Or this one i'm confused by..

x+2y=8
x-2y=4


If someone can just tell me what your supposed to do step by step so i understand that would be great.

2007-09-17 10:37:15 · 11 answers · asked by looo 1 in Mathematics

How did electricity effect the world?
What is your opinion on the question?

2007-09-17 10:36:16 · 2 answers · asked by HTHstudent 1 in Other - Science

Like a + And a - On a () corse, what does that mean is my question?

2007-09-17 10:36:01 · 1 answers · asked by swimafisha 1 in Astronomy & Space

I know stupid question but please help!!!

2007-09-17 10:33:47 · 10 answers · asked by PrincessPj 2 in Mathematics

a ball is projected off a 100m high cliff at a horizontal speed of 10 m/s.

a) calc. how long the ball takes to hit the sea.
b) calc. horizontal displacement of the ball.
c) calc. the vertical velocity of the ball as it hits the sea.
d) calc. the velocity of the ball as it hits the sea.

2- an archer fires an arrow at a 60m distant target, the arrow leaves the bow at 28m/s at an angle of 25 degrees above the horizontal.

a) what is the horizontal component of the velocity?
b)how long does the arrow take to reach the target ( hits the bulls eye)
c)what is the velocity of the arrow as it hits the target?


3- a golf ball is hit at a velocity of 30m/s at an angle of 30 degrees above the horizontal.

a)calc. max. height of ball
b)the horizontal dist. of the ball.


please help, and please show working

please at least help me do one of these, or show how to do them, like formulae nd stuff,
thanks a lot for any help :) :) +++best answers

2007-09-17 10:32:53 · 1 answers · asked by Anonymous in Physics

2007-09-17 10:31:48 · 7 answers · asked by Anonymous in Mathematics

and if yes should she have her ovaries removed as to not be able to procreate

2007-09-17 10:31:43 · 7 answers · asked by Anonymous in Zoology

2007-09-17 10:29:55 · 2 answers · asked by Anonymous in Zoology