Science & Mathematics - 30 December 2007

how did the earth come to have a surface of about 78% water?

i know a couple of theories on it, but i want to know all of them.

what have you read (where, a link please?) about how earth became the water planet?

2007-12-30 18:51:54 · 3 answers · asked by Louiegirl_Chicago 5 in Earth Sciences & Geology

I want to know about heat capacity!!!

2007-12-30 18:34:28 · 6 answers · asked by lafae 2 in Physics

How can 200 year old rocks be formed on top of 100 year old ones.. like if for example, that type of situation was found... how could that have happened?

2007-12-30 18:24:52 · 5 answers · asked by Anonymous in Earth Sciences & Geology

What sense does the big bang theory make? The universe started off as something as small as an atom. Ok, where did that come from? Where did this atom come from? Where did god come from? I know its a loaded question but, the universe started off as a little atom and blew up. Okay that tells me nothing. Thats like taking a big problem and making it bigger and calling it a theory. How do scientists get away with that? Why can't they just say, "we don't know." ?? Can anyone elaborate non-stupidly on this subject?

2007-12-30 18:13:40 · 18 answers · asked by Living In Fast Forward 4 in Astronomy & Space

simplify 2008 + 2007

2007-12-30 18:13:07 · 7 answers · asked by kevin jonas 2 in Mathematics

If I get one wrong can you tell me the right answer and maybe the steps you took to get there, thank you.

GIVE EACH ABSOLUTE VALUE

i= imaginary number
I...I absolute value brackets

1.
I 8 - 6i I
A: square root of 28

2.
I -1 I
A: 1

3. I -12 + 22.5i I
A: square root of 362.25

4.
I 19i I
A: 19

ADD EACH PAIR OF COMPLEX NUMBERS

5. ( 2 + i ) + (-3 + 2i)
A: -1 + 3i

6.
( -5 + 4i ) + 3
A: -2 + 4i

7.
( 6 - 3i ) + ( -4 - 2i )
A: 2 + 5i

GIVE EACH ABSOLUTE VALUE

8.
I 15 + 7i I
A: square root of 274

9.
I -2 - 6i I
A: 2i times the square root of 10

10.
I square root of 8 - i times the square root of 4 I
A: Can you show me the steps on how you got this one, thx

11.
I 0.2 + 0.8i I
A: square root of .68

12.
I -14 I
A: 14

13.
I -3.6i I
A: 3.6

14.
I 20 + 21i I
A: 29

15. I -30 - 5.5i I
A: 30.5

ADD EACH PAIR OF COMPLEX NUMBERS

16.
( 3i ) + ( 8 )
A: 3i + 8

17.
( -4 - 3i ) + ( 2 - 2i )
A: -2 - 5i

18.
( 3 + 3i ) + ( 3 - 3i)
A: 6

19.
( 2 + 3i ) + ( 3 + 2i )
A: 5 + 5i

2007-12-30 18:12:17 · 2 answers · asked by Anonymous in Mathematics

-Area=56.52
-Use 3.14 for pi
-Tell me the steps on how to do this problem please!!
************THANK YOU IN ADVANCE*****************

2007-12-30 18:10:53 · 9 answers · asked by Anonymous in Mathematics

i know i can give u a clue ne ea so wh oky have fun answering the question.

2007-12-30 18:02:34 · 6 answers · asked by Anonymous in Geography

2007-12-30 18:01:16 · 3 answers · asked by footballcrazyshikharr 1 in Mathematics

Come on, lets see who has what as a background. Degree, work experience, diploma or general interests.

What is your background?

2007-12-30 17:57:20 · 7 answers · asked by Cactus Jack 4 in Geography

Ok, I have 3 16oz bottles and a 2 QT bottle. If I made the 2QTs of kool-aid would it fit in to the 3 16 oz bottles? How much would be left?

2007-12-30 17:54:35 · 2 answers · asked by Braedyn is due 5/8/08! 2 in Mathematics

2007-12-30 17:54:13 · 8 answers · asked by Anonymous in Astronomy & Space

Give details

2007-12-30 17:49:32 · 4 answers · asked by Debasmita 1 in Geography

Details please!

2007-12-30 17:47:39 · 2 answers · asked by Debasmita 1 in Geography

i have a test on that when i get back to school, and i barely understand it. im in seventh, so in those standerds please. if i get a good answer in 24 hours, youll get best answer. i really want to understand it because i have a 4.0 gpa and i dont want to ruin my science grade right before report cards. thank you all that answer!!!

2007-12-30 17:39:33 · 6 answers · asked by Anonymous in Biology

why salty solution have higher boiling points than the pure water (H2O) when the presence of impurities (salt) will weakened the covalent bond between the water molecules? should it be lower boiling points in salty water?

2007-12-30 17:37:12 · 5 answers · asked by refuzie 2 in Chemistry

The reaction is C6H12O6 (aq) --> 2C2H5OH (aq) + 2CO2 (g).
Fermentation of 750 mL grape juice (density = 1 g/mL) is allowed to take place in a bottle with a total volume of 825 mL until 12% by volume is ethanol (C2H5OH). If CO2 is soluble in H2O (obeys Henry's Law), what would be the pressure of CO2 inside the wine bottle at 25 degrees C? at 125 degrees C? Use the data given in the problem to calculate the partial pressure of CO2 in the gas phase and the solubility of CO2 in the wine at 25 degress C. The Henry's law constant for CO2 is 3.1 x 10^ -2 mol/L . atm at 25 C with Henry's law in the form C = kP, where C is the concentration of the gas in mol/L.
This question is really confusing..can someone help me please?

2007-12-30 17:36:54 · 2 answers · asked by me 2 in Chemistry

Sequence has no mathematical formula but it has some formula for its terms, easy to get it by observation, please.
If nobody answers correctly, one of the correct answers (both the blank spaces filled) will be posted here at the last moment to have fun and feelings.

2007-12-30 17:34:32 · 9 answers · asked by sv 7 in Mathematics

Since january 1980 the population of the city of brownville has grown according to the mathematical model y=720,500(1.022)^x, where x is the number of years since january 1980.

explain what the numbers 720,500 and 1.022 represent in the model.

If this trend continues, use the model to predict the year during which the population of brownville will reach 1,548,800.

2007-12-30 17:31:38 · 5 answers · asked by Lovelygirl 1 in Mathematics

He set on the (earth), mountains standing firm, high above it, and bestowed blessings on the earth, and measure therein all things to give them nourishment in due proportion, in four Days, in accordance with (the needs of) those who seek (Sustenance).
Moreover He comprehended in His design the sky, and it had been (as) smoke: He said to it and to the earth: "Come ye together, willingly or unwillingly." They said: "We do come (together), in willing obedience."
So He completed them as seven firmaments in two Days, and He assigned to each heaven its duty and command. And We adorned the lower heaven with lights, and (provided it) with guard. Such is the Decree of (Him) the Exalted in Might, Full of Knowledge. fusslat 41.11 quran

2007-12-30 17:24:17 · 4 answers · asked by HalahenA 5 in Astronomy & Space

If one were to do an MRI scan of someone thinking about the concept of "God, " being that God is (theoretically) something seperate from just a concept, is the MRI scan any less "god" than saying the word, expressing the thought, or reading the Bible?

If one were to find we were wrong and there was no God would that MRI scan be any less "God" then it was when it was thought?

2007-12-30 17:22:04 · 8 answers · asked by Anonymous in Medicine

What velocity does the ball hit the grond?

gravity=-32ft/sec.sq

2007-12-30 17:19:22 · 4 answers · asked by Anonymous in Mathematics

The original posts are here:
http://answers.yahoo.com/question/i...

My question that pertains to this topic is couldn't we find a means producing a rocket that generates enough propulsion to do this?

My Thoughts:

Well there are a few factors that we need to take into consideration, but I'll stick to the most simplistic.

The earth rotates at X amount of miles per minute.
So we would need to stop earth's rotation for a brief duration of time.

Easily done however, attach two of these rockets on opposite sides of the globe to counter act the rotation and stop the rotation entirely.

Next we launch a third rocket to physically move the planet X amount of miles.

Than we launch a fourth rocket to regenerate earth's rotation.

Well some may ask how do we attack this rocket to earth....

Couldn't you bury an anchor roughly half way to the center of the earth?

2007-12-30 17:18:41 · 3 answers · asked by NA N 1 in Astronomy & Space

with mercury and toxic risin gas or whatever that stuff is mixed with a bunch of carbon dioxide that was solidified.
Wonder if someone could top all that...

2007-12-30 17:08:57 · 7 answers · asked by some black dude with no life 1 in Chemistry

2007-12-30 17:07:08 · 2 answers · asked by Anonymous in Chemistry

If an event is post on the same day like for an example a math competition and a sports day with the students at your school which one would you go to and why? I want to go to both, but now its on the same day and same time, so I need your vote? Which one would YOU rather go to the sports day thingy, or the math competiton, I want to go to both but I can't cast your vote with a reason PLEASE!!!!

2007-12-30 17:04:47 · 7 answers · asked by Anonymous in Mathematics

(x+3)/(x-1)

2007-12-30 17:03:05 · 8 answers · asked by ashlea o 2 in Mathematics

How many sec. will the ball be going up?

gravity =-32ft/sec.sq

2007-12-30 16:56:53 · 4 answers · asked by Anonymous in Mathematics

1) Why is it needed that the concentrated HCl is cold upon addition to the tert butanol?
2) Why is distillation a part of the synthesis of tert butyl chloride?
3) Why is it important that the flow of water in the condenser continous?

Thank you very much!

2007-12-30 16:52:47 · 1 answers · asked by Aj 2 in Chemistry

2007-12-30 16:44:50 · 10 answers · asked by MARIE D P 1 in Mathematics