What is Stable: Definition and 294 Discussions

A stable is a building in which livestock, especially horses, are kept. It most commonly means a building that is divided into separate stalls for individual animals and livestock. There are many different types of stables in use today; the American-style barn, for instance, is a large barn with a door at each end and individual stalls inside or free-standing stables with top and bottom-opening doors. The term "stable" is also used to describe a group of animals kept by one owner, regardless of housing or location.
The exterior design of a stable can vary widely, based on climate, building materials, historical period and cultural styles of architecture. A wide range of building materials can be used, including masonry (bricks or stone), wood and steel. Stables also range widely in size, from a small building housing one or two animals to facilities at agricultural shows or race tracks that can house hundreds of animals.

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  1. Shackleford

    Stable or not stable equilibrium

    Clearly, I need to look at the potential function and differentiate it to determine extreme and then the stability of the extrema. However, I'm not sure how to do this mathematically at the moment. http://i111.photobucket.com/albums/n149/camarolt4z28/2010-09-14203321.jpg?t=1284516380
  2. J

    Stable stranglets of A > 1000?

    So far I've read enough articles to believe that stranglets with a mass of greater than the equivalent of 1000 protons can be stable at ordinary tempertures and pressures. Assuming the strangelet is positively charged, there is no threat to normal matter due to coulumb effects. I've also...
  3. J

    Can the decay process of Nickel-78 be stopped?

    I'm somewhat new here, so forgive me if I ask an inappropriate question (defined as too far out there; this is supposed to be a legitimate site). How could it be possible to make Nickel-78 stable, and still remain Nickel-78? Nickel-78 decays via Beta-minus decay, which means one of its...
  4. J

    Stable nucleons other than Neutrons and Protons?

    Can there be any particle other than a proton or a neutron that can remain stably in the nucleus of an atom at ordinary temperatures and pressures? I'm aware of hypernuclei (nuclei containing hyperons) but none of those are stable. I understand that they all decay weakly. Is there any...
  5. stevebd1

    What is the equation for stable orbits in Kerr metric?

    The equation for the surface gravity of a black hole in Kerr metric is- \kappa_\pm=\frac{r_\pm-r_\mp}{2(r_\pm^2+a^2)} where r+ is the outer event horizon- r_+=M+\sqrt(M^2-a^2), r- is the inner event horizon- r_-=M-\sqrt(M^2-a^2) and a is the spin parameter in metres- a=J/mc. An exact...
  6. M

    Periodic orbit of Hamiltonian dynamical system in R^2 is stable

    Homework Statement We are given a Hamiltonian dynamical system with a smooth Hamiltonian H:\mathbb{R}^2\to\mathbb{R} on \mathbb{R}^2, with canonical symplectic structure. Suppose this Hamiltonian has a periodic orbit H^{-1}(h_0). Prove that there exists an \epsilon>0 such that for all h\in...
  7. N

    Is the Electron the Smallest Stable Particle?

    Is an electron the smallest stable subatomic particle? By stable I mean it can exist independently of other particles.
  8. T

    Can you be in stable orbit inside a blcak hole?

    If you are in free fall inside a black hole, shouldn't it feel like normal space even though people on Earth saw you enter a black hole?
  9. T

    Holding current for stable plasma

    I'm interested in building a plasma loudspeaker using a 1kW amplitude modulated RF amplifier. The amplifier will modulate the output of a 27Mhz RLC circuit which is connected in series between two Tungsten electrodes (opposite polarity). I believe if a potential of 30kV/cm is placed between...
  10. D

    Curvatue Cosmology for a static stable universe

    Curvature Cosmology is a cosmology based on two hypotheses. The first, curvature redshift, is an interaction between photons and curved spacetime and produces the observed Hubble redshift. It can also explain the anomalous Pioneer 10 acceleration. The second, curvature pressure, is a...
  11. H

    Stable Nuclei present during Homogeneous Nucleation

    Homework Statement Assume for the solidification of nickel that nucleation is homogeneous, and the number of stable nuclei is 10^6 nuclei per cubic meter. Calculate the critical radius and the number of stable nuclei that exist at the following degrees of supercooling: 200 K and 300 K...
  12. V

    Most stable nuclei are magnetic

    Hi, I'm in my last year of school and part of my A-Level is on nuclear physics. We've recently studied binding energy and I noticed that the elements with the highest binding energy per nucleon (the most stable nuclei) are magnetic - iron, cobalt and nickel. Are binding energy and magnetism...
  13. S

    Conservation of ME and stable orbit

    Imagine a planet in elliptical orbit around a star, without any perturbation from third bodies and moving in perfect vacuum. The only force acting in the system is gravity. As the planet gets closer to the star, gravity acts in the direction of its motion, so it gains speed and KE but loses...
  14. B

    Will My DIY Pipe Shelving Be Stable Enough?

    I plan on building shelving using 3/4" pipe and fittings. The general design is a 2 shelf system -180 degrees from each other around a center pole at different heights. I plan on bolting the center pole to a plywood base. Each shelf will hold between 5 and 100 lbs. I want to make sure its...
  15. J

    How do helicopters remain stable, despite the potential for tipping over?

    I just realized couple of days ago that I had never known why helicopters were stable, and avoided tipping over. When you look at a helicopter, it creates an intuitive impression that it is stable, because the center of mass is below the rotor. It seems as if it the helicopter's body is hanging...
  16. R

    Satellite moving in a stable circular orbit

    Homework Statement A 600kg satellite moving in a stable circular orbit about the Earth at a height of 4000km (G=6.67x10^-11 NM^2/kg^2, Re=6380km, Me=5.98x10^24kg). Calculate the speed of the satellite at that height. Calculate the orbital period (T), the time for one revolution Calculate...
  17. D

    Understanding Particle Motion and Stable Equilibrium in a Potential Energy Graph

    im so lost with this question, i have tried a lot and cannot solve it : A particle of unit mass moves on a straight line under a force having potential energy V (x) = x3=(x^4 + a^4) where  and a are positive constants. Sketch the graph of V (x). (a) Find the period of small oscillations...
  18. D

    Designing a Stable Crane: Finding Reactions & Max Load

    Homework Statement I'm to design a crane, and therefore I need to find the reactions in the jib and also make the crane stable. 1. I need to find the max. load that the crane is able to lift. Therefore i have to find the reactions where the horisontal and vertical boom is meeting. 2. I need...
  19. stevebd1

    Kerr Black Hole & Keplerian Stable Orbit

    The following is the equation for a Keplerian stable orbit at the equator around a Kerr black hole- \tag{1}v_s=\frac{\pm\sqrt{M}(r^2\mp2a\sqrt{Mr}+a^2 )}{\sqrt{\Delta}(r^{3/2}\pm a\sqrt{M})} where M=Gm/c^2,\ a=J/mc and \Delta=r^2-2Mr+a^2 which for a static black hole would reduce to -...
  20. M

    Choose those statements that are true for the most stable resonance structure

    Dont have to be mean?
  21. W

    Stable Magnet Energy What's their source?

    I've been trying to find the answer to a question i have online but haven't had much luck. Where did Stable or Pertinent magnets get their energy from? I've read plenty of people saying "magnets don't acquire or release energy" but that doesn't make sense to me. Let's use this scenario...
  22. D

    Organic Chemistry stable conformation question

    1. In the chair conformation, why would 1-bromo-tetrahydropyran be more stable in the axial position, as opposed to the equitorial position? (Hint: consider how the bromo group affects the attached carbon and what the oxygen could do to alleviate that.) 2. No relevant equations 3...
  23. S

    How much mass does it take before photons will have a stable orbit?

    This is my first post so I hope I'm putting it in the right section :redface: I searched for similar questions but could not find one. Edington preformed his experiment where he observed the bending of light around the sun due to gravity. I have been thinking this past weekend about a...
  24. K

    Engineering How stable of a field is Electrical Engineering?

    I've talked to some friends in the field and heard a slew of different things. I was wondering what you guys think about how much job security is offered, and I've heard that engineering is a high demand job - is this true even with the current economy?
  25. B

    Any Progress in Stable Economics?

    Just a thing I have been mulling over in my head lately has been the thoughts of stable economics (not reactionary Keynsian economics that the government has been employing)... it seems with all of the smart people in the US and around the globe we are still nowhere near a 'stable' economic...
  26. F

    Can Softening Length Affect Dark Matter Halo Stability in N-Body Simulations?

    Hello I try to get stable dark matter halos with n-body simulations. I set up the halo following a NFW-profile and I define the velocity distribution with a Gauss distribution or Edington inversion (the result is the same). After approximately 2Gyr my cusp turns into a core...?? I use about...
  27. R

    Seeking Stable Orbit: Investigating a Rigid Pole in Space

    Here's a thought that was bugging me last night: Lets say you placed a very long rigid pole (jokes kept to a minimum please) into orbit so that one end (end #1) faced the center of the earth, and the other (end #2) pointed out into space (So that the center of the Earth and all the points on...
  28. 3

    Combining Stable Nuclides to Form Unstable Nuclides

    Hello Is it possible to combine two more stable nuclides to form unstable nuclides? like for example combine Xe and Sr and form U In fission it is like U + n -> Xe + Sr + n can we reverse this process? if one doesn't care about the cost effectiveness Thankyou
  29. H

    The commercial toy, Levitron, can achieve stable magnetic levitation

    The commercial toy, Levitron, can achieve stable magnetic levitation due to gyroscopic stabilization and axis precesion. The Levitron toy sold in market has a vertical spinning axis, and so far I have not found a variation with horizontal axis. Is it allowed in Earnshaw's theorem, for a...
  30. H

    Stable Blackhole: Radius Dependence

    If a stable BH exists?. By stable I mean not growing and not shrinking. How then does its radius depend on a homogenious (or inhomogenious?) density outside this BH? I suppose its radius is then anyhow larger than its Schwarzschild radius.
  31. Simfish

    Why are objects with higher center of mass less stable?

    Is it because less force (from, say, potential objects that could tip the object) is required to exert the same amount of torque on objects with higher center of mass?
  32. A

    Can a stable nucleus ever spontaneously become (temporarily) unstable?

    Hi folks, I have what might be a naive question about the decay of unstable nuclei. I've recently been reading about various decay processes (e.g. beta decay, electron capture etc.). Specifically, I'm wondering if it is ever possible for a stable nucleus (say, carbon-12 or any other...
  33. G

    Stable orbitals/absorption spectrum

    calculating the stable orbitals for multielectron atoms is so complex that AFAIK it can't be done accurately. so how does the electron in the ground state 'know' that if it jumps to a certain energy level that it will be stable? (which it apparently does know since it 'knows' exactly what...
  34. M

    Stable Lame Career Vs. The Unknown

    So I'm an older guy, not horribly old but old enough that I should know "what I want to be when I grow up". I have a B.S. in Computer Science and work in the Consulting industry as an Environmental Consultant. My current job is decent, most people wouldn't complain. I get to travel on the...
  35. A

    Top 5 most stable, well-paying careers in the future?

    Hi, can anyone provide their list of what they believe will be the top 5? Regards
  36. S

    Thermaldynamically or kinetically stable?

    hi I have a question about thermodynamic and kinetic stabiliy. for the general materials we can calculate the free energy and k for evaluation of thermaldynamical and kinetical stabiliy. however, for some strange compond, it is impossible to find the enthalpy and entropy to calculate the fre...
  37. B

    Exploring the Possibility of a Stable Black Hole

    If a black hole really does have hawking radiation can in theory the black hole be stable. What I mean by this is that the hawking radiation output is in equilibrium with mass that we could feed a black hole. It seems to be self explanatory and if the large hadron collider could create a mini...
  38. S

    Stable Knots in 4D: Proof and Directionality

    I've seen the statement repeated in many places that a stable knot comprising 1D curves cannot be created in 4D, since it's always possible to untie the knot by moving in the 4th dimension (whereas it is possible to create a stable knot in 4D using 2D surfaces). Can anyone point me to an...
  39. M

    Short vs Tall: How Centre of Gravity Affects Stability in Individuals

    Assuming that all other conditions are the same, is a short person more stable than a tall person? Is the centre of gravity lower for a short person?
  40. I

    Safe Planetary Distances: Exploring the Limits of Orbital Stability

    Just curious as to how someone may determine what orbital distances are "safe" or "stable" for planetary interactions? or How close could two planetary bodies get before the gravity interaction destroys one or the other? i.e. Jupiter's Io's orbit places it close to Jupiter, and most of...
  41. P

    Wether a point is stable unstable or other

    got a question Xn+1=X2n-4Xn+6 so from there we play arround with Xs and get roots of Xs =2 or 3 then we sub that into F'(x) giving answers of 2therefore unstable and 0therefore stable i understand all of the question apart from the stable and unstable part could someone please tell me why...
  42. S

    Equilibrium of Charged Beads on a Rod

    Homework Statement Two small beads having positive charges 3q and q are fixed at opposite ends of a horizontal, insulating rod, extending from the origin to the point x = d. A third small, charged bead between the two is free to slide on the rod. At what position is the third bead in...
  43. S

    Calculate Satellite Velocity in Stable Orbit

    Q.Calculate the velocity of a satellite moving in a stable circular orbit around the Earth at a height of 5200km. A. I wasn't sure which formula to use on this problem is it Ac=(V^2)/r
  44. R

    Discover the Most Stable Structure and Learn Why It Stands Strong

    Most stable structure ?? Hi Could anyone tell me which/what is the most stable structure? And Why?? Thanks a lot
  45. M

    Which compound is LESS stable?

    below are two simple compounds. this is from a first semester general chemistry test and there were four compounds total all with the same number of C H and O we had to tell which one was least stable and why. I don't remember the other two because both had a formal charge of 0 on everything...
  46. J

    Exploring the Stable State of Noble Gases

    Hi, I am a student currently engaged in AP Physics B and AP Physics C, and I am curious as to why it is that most of the Noble Gases exhibit and exist in such a stable state. In AP Chem last year I learned that having a configuration in which the valence shell of an atom has eight electrons...
  47. R

    Engineering Is Civil engineering a stable career path ?

    I have read it is highly cyclical I have also heard that it is very stable. Is Civil Engineering a stable career ?
  48. P

    Making a stable thermal gradient w/ copper wire?

    Hi all, Biologist posting here. We have a thermal gradient that doesn't seem very stable. Right now, our setup is the following: hot water runs through one aluminum bar and cold water runs through another. the two bars are about 25cm apart. There is a thin aluminum plate resting on the...
  49. B

    Is it possible for a stable system

    to spontaneously develop an instability, i.e. without some external force acting on it?
  50. J

    What Happens When a Group Leaves a Subset of a Countably Infinite Set Stable?

    If G\subset \textrm{End}(V), and W\subset V is a subspace of a vector space V, and somebody says "G leaves W stable", does it mean GW=W or GW\subset W or something else?
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