Science & Mathematics - 26 December 2006

What is the limit as h-->0 of [sin(pi/6 + h) - sin(pi/6)] / h ? It could help if you try writing it out in proper notation first.

2006-12-26 13:26:48 · 8 answers · asked by malibucat1 1 in Mathematics

I know this looks like a yes/no question but I want to know why for either answer, non of these problems seems even close to math I or math II. but I'm just dreaming.

2006-12-26 13:25:24 · 6 answers · asked by He5ham 1 in Mathematics

The Amazing Hot Heart Massager is a gel-filled, heart shaped pack used to give massages. There is a small metal disk floating in the gel, when you bend the disk, it snaps and the gel around the disk quickly heats up, turns to a crystalised material, and the heat quickly spreads through out the whole gel pack.
It stays hot for about an hour, then gets kind of hard. To reset it, you drop the pack into a pot of boiling water for 10 minutes. I'm sure there's some sort of scientific explanation of it, I hope someone knows what I'm talking about and can tell me how it works.

2006-12-26 13:22:03 · 0 answers · asked by zimani08 2 in Chemistry

2006-12-26 13:21:07 · 8 answers · asked by missy m 1 in Botany

It looked like an orange basketball slowly falling out of the sky. It finally burned out leaving the sky a reddish-orange color.

2006-12-26 13:20:07 · 6 answers · asked by small1 1 in Astronomy & Space

Looking over textbook, I realize they never use cos^-4, for example. They only use sec ^ 4. Is it wrong or just better?

2006-12-26 13:18:49 · 6 answers · asked by Anonymous in Mathematics

What are some reasons it is good that water expands when it freezes and what are some reasons it's not so good?

2006-12-26 13:16:32 · 3 answers · asked by buggiebuddy 1 in Earth Sciences & Geology

I was watching History channel and they stated that in 2039 a huge astroid will wipe us out. It will be a little smaller than U.S. Could it wipe all Earth out? Think about it. I'll be 34 yrs. old. Think about how old you would be. Search it, research it, and imagen how strong 7 atomic bombs would be put togather, and going off togather at the same time! Could it. Please tell me why in your answer.

2006-12-26 13:16:28 · 19 answers · asked by reeddite 1 in Astronomy & Space

Do we humans use 10% of our brains or do we use 100%?

If only 10 then ow does one use the other 90%?

Where did that legend start as well?

2006-12-26 13:14:33 · 14 answers · asked by ? 6 in Biology

2006-12-26 13:12:39 · 13 answers · asked by Anonymous in Astronomy & Space

Jim has 5 pieces of string. He needs to choose the piece that will be able to go around his 36-inch waist. His belt broke, and his pants are falling down. The piece needs to be at least 4 inches longer than his waist so he can tie a knot in it, but it cannot be more that 6 inches longer so that the ends will not show from under his shirt. Which of the following pieces of string will work the best?

2006-12-26 13:12:17 · 6 answers · asked by janki t 1 in Other - Science

2x^2-2x-12=0

(2x+6)(x-2)

2x+6=0
2x=6
x=3

x-2=0
x=2

I THINK the two answers for this question are 3 and 2. The thing is, I was taught that the two numbers that multiply to the last number (-12) must also add up to the middle number (2). +6-2=4 and not 2. So how do I know what two proper numbers to use?

2006-12-26 13:11:03 · 13 answers · asked by Anonymous in Mathematics

2006-12-26 13:09:35 · 1 answers · asked by anna 1 in Weather

i think that quantum physics has its answer in all things that you do like if you run so many experiments you will eventualy find a pattern and it will eventually start over

2006-12-26 13:04:58 · 3 answers · asked by mrg5834 1 in Physics

What do u think would happen if humans where able to use all 100% of our brains ?? We only use I think 3% or even less, what sort of things are we able to acheive with the full 100% ??

2006-12-26 13:04:56 · 8 answers · asked by Anonymous in Biology

Who's very smart how tall the dinosaurs?

2006-12-26 13:03:48 · 1 answers · asked by neecee85 1 in Zoology

2006-12-26 13:00:58 · 8 answers · asked by dopepink 1 in Mathematics

does anyone know of footage from any space shuttle reentering with plasma from outside, like chaseplane, besides the colombia?

2006-12-26 12:59:53 · 6 answers · asked by hfbldprince101 2 in Astronomy & Space

2006-12-26 12:57:41 · 8 answers · asked by sm 1 in Medicine

whats the difference between inhibitor genes and dominant epistasis.
by definition, inhibitor genes and dominant epistasis,both refer to the presence of one dominant allele at the first locus prevents the expression at the second locus.
inhibitor: 13:3 dominant epistasis: 12:3:1
cheers

2006-12-26 12:55:08 · 1 answers · asked by Anonymous in Biology

2006-12-26 12:55:04 · 8 answers · asked by Anonymous in Paranormal Phenomena

my mind always tries to calculate the shortest path from point A to B such that this par would consist of 1/4 of a circle and that they would form regular shapes for example http://www.geocities.com/hasha_2004/untitled.bmp
I mean really random stuff, like how long could the wall be after cutting through the A diagonal, please provide me with any theorems or advice because this thing has messed with my head long enough.

2006-12-26 12:54:44 · 3 answers · asked by He5ham 1 in Mathematics

Why is it when NASA shows current pictures of the moon with super lens like the Hubbel Telescope, don't they ever show a picture of 'that' flag? Do you think that they really landed on the moon? And why with telescopes like the Hubbel don't they ever show other spacecraft out there (i.e. UFO's)?

2006-12-26 12:54:30 · 6 answers · asked by tk.cooper@verizon.net 1 in Astronomy & Space

Evolutionists?
I am constantly told by evolutionists that I am stupid because I don't believe what they believe (not all, but a lot). So let me ask some (just a couple) questions that bother me about evolution and give me your best information.
Which evolved first (how, and how long, did it work with or without the others?)
-Digestive system, the food to be digested, the appetite, the ability to find and eat food, the digestive juices, or the bodies resistence to those juices?
-The drive to reproduce or the ability?
-The lungs, the throat, or the perfect exchange of gases?
-DNA or RNA to carry the DNA message to cell parts?
-The plants or the insects that live on and pollinate the plants?
-Bones, ligaments, tendons, blood supply,or the muscles to move the bones?

Just pick one and go with it unless you think you can generalize anything. I would think it to be easier to just pick one though.

2006-12-26 12:52:06 · 9 answers · asked by ScottyJae 5 in Biology

Does he weigh less than 145 pounds or more than 145 pounds?

2006-12-26 12:51:58 · 21 answers · asked by James C 1 in Other - Science

2006-12-26 12:51:40 · 3 answers · asked by ceree_morris 1 in Engineering

I'm trying to figure out how far away our solar system's Asteroid Belt is from Earth (From Earth to its leading edge) - and how wide it is. All of the sources that I've checked only use AU's instead of miles.

Only serious answers on the subject will be considered for 'Best Answer'.

2006-12-26 12:49:49 · 5 answers · asked by Oklahoman 6 in Astronomy & Space

I was told a mcrowave works on sound energy focused on water molecules to generate heat. If true,where does the elecrical appearing reaction with metal come from?

2006-12-26 12:48:15 · 13 answers · asked by Neil H 1 in Physics

I'm trying to figure out how far away our solar system's Asteroid Belt is from Earth (From Earth to its leading edge) - and how wide it is. All of the sources that I've checked only use AU's instead of miles.

Only serious answers on the subject will be considered for 'Best Answer'.

2006-12-26 12:47:24 · 4 answers · asked by Oklahoman 6 in Astronomy & Space

In the laboratory you are given a cylindrical beaker containing a fluid and you are asked to determine the density of the fluid. You are to use a negligible mass and unknown spring constant attacked to a stand An Irregularly shaped object of known mass and density hangs from the spring. You may also choose a metric ruler, a stopwatch or a string to complete the task.
a. Exp. how you could experimentally determine the spring constant.
b. The spring-object is now arranged so that the object but none of the spring is immersed in the unknown fluid. Describe any changes that are observed in the spring-object system and explain why they occur
c. Exp. how you could experimentally determine the density of the fluid.
d. Show explicitly, using equations how you willuse your measurements to calculate the fluid density.

2006-12-26 12:46:25 · 3 answers · asked by Kitana 2 in Physics