Science & Mathematics - 21 August 2007

2007-08-21 01:29:52 · 10 answers · asked by shalu 1 in Physics

2007-08-21 01:27:14 · 6 answers · asked by joe M 1 in Weather

like hurricane dean for instance. who choses these names?

2007-08-21 01:12:18 · 18 answers · asked by Janeywaney 4 in Weather

adding and subtracting rational expressions


1.24/7-21/2+11/14

2.7/2-1/6-5/9+7/3

3.3/x+5/2x-11/3x

4.k-4h+2/2k+4k+3h-1/7k


please help!!!!!!!!!math geniusesssssss!!!!!!!1

2007-08-21 01:08:17 · 8 answers · asked by no__one 1 in Mathematics

What exactly is a partial fraction anyway?

What does the term "Partial Fraction Decomposition" mean anyway?

Write the partial fraction decomposition of each rational expression.

(1) 3x/(x + 2)(x - 1)

(2) (x^5 + 1)/(x^6 - x^4)

2007-08-21 01:07:53 · 3 answers · asked by journey 1 in Mathematics

Mark McGuire hit a baseball with an initial speed of 180 feet per second at an angle of 40 degrees to the horizontal. The ball was hit at a height of 3 feet of the ground.

(a) When is the ball at its maximum height? Determine height of the ball.

(b) Determine the distance that the ball travels.

2007-08-21 01:02:52 · 2 answers · asked by journey 1 in Mathematics

specifically i need values for the theoretical complete combustion of kerosene, methylated spirits, parafin wax and eucalyptus wood.

2007-08-21 00:59:55 · 2 answers · asked by Anonymous in Chemistry

If you follow the eye of the hurricane in a car or something does that mean it'll always be sunny and calm since it looks like there is no cloud cover over the eye.

2007-08-21 00:55:03 · 5 answers · asked by Anonymous in Weather

solve 2x+2x-3z=5
4y+3x+5y=4
and
3y+4x+5z=3

pls solve this by gauss jordan and determinant!
pls show ur solutions! tnx in advance!

2007-08-21 00:54:54 · 1 answers · asked by bryan l 1 in Mathematics

Canada? Aren't the Americans friends?

2007-08-21 00:53:22 · 3 answers · asked by Looking ahead 3 in Geography

Many physics are of the opinion that the linear perception of time we have is an illusion. Does this mean the future and the past is here and now?

Does this mean the future is deterministic? Only we cannot see it?

2007-08-21 00:50:36 · 7 answers · asked by bourbon 2 in Physics

This is a question that I've been pondering for years. I was once told that they are there to warn low flying aircraft, but this doesn't really make sense because their use seems so random. Some wires have them, and some don't. Sometimes they appear near airports, and sometimes they don't. So, if your answer is "...to warn low flying aircraft..." I'd appreciate some explanation as to exactly how their use is decided/regulated.

I'd also like to know the technical name for the 'balls,' if there is one, so that I can do research to check the answer myself.

I don't know if this is the right section for a question of this type. I guess I'm hoping that an engineer at a power company will see this and be able to shed a little light on it for me.

Thanks.

2007-08-21 00:44:01 · 4 answers · asked by Harry M 2 in Engineering

How many tonnes of calcium carbonate must be heated to produce 10 tonnes of calcium oxide. Also, how much CO2 will be released. Please tell me exactly how to do the question- I don't just won't the answer.
Thanks

2007-08-21 00:41:12 · 4 answers · asked by checked.cherry 2 in Chemistry

if the expansion of the universe stops. could its contraction lead to an "infinite" amount of energy being condensed in an infinitely confined space leading to another big bang.

if the the universe follows a cycle of expansion and contractions then should one argue that before the big bang there was not time or space ?

2007-08-21 00:37:10 · 11 answers · asked by Anonymous in Astronomy & Space

2007-08-21 00:27:43 · 1 answers · asked by Anonymous in Other - Science