Science & Mathematics - 15 October 2006

Need more info on laser light...

From CNN:

http://archives.cnn.com/2000/TECH/space/07/20/speed.of.light.ap/#graph

Scientists have apparently broken the universe's speed limit.

For generations, physicists believed there is nothing faster than light moving through a vacuum -- a speed of 186,000 miles per second.

But in an experiment in Princeton, New Jersey, physicists sent a pulse of laser light through cesium vapor so quickly that it left the chamber before it had even finished entering.

The pulse traveled 310 times the distance it would have covered if the chamber had contained a vacuum.

2006-10-15 15:41:56 · 12 answers · asked by Anonymous in Other - Science

Need more info on laser light...

From CNN:

http://archives.cnn.com/2000/TECH/space/07/20/speed.of.light.ap/#graph

Scientists have apparently broken the universe's speed limit.

For generations, physicists believed there is nothing faster than light moving through a vacuum -- a speed of 186,000 miles per second.

But in an experiment in Princeton, New Jersey, physicists sent a pulse of laser light through cesium vapor so quickly that it left the chamber before it had even finished entering.

The pulse traveled 310 times the distance it would have covered if the chamber had contained a vacuum.

2006-10-15 15:41:22 · 5 answers · asked by Anonymous in Physics

2006-10-15 15:39:29 · 2 answers · asked by ___joel___ 1 in Other - Science

2006-10-15 15:38:35 · 5 answers · asked by Anonymous in Other - Science

like if the points are (1.5,1) and (3,2)

2006-10-15 15:38:17 · 10 answers · asked by metallicarocks772 1 in Mathematics

2006-10-15 15:29:29 · 2 answers · asked by Fly! Be Free! 2 in Earth Sciences & Geology

A particular infrared signal is detected with frequency of 1.20x10^13 Hz. What is its wavelength? [Use the special boxes for entering scientific notation, not the "E" notation. Make sure your mantissa (the first part) is a number between 1.000 and 9.999. As usual, use SI units.]

2006-10-15 15:26:56 · 4 answers · asked by bri 1 in Astronomy & Space

2006-10-15 15:26:34 · 11 answers · asked by narmy 1 in Chemistry

I haven't found an answer yet. Do you know what it is?

2006-10-15 15:26:21 · 10 answers · asked by quikboy 7 in Biology

how much work is done by a person who picks up a 3-kg crate from the floor, raises it 2 m, and sends it flying with a speed of 4 m/s? and how?

2006-10-15 15:26:18 · 2 answers · asked by rocky s 1 in Physics

A rifle is aimed horizontally at a target 50m away. The bullet hits the target 2cm below the aim point.

2006-10-15 15:24:23 · 2 answers · asked by Leslie P 1 in Physics

2006-10-15 15:21:54 · 4 answers · asked by bri 1 in Astronomy & Space

2006-10-15 15:21:53 · 1 answers · asked by Ellie 1 in Biology

Iv'e had this idea for a self-running air conditioner. This may seem an odd time, coming into colder seasons, but I'd still like to confirm the idea.

Heat is a form of energy, correct? Well, why can't something be powered by heat? How the machine basically works:

A certain mechanism/material absorbs the heat in the air ind comverts that into kinetic/electric energy. That energy rotates a fan, which pushes the now cooled air(the air which the heat was absorbed from).

Is there any way of implimenting this, and is it even possible?

2006-10-15 15:21:32 · 5 answers · asked by lewa 2 in Physics

Alway considered Hawii Island recent creation of volcanic actitity. Then it occurd to me all land mass was createdd by volcanic activity. Are the falt lines seperates due to different eruptions? Is it that simple excluding all the factors producted by movemt and aging of above ground forces.

2006-10-15 15:19:17 · 3 answers · asked by Mister2-15-2 7 in Earth Sciences & Geology

2006-10-15 15:18:22 · 3 answers · asked by peternguyen1357 1 in Earth Sciences & Geology

2006-10-15 15:18:15 · 5 answers · asked by Professor Armitage 7 in Other - Science

It's a science quistion and it's 9 letters.

2006-10-15 15:16:18 · 1 answers · asked by Bailey 2 in Physics

My 10 year old nephew asked me this question and I hate to admit that I have absolutely no answer! And I have not had any success researching it.

Why does it make cats frisky? And why does it not affect other animals or humans?

2006-10-15 15:13:03 · 2 answers · asked by Anonymous in Biology

for example...if you are going to a new city.....how would a map help you?

2006-10-15 15:11:24 · 7 answers · asked by Hey! 1 in Geography

2006-10-15 15:10:41 · 6 answers · asked by thegodfather 1 in Physics

2006-10-15 15:10:05 · 7 answers · asked by paulbearer666200 2 in Other - Science

2006-10-15 15:05:53 · 4 answers · asked by Anonymous in Physics

You often here that light from other galaxies travelled 100 light years or a million light years.

How do they figure out how old light is that reaches earth?

2006-10-15 15:03:54 · 5 answers · asked by Anonymous in Astronomy & Space

Does anyone know of a food that has chemicals or minerals in it that can be found in the periodic table?

2006-10-15 15:03:23 · 3 answers · asked by Jose 1 in Other - Science

I'd really like to introduce my kids (under 7) to astronomy. Each time they look at the sky, they always ask what constellations I see.

I always show them the dipper and Orions belt.

Other then those two, I really can't spot any others. I was given a book on astronomy which shows all the constellations as well as the myth behind them.

However, I do find it very hard to locate them.

Are there any tips to assist? Are there any pc programs available that could be configured for the city you live in that would show the various constellations for a given day and time from our location.

Any other tips would be greatly appreciated.

Thank you

2006-10-15 15:01:28 · 7 answers · asked by Anonymous in Astronomy & Space

Ok. The foundation of a house is in the shape of 2 adjacent squares (note:these squares are stuck together at the side, but are different sizes). The perimeter of the foundation is 80m and the area is 325m^2. Find the length of a side of each square.

2006-10-15 14:59:18 · 8 answers · asked by ۝₪ڠYiffniff ڠ₪۝ 5 in Mathematics

Wouldn't the water dilute the acid and make it homogeneous? How is our body able to absorb only the water?

2006-10-15 14:57:58 · 4 answers · asked by JetAlone 2 in Biology

2006-10-15 14:56:25 · 1 answers · asked by Shushan A 2 in Biology

2006-10-15 14:54:33 · 10 answers · asked by Star911 1 in Physics