Science & Mathematics - 30 September 2007

So there were at least 2 supercontinents?
Were there more than 2?
Rodinia spread apart?
How did they combine to become Pangaea?

2007-09-30 16:11:36 · 5 answers · asked by Philip Augustus 3 in Earth Sciences & Geology

why does a really dense liquid sink when a less dense liquid float? is it because a dense liquid is heavier/

2007-09-30 16:10:07 · 4 answers · asked by Sarah S 3 in Physics

How do you find the roots for a 4th degree polynomial? (Or even third degree for that matter.) Here's the equation I need to solve:

r^4 - r^2 - 2r + 2 = 0

2007-09-30 16:09:50 · 3 answers · asked by Anonymous in Mathematics

A solution containing 296.6 g of Mg(NO3)2 per liter has a density of 1.114 g/mL. What is the molarity of the solution?

2007-09-30 16:07:57 · 1 answers · asked by Anonymous in Chemistry

It seems like we would be able to move or destroy a large body if we landed several large atomic warheads on a 3 mile wide comet. I think that if we landed them all on one side of the comet and detonated them it should be like squezing a watermellon seed just make sure we do it in the right durection.any way shouldnt this work?

2007-09-30 16:06:28 · 5 answers · asked by chingow 2 in Astronomy & Space

how did animals first develop air breathing lungs?
When the first creatures poped out of the ocean,
How did they start to breath?

2007-09-30 16:05:50 · 2 answers · asked by Philip Augustus 3 in Biology

2007-09-30 16:04:42 · 9 answers · asked by Anonymous in Agriculture

1. S (integral), pie 3.14, I didn't have a pie sign.
The R should be under the SS

S 0 to 2 S 0 to pie/2 x sin y dy dx


2. S 0 to 2 S 0 to 1 (2x + y)^ 8 dx dy


3. SS (6x^2y^3 - 5y^4) dA, R= {(x,y)| 0 <= x <= 3, 0 <=y<=1}
R

4. SS xye^x^2y dA, R= [0,1] x [0,2]
R


5. Find the volume of the solid that lies under the plane 3x + 1y + z= 12 and above the rectangle R= {(x,y) | 0<= x <= 1, -2 <= y<=3}

2007-09-30 16:03:18 · 2 answers · asked by annhall90 1 in Mathematics

please help!

1. the equation of a rectangle is 40 inches. find the dimensions of the rectangle if its area is 84 square inches.

2. find 2 consecutive integers whose product is 528.

PLEASE HELP!
thanks in advance

:]

2007-09-30 16:02:34 · 5 answers · asked by Anonymous in Mathematics

2007-09-30 16:01:23 · 4 answers · asked by me . 2 in Mathematics

what about emeralds too

2007-09-30 16:01:07 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-30 16:00:28 · 4 answers · asked by Anonymous in Chemistry

crap or scientifically possible?

2007-09-30 15:59:31 · 5 answers · asked by Curious 3 in Physics

2007-09-30 15:59:04 · 3 answers · asked by pamy k 1 in Biology

Need the f'(x) of the following equations:

A.f(x)=x^2(x-4)^2

B. f(x)=x^2(x-5)^3

I am trying to use the power rule to do this but I think I am simplifying the original equation wrong or something. Help please.

2007-09-30 15:56:57 · 3 answers · asked by Anonymous in Mathematics

I heard it's a genetic condition.

2007-09-30 15:56:56 · 15 answers · asked by Becca 6 in Medicine

http://www.space.com/scienceastronomy/070424_hab_exoplanet.html

Gliese 581 C is the smallest extrasolar planet, or "exoplanet," discovered to date...

2007-09-30 15:56:16 · 12 answers · asked by walrus 2 in Astronomy & Space

I'm on 25mg of atenelol daily as a headache preventive. Is it okay for me to drink while taking the medicine?

2007-09-30 15:55:22 · 2 answers · asked by love_to_knit! 3 in Medicine

2007-09-30 15:53:49 · 7 answers · asked by Anonymous in Mathematics

1. The number whose digits have a sum of 15 and a difference of 1. This nujber is not less than 95.

2. If you subtract 6 from the ones digit, you get the tens digit. Skip-count by 2 four times to get the ones digit.

3. The number whose ones digit is 8 less than its ten digit. The sum of the digits is a 2-digit number

2007-09-30 15:53:26 · 3 answers · asked by Kim Possible 2 in Mathematics

Please explain it because i have to take a seminar on it.

2007-09-30 15:52:06 · 3 answers · asked by sasi s 1 in Physics

stretching the graph of g(x) vertically by a factor of?

2007-09-30 15:51:39 · 4 answers · asked by zack 1 in Mathematics

please help meeee

2007-09-30 15:48:42 · 8 answers · asked by kkga_1 1 in Other - Science

2007-09-30 15:46:43 · 1 answers · asked by some guy 1 in Chemistry

Suppose that Karen ordered 3 burgers and 5 sodas fo a total of 1841 calories. Jake ordered 5 burgers and 2 sodas for total 1770 calories. How many calories r in the burger??? How many are in the sodas?

2007-09-30 15:46:24 · 5 answers · asked by TriniBeauty. 3 in Mathematics

2007-09-30 15:44:44 · 1 answers · asked by wtfitsnguyen 2 in Physics

2007-09-30 15:44:28 · 3 answers · asked by Random_girl 2 in Mathematics

I don't really understand. Why are their certain lines that show up darker at certain numbers?

2007-09-30 15:43:44 · 4 answers · asked by Anonymous in Astronomy & Space

2007-09-30 15:42:42 · 6 answers · asked by James the Just 3 in Zoology

1. With today's technology, how long time spent the rocket travelling from the earth to the moon, mars, jupiter, and pluto's orbit?
2. When will the NASA's next space travelling to the moon, and mars?

2007-09-30 15:41:48 · 4 answers · asked by Wicax 2 in Astronomy & Space