Stable Definition and 277 Threads

Help me out here. I have trouble understanding the concept of a stable wormhole formed by having a black hole on one end, and a "white hole" made of exotic matter at the other end, forming a topological donut linking two regions of sapce. that all sounds great, but a blacj hole is a misnomer...

I just came across a question in another forum regarding the stability of a rather strange system. A huge methane-molecule-like system with the parent star in the place of carbon, and the planets in the place of H atoms (It's actually for a sci-fi story). If the planets moved in the same...

Suppose F and G are c^2 and F_x = F_y = G_x = G_y = 0 at the origin. Must the origin be an asymptotically stable equilibrium point? One more Give an explicit example of a DE with exactly two saddle points and no other equilibria. Anybody? Could I work backwards starting with the...

We have a charge distribution in which all the charges are in equilibrium due to electrostatic forces . Can we prove that none of these charges will be in stable equilibrium ?

weird result http://arxiv.org/abs/hep-th/0602159 Spacetime Structure of an Evaporating Black Hole in Quantum Gravity A.Bonanno, M.Reuter 23 pages, 7 figures MZ-TH/06-04 "The impact of the leading quantum gravity effects on the dynamics of the Hawking evaporation process of a black hole is...

Hi, I'm new to this forum, so I'm sorry if I've posted this in he wrong catergory. Anyway, I'm studying AS physics at the moment and my teacher was giving the class some lessons about the strong nuclear force and electrostatic repulsion of nucleons making the nucleus stable. To get to the...

Leaving all knowledge aside for the moment... There seems to be two stable states for the universe 1. Void. There is no universe because there's no natural phenomena to bring it into existence. 2. An intelligent universe. Here the intelligence has devised a way of bringing itself into...

say I'm givin the potential energy fxn V(r) = Eo [ (a/r)^3 - (a/r) ] Eo a constant After taking the derivatives to find the equilibrium pts and checking for stability we get r = sqrt(3)*a and this pt is stable r = -sqrt(3)*a and this pt is unstable Now let's pose the question...

Determine the location of the first postivve (x>0) stable equilibrium position for V(x) = = Vocos((2pie/lambda)x) eventually you will get sin(2pie/lambda)x) = 0 Is a solution for x pie?

Hello, I am trying to understand why atoms have a tendency to completely fill their valence shell. What force attracts the electrons in the first place and keeps them from flying off. There is very little explianation for this that I know of besides the 'happy' atom. Thanks, Scott

Hey I was wondering... I have been thinking about the various career options before me and I have thought a lot about engineering. I know that the work I would be doing sounds cool at least how it's been described. Yet I want to know somethings before I go further... 1. What aptitudes do...

Given 3- bodies of non-negleble mass, are there stable configurations or not. for example, Will a planet (with non-zero mass) orbiting 1000 au away from two stars 0.1 au apart eventually leave the system if you give it 10^9999999... years; or is the system stable for a truly infinete time...

Hi, i understand that fission breaks apart radioactive atoms into smaller 'slightly more stable' atoms.. and that this process continues until the atoms break down into stable atoms.. i have been wondering if a radioactive atom/isotope once broken down into a stable atom/isotope would...

There are several scientists (including Stephen Hawking) who made calculations about our Galaxy rotation and mass... The only stable Milky Way construct they were able to come up with had to include in it's calculation the so called "Dark Matter" ... As I am a realist I just can take seriously...

Political Perspectives Hello loseyourname (and anyone else interested), I've copied your last entry in the 'Great Tragedies' thread as per my response there so we can continue this discussion: What you write here is very true, loseyourname. I must admit that if I had not grown up in the...

how would you create a stable worm hole and if it is possibele how would you know where it would go to and if you could actualy put something like a remote control car through it.

Hello, I am trying to finish a project that uses 2 motors and 2 wheels of 3in in diameter each to produce an autonomous car (although we know it is not autonomous because I'm stupid) the problem is... the wheels tend to go up a bit and down a bit... is not stable... how can i make the...

I read recently that photons are largely responsible for why matter doesn't collapse in on itself!? For example, the electrons (negatively charged) and protons (positively charged) inside each of the atoms that make up our bodies should ordinarily attract each other and thereby cause us to...

Hi. I have an assignment lying around, in which I have to find numerically stable forms of some expressions. A few still elude me, so I was wondering if someone might have a suggestion. e^{x}-e This has large rounding errors if x is close to 1 sinh (x) - tanh (x) Large...

"completely stable nucleus" question The nucleus of a helium isotope contains 2 protons. I have just worked out the magnitudes of the electrostatic force and the gravitational attraction between the 2 protons. The question now reads "the nucleus is completely stable. Considering the...

Do stable particles exist in any of the accepted theories such as string, Qm, GR or any others?

Why is the half-life of a proton, what it is? Can any branch of Mathematics or Physics explain it or predict it. I have asked myself these very same questions many times before. We are closer to finding, a tachyon than a proton-decay. Not that I am complaining since proton decay...

Hi I've been reading websites about particle physics recently, and in some places they say the proton is stable and others they say it is unstable, with a half life of 10 to the power of 32 years. I know it is the most stable baryon. The only possible decay I've read about is a proton...

I was always thinking that the mitochondrial genomes are very stable, but now I am reading that they have an unusually high rate of mutation, which may contribute to many of the medical problems of old age. So which is true maybe it's that mitochondria are passed down from mother to child...

Is it possible for this to happen? As far as I know the only way to change elements into other elements is through radioactive decay, and fusion and fission yeah yeah. But I also know that elements with atomic numbers higher then lead's tend to decay into lead and just kind of stop there...

Howdy, first post, good to be here. I'm sure it will be a learning experience. My question concerns planetary formation and planet orbits for other stars, specifically the star Vega. I'm having a "disagreement" with someone who claims that Vega's mass, diameter, and density prevents the...

Greetings ! I have a little question. My teacher was talking about stable ions some days ago, he wanted to explain why do we have certain stable ions in ionic compounds and we don't have other ions. For example, we notice that the stable ion of Na (in its compunds) is Na+1 and not Na+2 or...