Science & Mathematics - 24 December 2006

Just something with a motor, propeller, and a plate. Or a Hovercraft (plastic bowl with fan inside). Url links will do fine.

2006-12-24 10:19:24 · 6 answers · asked by neounlimitedforever 2 in Engineering

Okay, energy excites electrons... their energy level increases, so they move further away from the nucleus of the atom (protons and neutrons) - but when the energy excites them, how does it move to a new, further away, atomic orbital? does it all of the sudden "bounce" to the next sub-energy/primary enegy level? Does it slowly move? HELP!

2006-12-24 10:17:21 · 7 answers · asked by Upon this rock 3 in Physics

2006-12-24 10:14:00 · 17 answers · asked by My Poetry Is Deep I Neva Fail 4 in Astronomy & Space

2006-12-24 10:12:30 · 10 answers · asked by thereisnobathroom! 3 in Other - Alternative

2006-12-24 10:09:37 · 12 answers · asked by CHRISTY.d. 2 in Mathematics

The Video of a couple russian Migs chasing a cigar shaped UFO, is that real or some sort of hoax?

2006-12-24 10:07:20 · 5 answers · asked by JB 2 in Astronomy & Space

2006-12-24 10:06:03 · 4 answers · asked by jonester 2 in Physics

Okay, energy can get captured by electrons in atoms, when this happens their energy level increases...... (and so on) But, how does energy excite electons if it isn't physical? Like light excites electrons for photosynthesis.... WHAT kind of energy excites electrons? How?

2006-12-24 10:05:07 · 5 answers · asked by Upon this rock 3 in Physics

2006-12-24 10:01:52 · 3 answers · asked by no name 1 in Chemistry

I've seen many relativistic proofs why Santa can't possibly deliver billions of presents tonight, but what if he is just delivers at all the different places at once? I mean, quantum theory allows that, doesn't it?

2006-12-24 09:55:48 · 4 answers · asked by Scythian1950 7 in Other - Science

2006-12-24 09:54:26 · 5 answers · asked by Anonymous in Earth Sciences & Geology

i want to knw what are the subjects studied in 1st, 2nd, 3rd, ect year of dentistry?

2006-12-24 09:51:46 · 4 answers · asked by Aaliyah J 1 in Medicine

I need to find the magnitude and amplitude of the resultant. My teacher showed us a way to do it without having to draw them...but I don't understand.

2006-12-24 09:49:34 · 7 answers · asked by Anonymous in Mathematics

The one that took place on May 7, 2005 at Massachusetts Institute of Technology.

2006-12-24 09:46:07 · 5 answers · asked by Anonymous in Biology

starting my own extension building co and cant remember the maths used to check if a particular corner of a building is square

2006-12-24 09:42:17 · 14 answers · asked by CHRISTY.d. 2 in Mathematics

what is the difference between a girl reindeer and a boy reindeer?

2006-12-24 09:40:40 · 14 answers · asked by xxraymond818xx 2 in Zoology

In other words, is it generative, productive, etc.?

2006-12-24 09:28:16 · 6 answers · asked by Ejsenstejn 2 in Mathematics

Is rust magnetic?

2006-12-24 09:13:52 · 9 answers · asked by Charlie-chan 1 in Chemistry

I am new to chemistry so please make your explanations easy to understand! Any help is appreciated.

2006-12-24 09:12:58 · 10 answers · asked by Gideon 1 in Chemistry

Does our solar system( including our sun) orbit around another star greater than the sun? If so.. are there any books or web sites you recommend me to read? And also.. how long does it take for this orbit to take place and how far away from our sun is whatever we are orbiting?

2006-12-24 09:12:06 · 6 answers · asked by Just Me 2 in Astronomy & Space

i want to buy cheap but nice telescope of less than 100$. i want to c stars,detail view of moon and other planets.. and i want such feature that i can take pictures or movie....(so that i can add device to take photo later on).
where can i buy it.
what things i need to focus on?
give me some ideas i dont have any ideas abt telescope...

2006-12-24 09:09:32 · 3 answers · asked by eminent_youtom 1 in Astronomy & Space

2006-12-24 09:09:14 · 6 answers · asked by anthony j 1 in Zoology

A forest ranger spots a forest fire from the top of a lookout tower. The tower is 150m tall, and the angle of depression to the fire is 10 degrees. About how far is the fire from the foot of the tower? Round to the nearest meter.

A. 148m
B. 753m
C. 863m
D. 851m

I tried to use the tangent but it kept on iving me 26.4 or something like that and I couldn't figure out what I was doing wrong even though this simple trigonometry is usually pretty easy for me.

2006-12-24 09:06:04 · 10 answers · asked by emimi 2 in Mathematics

Can u select one of these answers?
a. Lower A and lower Z than the reacting nuclei.
b. Same A and same Z as the reacting nuclei
c, Higher A and lower Z as the reacting nuclei
d. Higher A and higher Z as the reacting nuclei
e. Lower A and higher Z as the reacting nuclei

2006-12-24 09:05:47 · 4 answers · asked by PLK 1 in Physics

Can u select one of these answers?
a. Lower A and lower Z than the reacting nuclei.
b. Same A and same Z as the reacting nuclei
c, Higher A and lower Z as the reacting nuclei
d. Higher A and higher Z as the reacting nuclei
e. Lower A and higher Z as the reacting nuclei

2006-12-24 09:03:53 · 1 answers · asked by PLK 1 in Physics

If our universe is constantly expanding, what is it expanding into?

2006-12-24 09:02:25 · 18 answers · asked by Anonymous in Astronomy & Space

Like, what causes them, not scientifically, but why. For example: you might get them if you're too full, etc.

2006-12-24 09:02:22 · 5 answers · asked by cat 3 in Biology

2006-12-24 09:01:10 · 3 answers · asked by styles4u 4 in Mathematics

like for example if salt is NaCl, than what is the formula for liquid dish soap?

2006-12-24 08:59:13 · 7 answers · asked by kristn4christ 2 in Chemistry

2006-12-24 08:57:29 · 11 answers · asked by ? 6 in Biology