Science & Mathematics - 13 September 2006

2006-09-13 08:34:45 · 10 answers · asked by Lauren D 4 in Mathematics

Is there a theory in Physics or Astrophysics that follows the idea that the universe is just a small part of something bigger (the macroverse?) like we are made of atoms and atoms are made of subatomic particles, the Macroverse is a collection of universes or multiverses? (please provide references if at all possible)

2006-09-13 08:33:53 · 4 answers · asked by Anonymous in Astronomy & Space

2006-09-13 08:33:49 · 6 answers · asked by Anonymous in Biology

Compared to an empty ship, would a ship loaded w/ a cargo of styrofoam sink deeper into water, or rise?

2006-09-13 08:32:20 · 9 answers · asked by MegN 1 in Physics

2006-09-13 08:32:05 · 8 answers · asked by Anonymous in Biology

Okay, so I have a calc problem:

Directions say this problem has one local max and one local min point.

f(x)= (-1/3)x³+2x²-12

Math I've done:
d/dx = 3(-1/3)x²+4x
d/dx = -x²+4x
0 = -x²+4x
0/-x = -x²+4x / (-x)
0 = x - 4
so x = 4
then
d²/dx² = -2x+4 | x=4
= -2(4)+4 = -4 < 0
so concave down, with local max @ x=4, and no local min and no inflection point.

BUT if I don't simplify 0 = -x²+4x ... x = 0 or 4. and then:
d²/dx² = -2x+4 | x=0,4
= -2(0)+4 = 4 > 0
= -2(4)+4 = -4 < 0
and then there is a local min @ x=0 and a local max @ x=4
then:
d²/dx² = -2x+4
0 = -2x+4
-4 = -2x.. -4/(-2) = -2x/(-2)
2 = x ... so inflection point at x = 2.

The book has the bottom answer and I'm sure its correct..
All I want to know is: What am I missing? Why do I get the wrong answer? I've divided both sides by (-x), shouldn't it still work?
If the problem were: 0 = 3x²-27 .. I'd divide both sides by 3, and still get the right answer.

Why not when i divide by x?

2006-09-13 08:29:27 · 7 answers · asked by Sean06 2 in Mathematics

What kind of procedure can be used to simply determie the salinity of the seawater in lab?dehydration, crystalization,etc.,

2006-09-13 08:27:46 · 6 answers · asked by curiousgeorge 1 in Chemistry

i am in 6th grade, advanced math, so really 7th grade math we read and i will give ten points to whoever answers this right!(i wrote i t down and solved it already) THIS PROBLEM IS A FRACTION!! (sorry i couldn't find the division sign)

5+[19 - (3) (4)] over 3 (6) divided by [(3+4)+ (5-3)] =
WHAT'S THE ANSWER?

ps i am not asking you to do my homework trust me i already solved it and if you don't believe you'll see when you get an e-mail saying: Your answer has been chosen as best answer.

2006-09-13 08:26:55 · 17 answers · asked by puh-lease 3 in Mathematics

what happens if you smoke a cigarette covered with nitroglycerin?
would you explode, or your lungs, or nothing, or would you just cough?

2006-09-13 08:26:26 · 3 answers · asked by Anonymous in Other - Science

2006-09-13 08:21:30 · 2 answers · asked by joe^black 1 in Engineering

We say that the shape of a liquid is that of its ontainer. But w/ no container and no gravity, what is the natural shape of a blob of water?

2006-09-13 08:20:35 · 17 answers · asked by MegN 1 in Physics

Do scientists really know what they are talking about anymore? Why after so long they decided to get Pluto out of the solar system? Weird!

2006-09-13 08:17:35 · 13 answers · asked by CON"FOOL"CIOUS 2 in Astronomy & Space

2006-09-13 08:16:17 · 13 answers · asked by Anonymous in Other - Science

since there is essentialy nothing for it to expand into, why did it not just go as far as it could instintaniously? (even if this did mean an eventual implosion or whatever!)

2006-09-13 08:15:58 · 25 answers · asked by jack o 1 in Astronomy & Space

i mean the mystical ones. i definately, positively swear i have seen one! it was so amazing!

2006-09-13 08:14:59 · 11 answers · asked by mackenzie d 1 in Other - Science

go to school for firefighting

2006-09-13 08:11:45 · 12 answers · asked by firegirl_babygirl 1 in Mathematics

I would like to find out how to measure how many gallons my aquiarium is18 inches deep and each side is of the hexagon is 24 inches long.

2006-09-13 08:10:58 · 3 answers · asked by mary 1 in Mathematics

I had never seen them before where I live but this year I can't get rid of them from my fruit bowl.

2006-09-13 08:10:16 · 6 answers · asked by Nosheen Elfqueen 3 in Other - Science

*A,*C,*D,*Z

2006-09-13 08:09:58 · 4 answers · asked by Queen G 1 in Other - Science

i mean is the most stupid theory i've ever heard - who believes in that.. i better keep quiet

2006-09-13 08:08:44 · 11 answers · asked by Anonymous in Other - Science

and make sure it's correct!!! PLEEZE!

2006-09-13 08:07:58 · 5 answers · asked by Anonymous in Mathematics

When evolutionists speak of evolution they speak of it as having the purpose of survival behind (this animal developed this so that it could do this which helps it survive). Where does that purpose come from? A cell or what?

2006-09-13 08:03:19 · 7 answers · asked by Mister Farlay 2 in Other - Science

I hear that we will NEVER be able to communicate effectively with other life forms because the time it would take for a signal to complete a roundtrip to a chosen destination would be too long for any of us or our descendants to grasp.

2006-09-13 07:54:58 · 6 answers · asked by Prince Auggie 2 in Astronomy & Space

2006-09-13 07:49:37 · 2 answers · asked by super_man 3 in Astronomy & Space

2006-09-13 07:49:01 · 6 answers · asked by sathya 1 in Engineering

there small and look stupid ugly ,, i'm thinking that they use their instincts to live not brain am i right???

2006-09-13 07:49:00 · 4 answers · asked by Anonymous in Biology

2006-09-13 07:48:39 · 12 answers · asked by walkinqueen 1 in Earth Sciences & Geology

Believe it or not, a company called Space Adventures(spaceadventures.com) is currently talking $980.00 reservations
for orbital spacewalks. You can call 1-888-85-SPACE to be put
on a reservations list. This is the same company that sent
Dennis Tito(that strange looking bald guy), and Mark Shuttleworth.
Spacewalks are fully operational now. They cost $33 million,
and there is a guy going up monday. The guy that answered the phone told me. I have to say that the first civilians that try it have balls of steel to have the audacity to float in orbital space tethered to a cord.(First guy to do it-Alexei Leonov March '65) Talk about a thrill ride! Again, who here would have the balls to do it?
WHo would have the minor balls to take a suborbital flight like Tito
to the International Space station? How cool to see Columbus
wasn't just whistling dixie for yourself!
To speak with a Space Adventures representative call 1-888-85-SPACE...............

2006-09-13 07:48:30 · 4 answers · asked by Anonymous in Astronomy & Space

2006-09-13 07:45:33 · 30 answers · asked by Anonymous in Weather

to make a Baker's Dozen?

2006-09-13 07:42:58 · 9 answers · asked by krodgibami 5 in Mathematics