Physics - August 2006

2006-08-03 00:03:35 · 8 answers · asked by Anonymous

I work in disaster management in Red ross of Greece and I am trying to collect info regardin the potential hazard of the Thera Volcano for the next decades

2006-08-02 23:58:01 · 2 answers · asked by kyrkanellos 1

2006-08-02 23:22:09 · 19 answers · asked by nelemiakah2 1

2006-08-02 22:59:42 · 3 answers · asked by dhamodharan s 1

For a isolated system dQ=0 and dW=0. According to the first two laws of thermodynamics the energy of universe is constant and entropy only increases. But according to the most recent universe models, our is not isolated but a “bubble” in other universes, from which we could consider our universe not to be an isolated system.

2006-08-02 22:23:44 · 3 answers · asked by ascaniosobrero 3

Black holes, white holes, worm holes

2006-08-02 21:33:34 · 4 answers · asked by Anonymous

Agreed that they are two different systems of units, but I need to know what should be used as a constant or multiplier to convert them. I need that formula. If specific density is involved, then can anyone suggest where on Net can I find the specific density of fluids?

2006-08-02 20:18:10 · 11 answers · asked by abhidgr8 1

2006-08-02 20:15:24 · 2 answers · asked by Bob 2

2006-08-02 19:50:37 · 9 answers · asked by Anonymous

In regard to nuclear power,weapons etc.

2006-08-02 18:27:41 · 7 answers · asked by Shag 2

Give reason also

2006-08-02 18:15:20 · 5 answers · asked by POONAM W 1

I'm posting here instead of the religion category, hoping to find more thoughtful answers. Personally, I don't believe in any God(s), but many people do. I am guessing that you must assume God is timeless, due to the nature of the being, so S/He is not part of our Universe. Do you have any ideas as to how you could go about proving that God exists using any current theories in Cosmology, such as Multiverses, String Theory, M-Theory, etc?

2006-08-02 17:58:11 · 11 answers · asked by powhound 7

2006-08-02 17:41:22 · 12 answers · asked by negusseakberom 1

Or is it a human created phenomena?

2006-08-02 17:27:26 · 18 answers · asked by Mr. Politics 2

Why couldn't both space and time be multidimensional? Isn't calling time the fourth dimension arbitrary. What if space and time were subsets of dimensions? Couldn't some of the time-travelling paradoxes be done away with if we looked at time not linearally but planar. Several timelines could set next to each other if we stacked them up on a second axis of time, right? Or wrong?

2006-08-02 16:45:24 · 7 answers · asked by pharis81 1

2006-08-02 15:54:37 · 14 answers · asked by Larry S 1

this is a test for the yahoo community. if you drop a bullet from your hand at the same time as you shoot a bullet in a perfectly horizontal direction. they should hit the ground at the exact same time but they dont. the first one to tell me why it is that logically they should hit the ground together but dont in real life wins ten points.

2006-08-02 15:53:47 · 9 answers · asked by Anonymous

The reason why people don't fall to the gorund is because of the gravity force or is it because of the speed at which our planet spins around? Or. is there any other reason?

2006-08-02 15:27:44 · 14 answers · asked by Anonymous

Assuming everything has a beginning and ending, there must have been something before the Big Bang.

2006-08-02 15:13:03 · 51 answers · asked by Anonymous

I've seen some NOVA shows, but I'd like to read something extremely basic. I have no science training beyond high school; I am an MBA (no Bush jokes, please). What should I read to better understand this fascinating field?

2006-08-02 15:07:02 · 8 answers · asked by Suit of Flames 2

It seems like moving forward would just be another factor making balancing more difficult.

2006-08-02 14:52:35 · 7 answers · asked by The Ghetto David Hume 3

and 60 minutes 1 hour? WHY 60?

2006-08-02 14:49:24 · 9 answers · asked by Anonymous

Common answers to this question are:

1. The Nitrogen difuses through the tire casing more slowly than oxygen because the N2 molecule is larger, and

2. Nitrogen pressure is more consistent than normal air pressure, because air typically contains varying amounts of moisture due to changes in the relative humidity. Water causes air to be inconsistent in its rate of expansion and contraction.

My thermal physics is a bit rusty, but I don't buy either explaination. As for reason one, N2 should be a smaller molecule than O2, 2H2O2, CO2, or other common O2 molecules found in air & therefore should difuse through the tire more rapidly.

Second, PV=NRT should apply to this problem, with N,R and V remaining virtually constant so P should vary only with T.

I'm just a tire geek who forgot most of what Leon Lederman taught him at Fermi Lab. Is there a physics geek out there who can answer this question scientifically?

Thanx

www.cartalk.com/content/columns/Archive/1997/September/05.html

2006-08-02 14:35:02 · 6 answers · asked by smleffler 1

I never figured this out. When you cook something, it's steaming a little bit. But as soon as you turn off the heat, it makes a lot more steam. Anyone ever notice that? Anyone know why?

2006-08-02 13:56:31 · 3 answers · asked by Ken J 3

If yellow light can be made from a mixture of red and green lights, how does the brain interpret this as yellow? Can we percieve photons intermediate in energy between red and green, and if so, how? In other words, is there a difference between 'pure' yellow, and mixed red and green?

2006-08-02 13:13:42 · 4 answers · asked by algolthedemonstar 1

2006-08-02 13:09:20 · 1 answers · asked by goring 6

I'll work on an interdisciplinary project consisting in modeling the behavior of a microdrop on a given substrate. Since I have a Computer Science background, I need to acquire some background on the other side of the problem. Do you know some literature that I should read ? Or even better, have some hints about the way of modeling a microdrop's behavior ?

2006-08-02 12:55:43 · 1 answers · asked by zircO 1

fossil fuel generate a lot of pollution matter , how about nuclear power

2006-08-02 12:52:37 · 9 answers · asked by Anonymous

If light's relative time stopped then shouldn't it be everywhere at the same time, yet it take minutes for the sun's light to reach our eyes and several years for other stars like Alpha Centauri. If special relativity is true there would be no need for light years because light would travel at an infinite speed.
P.S. This is the biggest unexplained problem I have with Einstein's theory.

2006-08-02 12:46:27 · 8 answers · asked by Jorfer 2

The phases of water

2006-08-02 12:24:41 · 6 answers · asked by goring 6