Science & Mathematics - 26 August 2007

Eliminate the parameter and write a rectangular equation for:

x=t^2 + 3
y=2t

2007-08-26 13:23:52 · 6 answers · asked by Anonymous in Mathematics

So, let's take a paradox - two things that cannot exist together.

Let's assume that the two things DO coexist.

Is this possible??? Huh, is it???

2007-08-26 13:21:48 · 3 answers · asked by Anonymous in Physics

We build swimming pools in East Central Florida. When we dig in certain spots along the Indian River, we hit sections of coquina, which is made up of little petrified shells all compressed together. Sometimes it is as hard as rock, not that we see much rock in Florida, lol.

What time period do these shells date from and does anyone know what they are called?

2007-08-26 13:21:41 · 1 answers · asked by Mugwump 7 in Earth Sciences & Geology

According to Brian Greene's book, The Elegant Universe, page 329, "... a three-dimensional sphere inside a Calabi-Yah space can collapse without an ensuring disaster, because a three-brane wrapped around it provides a perfect protective shield." Then on page 324, he writes: "... the three-brane can wrap around and completely cover a three-dimensional sphere. ... a three-brane has three extended dimensions." Then, on his CDs, he ask the question: could our universe be a three-brane?

So, is a three-brane small like the Planck distant or somehow large like our universe? And, what would cause space to rip or tear in the first place?

2007-08-26 13:14:01 · 1 answers · asked by Bob D1 7 in Astronomy & Space

According to Brian Greene's book, The Elegant Universe, page 329, "... a three-dimensional sphere inside a Calabi-Yah space can collapse without an ensuring disaster, because a three-brane wrapped around it provides a perfect protective shield." Then on page 324, he writes: "... the three-brane can wrap around and completely cover a three-dimensional sphere. ... a three-brane has three extended dimensions." Then, on his CDs, he ask the question: could our universe be a three-brane?

So, is a three-brane small like the Planck distant or somehow large like our universe? And, what would cause space to rip or tear in the first place?

2007-08-26 13:13:11 · 1 answers · asked by Bob D1 7 in Physics

2007-08-26 13:11:15 · 3 answers · asked by Anonymous in Geography

1. if u cant observe something can u study it scientifically
2. why is it important that an experiment has a contol group
4.why is evolution not an example of scinece
5.what obstacles prevent science from being infallible
6. how does ones worldview influence his presuppositions
7. what are three statements that represent a Christian worldview and 3 that represent a non Christian worldview
first one to answer right all these gets 10 points

2007-08-26 13:07:15 · 6 answers · asked by vgking13 2 in Other - Science

Some modern toys are now manufactured with sensors that read & respond to brain waves. As headphones can also be used as a microphone, and a microphone can be used to emit sound (though each operates less efficiently at the task for which it was _not_ designed), might it also be possible to "transmit" a signal from such a sensor that could provoke some sort of response in the brain via the same features the brain uses to broadcast brain waves?

2007-08-26 13:06:34 · 4 answers · asked by uncleclover 5 in Physics

2007-08-26 13:01:16 · 8 answers · asked by 00000000 1 in Physics

the pH of a 0.02M solution of a weak acid was measured to be 5.2. What is the [H+] of this solution? What is the Ka of this solution?

2007-08-26 13:00:56 · 1 answers · asked by jon st. germain 1 in Chemistry

I once read in school that magnetism comes out of one side of a magnet, goes around, and then goes back into the other side of the magnet. Like making a circle.

Do we know HOW magnetism is moving out, and in, the magnet?
What is making the - energy? - that makes magnetism, move?

I think of energy stored in a battery. But in a battery, the energy goes out, does not come back to the battery.

2007-08-26 13:00:35 · 1 answers · asked by Anonymous in Physics

ounces of weed killer do you need?

2007-08-26 12:58:35 · 2 answers · asked by firecrackergirl 1 in Mathematics

Why are rainbows always curved?

2007-08-26 12:54:58 · 6 answers · asked by Anonymous in Weather

My son is doing this for homework and I don't understand how to do it. He has a few more questions similar to this. Thank you.

2007-08-26 12:53:05 · 5 answers · asked by magicswoman4982 1 in Mathematics

G(3,0) H (8,10)

2007-08-26 12:52:47 · 2 answers · asked by steve e 1 in Mathematics

Can someone please check to see if my answers are correct please!!! Thanks so much!!! If the answer is incorrect please correct it. The questions are in this format:

12A=_____mA

here they are:

12 A (Amp)=12,000 mA(milliamp)

4295 mA= 4.295 A

16210 Microamp=16.210 mA

.9 mA=900 Microamp

1.5 A=1,500,000 Microamp

.005 A= 5.00 mA

2007-08-26 12:50:55 · 4 answers · asked by Anonymous in Engineering

2007-08-26 12:44:23 · 8 answers · asked by firecrackergirl 1 in Mathematics

Simplify the expression 10^log(AB)

2007-08-26 12:39:24 · 2 answers · asked by Clay H 1 in Mathematics

I have a TI-83 (not TI-83+), can I buy a usb cable and connect it and use some kind of software to save screen shots on my computer? and what kind of of cable would that be?

2007-08-26 12:39:21 · 2 answers · asked by anebgx 2 in Mathematics

If the hypotenuse of a 30-60-90 triangle is 4√3, how do i got about to figure out the length of the 2 legs? Help please

2007-08-26 12:39:12 · 3 answers · asked by jumba 1 in Mathematics

y^2 - 7y = -10.

I am supposed to divide -7 by 2 (or in half).
and then square that.
well -7 divided by 2 is -3.5
-3.5 * -3.5 = 12.25
then I am supposed to add 12.25 to both sides. well should I round it off to 12?
what did I do wrong. I always have a hard time figuring these when the coeffient of the variable is an odd number.
thanks if you can help me.

2007-08-26 12:29:30 · 7 answers · asked by Boo Radley 4 in Mathematics

If I have a line that has point A, B, C and D can I make a ray from point A to D? Can a ray include other points? What would the other rays be? Any other helpful hints about rays would be helpful.

2007-08-26 12:25:49 · 1 answers · asked by Jen 4 in Mathematics

Type in WORD a half-page reflection on how they think Geometry relates to playing pool..

2007-08-26 12:20:40 · 7 answers · asked by Anonymous in Mathematics

2007-08-26 12:12:58 · 6 answers · asked by Anonymous in Biology

Identify each of the following items as a mixture or a compound. Classify the mixtures as homogeneous or heterogeneous

1.) raw egg
2.) ice
3.) gasoline
4.) blood

2007-08-26 12:10:37 · 7 answers · asked by tenizgurl7 3 in Chemistry

Here is a website:
http://synopsys.championship.g...

so you think alll these award winning projects are original? What about the award-winning projects in Intel ISEF? Aren't many topics from science magazines?

2007-08-26 12:03:06 · 2 answers · asked by Anonymous in Engineering

change 21/4 to an improper fraction before calculating.

2007-08-26 11:55:39 · 12 answers · asked by firecrackergirl 1 in Mathematics

I found a small bees' nest on our garage.Why would they do it on ours? how do they build them?

2007-08-26 11:50:59 · 2 answers · asked by Anonymous in Zoology

2007-08-26 11:45:26 · 4 answers · asked by Eluterio G 1 in Zoology

I heard mars is going to crash into earth tommorrow night and knock out all those people who post the Mars/Moon hoax 15 times a day even though someone just asked the same question 2 questions ago........
Raise your hand if you would stay up to see that.

2007-08-26 11:44:31 · 10 answers · asked by Anonymous in Astronomy & Space