Physics - May 2007

Do atoms age? And if so , is there anything smaller than an atom besides a quark. If atoms don't age, then does time exist? Im wondering if there is a "base unit" to all things that is ageless. Becuse if so it would greatly help my set of beliefs on the existance of the univers and time.

2007-05-20 19:41:55 · 8 answers · asked by Anonymous

The 100 gallons of water is distilled, is at room temperature, is closed off from the atmosphere, and is purged of disolved O2 and CO2 gases. It is then converted to hydrogen (H2) and Oxygen (O2) with electrolysis. The hydrogen and oxygen gases are then allowed to return to room temperature and are held in containers that are large enough to hold the gases at atmospheric pressure (15psi). I know that the hydrogen tank will have to be twice as big as the oxygen tank. I then have two questions. 1st, how big are the hydrogen and oxygen tanks in cubic feet? And 2nd, if the hydrogen and oxygen are burned, the heat removed, and then condensed back into the original water tank to room temperature in a system closed off from the atmosphere, what is the amount of energy in joules? Another words how much chemical energy was stored in the seperated hydrogen and oxygen? I am sorry for the english units in this problem. I am ignoring the energy required for electrolysis. Thanks for help.

2007-05-20 19:41:05 · 3 answers · asked by Anonymous

A 6.50 cm pencil is placed upright at a distance 54.0 cm away from the center of a convex mirror. The mirror's radius of curvature is 45.0 cm. Calculate the image distance.
What is the magnification?

2007-05-20 19:37:00 · 5 answers · asked by Fanjame 1

I started wondering after reading the bottom part of the first answer here

http://answers.yahoo.com/question/index;_ylt=Am6EuVGKzzy.qtbmH5E6xPzsy6IX?qid=20070520224622AACukLL&show=7#profile-info-YiGCSOF7aa

2007-05-20 19:25:32 · 8 answers · asked by Raien 3

A ball falls vertically onto a fixed incline, and immediately after impact moves horizontally. If the coefficient of restitution is 0.77, what is the angle of the incline??

2007-05-20 19:20:39 · 1 answers · asked by ivan a 1

Which of the following are electrically neutral?

(For 100 points.)
A) neutron

B) proton

C) electron

D) all of these

E) none of these

2007-05-20 18:50:16 · 4 answers · asked by GC8 1

i got 1 terminal of a voltmeter close to the tv screen and earthed the other...it shows a max of .9 v.....that too when i move the needle on the TV screen.....if i keep it at 1 position....it ultimately becomes 0....got any reasons why??

2007-05-20 18:46:07 · 5 answers · asked by Anonymous

2007-05-20 18:45:41 · 3 answers · asked by shah k 1

prove R=2F in a concave mirror.
r = radius of curvature , f = focal length

2007-05-20 18:36:37 · 4 answers · asked by Prashanth G 1

2007-05-20 18:36:33 · 3 answers · asked by Rajeev r 1

How Did Einstein Arrive At This Equation

2007-05-20 18:34:44 · 4 answers · asked by Anonymous

2007-05-20 18:11:24 · 10 answers · asked by reenu 1

2007-05-20 17:40:37 · 7 answers · asked by cumuliform 2

I realize that the aerodynamics (or fluid dynamics) of the engineered blades are ideal -- proven through rigorous testing and re-design. But if all of this development and high tech materials make the blades so expensive that we can only put three to a rotor then maybe all of that R&D is wasted time and money. Why couldn't we just make rotors with many uncomplicated and cheep sheet metal blades. The greater number of blades would guarantee that more energy was harnessed in light winds and the pitch of these blades could be rotated in high winds so that they didn't rev at too high an RPM for the dynamo to make efficient energy. It just seems to me that with greater surface area comes greater harnessing of the wind's potential energy. I know that more blades create more drag but wouldn't that be cancelled out by the greater amount of wind energy harnessed and therefore the more electricity produced

2007-05-20 17:06:43 · 3 answers · asked by Anonymous

What is the phenomenon called where (generally in car commercials) tires that are spinning forward look like they're spinning in the opposite direction? What speed is this acheived at?

2007-05-20 16:54:46 · 9 answers · asked by JordanMR 2

A. THE PERSONS GRAVITATIONAL FORCE
B. EARTH'S GRAVITATIONAL FORCE

2007-05-20 16:05:05 · 10 answers · asked by sheba40 1

A philosophical question that should have an answer based on physics and our human experience. Simple question, but somehow I find it's hard for everyone to answer. According to relativity, the notion of time is closely related to gravity, the only force we know of that is effective on all scales. Clearly a phenomena that deserves close attention in the study of physics.

What is the role of consciousness in time? How big is time, and how can we define a beggining or an end? (ex: what happened before the big bang?)

2007-05-20 16:03:04 · 11 answers · asked by Weakest 2

It has to be either A. The person's gravitational force or B. the Earth's gravitational force

2007-05-20 15:34:37 · 16 answers · asked by sheba40 1

First Law: Matter is neither created nor destroyed.
Second Law: Entropy law.
(And explain that please, in brief and easy words, because I'm just curious, it's not a homework or anything).
---Please answer based on SCIENTIFIC studies ONLY.
Thanks

2007-05-20 15:14:27 · 7 answers · asked by Anonymous

Two identical observers are viewing a stop watch traveling at the speed of light from a distant star. One viewer is using the naked eye the other a high power telescope. What would each of the viewers say the stopwatch reads. (is there a difference?)

would it be a tiny difference relative to the length of the telescope or would you be able to see further into space faster with the telescope???

my brain is going to explode!

2007-05-20 15:09:25 · 6 answers · asked by someone 5

I'm trying to run some experiments, and I'm looking for some good solutions: anyone know of a good way to store sound into energy? And by good I mean simple, I don't have much of a lab and I'm just 15. I basically want to capture sound waves from a target and convert the vibrations to energy, say to just power a lamp for now.

2007-05-20 15:08:01 · 2 answers · asked by AggressiveNapkin 2

2007-05-20 14:43:20 · 6 answers · asked by joncollins222 3

2007-05-20 14:42:50 · 7 answers · asked by joncollins222 3

i have a physics final tomorrow...other answers i cant find:
what is heat?
what is specific heat
what determines specific heat
" " thermal conductivity
what is heat of vaporization?
what is heat of fusion?
what happens when the velocity of a gas decreases?
- if 40 liters of a gas are cooled to 97 degrees kelvin at a constant pressure, and the starting temp of the gas was 86 deg kelv- what is the new volume (and how do you do that problem??)

THANK YOU SO MUCHHH!!!

2007-05-20 14:34:44 · 3 answers · asked by pennylane 1

2007-05-20 14:27:08 · 6 answers · asked by Chrestos 1

is the water pressure at the bottom of a cylinder tank full of water more than the water pressure at the bottom of an upsidedown cone tank full of water??

2007-05-20 14:12:33 · 4 answers · asked by Anonymous

I know it is made of 2 UP Quarks, 1 DOWN Quark and 8 Gluons holding them together in a volume of about 1 trillionth of a millimeter across. But exactly how are these particles arranged?

2007-05-20 14:09:22 · 1 answers · asked by beboe007 1

2007-05-20 13:33:29 · 3 answers · asked by Anonymous

would it break a person's back
even if they were riding in a car and their car hit the ground with that much force??

2007-05-20 13:17:19 · 2 answers · asked by me 1

What is the purpose of looking into alternative energy sources?

2007-05-20 12:54:46 · 6 answers · asked by Anonymous