Physics - July 2007

2007-07-12 04:59:00 · 3 answers · asked by milwaukee_son 1

2007-07-12 04:53:26 · 8 answers · asked by Anonymous

Math proof that a limited time domain signal is infinite in the frequency domain & a limited band of frequencys signal that is infinite in freq domain, is unlimited in time domain. I suspect Fourier sereis and transforms are involved. Thax in advance.

2007-07-12 04:33:34 · 1 answers · asked by 037 G 6

Let's say I have a plastic container full of liquid, and I want to freeze it instantly or very fast, How can I do this?
I've read that I can do this with nitrogen or CO2. Is this true? Are there laboratories the sell this?
Is this liquid poisonous once it's frozen in CO2 or Nitrogen?

Thanks.

2007-07-12 04:09:35 · 2 answers · asked by Anonymous

I want to collect and store negative ions from the air. All suggestions are welcome.

2007-07-12 03:25:25 · 3 answers · asked by Dr. Frankenstein 1

Ques: sun is emitting 355kw/hr avg. Energy. This energy is to be used to pass current to a system which is under electrolysis. How much of Hydrogen and oxygen is seperated. Hint:-237 kJ of energy is required to make 1M of hydrogen? If u don't get the answer try to write produced instead of seperated

2007-07-12 01:25:24 · 1 answers · asked by kshitij t 1

2007-07-12 00:04:54 · 4 answers · asked by Suvankar D 1

2007-07-11 20:52:57 · 10 answers · asked by cptadam031969 1

2007-07-11 20:17:40 · 7 answers · asked by How To Save A Life 2

If I'm 300 feet from where a firework is launched and I see a perfect circle, if I go to where it was launched, turn 90 degrees and walk 300 feet would I see a circle or verticle line

2007-07-11 19:35:19 · 5 answers · asked by Mr. Dum Dum 1

Can anything other than an observer collapse the quantum wave function?
Can the quantum wave function collapse on it's own?

2007-07-11 19:29:06 · 5 answers · asked by daviddepape 2

I will e-mail the person with the material he must to help me ( Please if you can help me )

2007-07-11 19:10:46 · 1 answers · asked by seksi_mace 1

I'm wondering how powerful my amp is: 180W, 60Hz, 115V.

2007-07-11 17:42:53 · 4 answers · asked by Seb 1

i cant find this anywhere but there has to be something

2007-07-11 17:27:53 · 6 answers · asked by Anonymous

Suppose a cone has a top diameter of 10 meters and is 10 meters high. Suppose you filled it to the brim with fresh water. What would be the pressure of the water at the bottom? Would it be any different to the pressure of water at the bottom of a 10 meter diameter cylinder?

2007-07-11 17:17:04 · 3 answers · asked by submergency 3

We know gravity attracts objects to other objects and we know it's related to mass (the greater the mass the greater the attraction) but we still don't know why or how.

2007-07-11 17:11:40 · 5 answers · asked by Chad 5

making nuclear weapons is NOT a practical use.

2007-07-11 17:07:32 · 6 answers · asked by Anonymous

2007-07-11 17:04:29 · 12 answers · asked by theocurio 2

Does any one have a detailed manuel on how high pressured booster pumps work or know where I can find one? They are used for water.

2007-07-11 17:03:49 · 4 answers · asked by Aaron R 1

2007-07-11 16:59:53 · 2 answers · asked by RHODA D 1

hello I have a family in europe that survives off the land however late someone has been stealing there potatos and i need to find a method to stop this ..they dont have video cameras..Farm) and no land minds would be harsh ..but this is a very serious issue to them as they live off this .. the field is about 1 mile from there house... any ideas... Ps they have tryed stalking the area but this would not be feesable to do all day... warmest regards and thanks for your help ... PPSS...No its not animals stealing there potatoes...a dog would be a good idea to get but they dont have money to sustain a dog.. basic we need a way to catch these guys.. I know its a hard one this is why I am hoping some good minds in yahoo answer would be able to help

2007-07-11 16:42:10 · 3 answers · asked by m k 2

is the particle model of matter theory that if matter/particles are heated then the particles expand and move faster and if the matter/particles are cooled then the particles contract and move slower?

2007-07-11 16:30:53 · 3 answers · asked by whoopedy 2

thanks!

2007-07-11 16:23:34 · 3 answers · asked by Man Who Disproves All 1

Need to know about the particle model of matter timeline (the yr, the person and what they discovered)

also need to know what particle model of matter is

and

about John Dalton's contribution to the particle model of matter theory.

2007-07-11 15:56:32 · 5 answers · asked by whoopedy 2

2007-07-11 15:39:37 · 4 answers · asked by Man Who Disproves All 1

its mass?
A.) the center of gravity lies closer to the source of gravity
B.) the center of gravity lies farther from the source of gravity
C.) both points are the same

2. We know that an object will balance stably if we draw a line stright down from the object's center of mass and the line falls
A.) anywhere outside the object's base
B.) anywhere inside the object's base
C.) only in the center of the object's base
D.) only along the edge of the object's base

3. Which force(s) is(are) associated with rotational motion?
A.) Centrifugal force
B.) centripetal force
C.) both
D.) neither

4.Atoms are
A.) the building blocks of matter
B.) to small to see with the naked eye
C.) the smallest amounts of elements that still retain the chemical properties of the element
D.)all of the above

5.Brownian motion is caused by
A.) Human contact
B.) gravity
C.) invisible particles
D.) heat

2007-07-11 12:58:36 · 5 answers · asked by sagen j 1

*using some kind of beam (like a reverse tractor beam) not rockets

2007-07-11 12:00:49 · 7 answers · asked by jerryalanjr 1

Regarding the typical electromagnetic radiation (EM) produced by a current flowing through a straight power line: What is the wavelength (or frequency if you prefer) of this radiation. Is there a function with the variables being: 1) the distance you are from the actual wire (since the intensity dissipates at a rate proportional to the distance squared) and 2) if necessary, the voltage and wattage of the current. I would assume that the EM is in the form of radio waves (and even possibly slightly higher frequency microwave radiation), but I would like to prove this. My goal is the proof, in the form of a function.

2007-07-11 11:45:06 · 4 answers · asked by slovakmath 3

If you take a laser pointer and point it at the moon and move the laser pointer fast enough across the face of the moon, wouldn't you be able to get the point of light shown on the moon to travel faster than the speed of light across the moon given the distance the moon is from Earth and the time it would take to flick your wrist?

2007-07-11 11:38:52 · 10 answers · asked by Anonymous

2007-07-11 11:21:49 · 6 answers · asked by Anonymous