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. A

    Can an Antiproton Replace an Electron in a Heavy Atom and Create a Stable Atom?

    Is it possible to replace one of the electrons in a heavy atom like uranium with an Antiproton and form a stable atom?
  2. R

    Stable equilibium of a potential

    Homework Statement A particle of mass moving in one dimension has potential energy ##U(x)=U_0[2(x/a)^2-(x/a)^4]##, where #U_0# and ##a## are positive constants. (i)What is the angular frequency ##w## of oscillations about the point of stable equilibrium? (ii)What is the minimum speed the...
  3. P

    Graphene How it contradicts 2D models and how can it remain stable.

    Hi guys, I am currently writing my dissertation on Graphene and I am investigateing how graphene remains stable, contradicting existing well established theory which states 2D materials cannot exist independently. With the main area of investigation looking at possible lattice distortions...
  4. D

    Any books/articles for evolutionary stable strategy models in humans?

    I'm halfway through the Selfish Gene, and was intrigued by his talk of strategies. Are there any good books that talk about this development in human behavior?
  5. L

    Determining if a discrete signal is BIBO stable

    Homework Statement Homework Equations BIBO stability requires, for every input, that the system output y(n) is: |y(n)| ≤ By < ∞ Linear time invariant systems are BIBO stable when: Summation from -∞ to ∞ |h(n)| ≤ Bn < ∞ The Attempt at a Solution For part a, I got the...
  6. L

    Is the surface tension of a liquid droplet stable?

    Hi all, Typically, we know that the surface tension for water is about 72mN/m at RT. so do this mean that the surface tension over the whole droplet is exactly the same? Moreover, we know that the Laplace pressure may be different over the whole droplet as the curvature in different parts...
  7. B

    When do they emit α, β+ or β- particle to become more stable?

    When do they emit α, β+ or β- particle to become more stable? From what I've seen in the textbook, β- is emitted when there is an excess neutrons and β+ is emitted when there is a short of neutrons. Then when does an α-particle emitted?
  8. D

    How does a rocket stay stable during liftoff?

    Because torque is force times distance, wouldn't it only take a relatively small force to make a rocket unstable if the force was applied near the base or the top? How is it kept stable? I just saw SpaceX's future plans to make a fully recyclable launch vehicle; I think it is far fetched TBH.
  9. B

    Are thermalized neutrinos stable at temperatures their rest energy?

    At the last scattering surface (LSS), the energy density of neutrinos is argued to be ~0.68 of the energy density of blackbody photons, based on a thermodynamic equilibrium argument. This is also required to obtain the correct total energy density for stable expansion. At that time, the average...
  10. P

    Is the glueball the only stable physical particle in pure Yang-Mills theory?

    By "physical particle" I mean color-singlet particles which have asymptotic T=\pm \infty states. How many stable particles exist in the theory? Only one? SU(2), SU(3), and SU(N) gauge groups can all be discussed.
  11. L

    Show that the atmosphere is neutrally stable

    Homework Statement Assume that the atmosphere is dry, and that its temperature profile may be approximated by a linear function in height using a constant lapse rate: T = T_0 - \gammaZwhere T_0 is the ground temperature. Also assume that the pressure can be approximated the following...
  12. J

    Why is diatomic oxygen such a powerful oxidising agent if it is stable?

    I am very confused - any electrons added to dioxygen must inhabit an anti-bonding molecular orbital which leads to destabilisation of the molecule. So why is dioxygen such a powerful oxidising agent? I need to understand this to try and figure out why nitrogen monoxide is readily oxidised by...
  13. T

    Is left side of the s-plane stable side?

    Laplace transform includes exp(-st) and s=σ+jω. σ is negative in the left side and hence exp(-st) goes to infinity. It is not stable. Where am I wrong?
  14. I

    How do I know if this discrete-time system is stable?

    Homework Statement Given the following system: s[n] = (\frac{1}{4})^{n}u[n+10]u[n] Prove if this is a stable or unstable system. Homework Equations The Attempt at a Solution I know that in order for a system to be stable, the input must be bounded in order for the output...
  15. R

    How to keep stable temperature inside an iron container of mm thin

    Can some one give me ideas that how can we do above question.
  16. D

    Fork in the road redux: Leave a stable job, for an unstable job?

    Hello again. In the first fork in the road thread I outlined some problems that I am dealing with, and you kind folks offered many suggestions. The 3 big ones that I can remember without looking are: 1) Find roommate. 2) Join Military 3) Work multiple jobs and save up more money. I...
  17. B

    How to calculate if a vertical beam is stable under a particular load?

    What all the parameters to be calculated to find a vertical standing beam subjected to axial loading stands without buckling or stands stable? My HW problem has a theoretical question, a vertical beam is fixed on both ends. Loaded on the top with axial load. Show that with an example...
  18. B

    Understanding Decay in Stable Nuclei: How and Why It Occurs

    Is stable nuclei decay? if no then how and why know please ans me i am waiting
  19. G

    Engineering How stable is Aerospace Engineering? What about Mechanical Engineering?

    Which one is more stable? I heard that Aerospace Engineers get hired for a job, then get fired. I'm going to be a junior in High School next year and I'm thinking about what I want to be. Thanks!
  20. T

    Can There Be a Stable Figure-Eight Orbit Between Earth and the Moon?

    Hello! I don't know if this is in the right place or not. So if it's not, I won't misplace it in the future. Anyway, I was recently thinking about the orbits of planets around Binary Stars, and was wondering if it's possible to have a similar orbit around the Earth and the Moon. Have a...
  21. C

    Radioactive Decay: Are stable elements really stable?

    Ok, so all elements undergo radioactive decay. But why? I have been snooping around and what i find is that radioactive decay occurs because of instability of the atom nucleus in quantity, proton-neutron ratio and energy content; therefore we have alpha, beta and gamma decay consecutively...
  22. M

    Can a star with a black hole core be stable?

    If a small black hole were to fall into a star or brown dwarf, presumably it would initiate accretion and fusion in a shell around it. Can such an object be stable over any decent timescale, or would it undergo variability/significant mass loss/supernova?
  23. C

    ?How to know if equilibrium points are stable or not. Is my solution correct

    ?How to know if equilibrium points are stable or not. Is my solution correct Homework Statement Homework Equations The Attempt at a Solution solution above
  24. O

    What nuclei are stable against beta decay?

    I know odd-odd nuclei are generally unstable against beta decay as the pairing term in the semi-empirical mass formula is less than zero, and I know even-even nuclei are generally stable, but I don't get the rules you apply for even-odd or odd-even nuclei. Do you have to work out the binding...
  25. C

    Stable orbits for hot Jupiters?

    Would it seem reasonable that so-called ‘hot jupiters’ are in resonance i.e. have a stable orbit? If one utilized our stellar system as a simulation, with the addition of a hot jupiter, then what would the resonance be? Would it be calculated as non integral? Then if our cold gas giant were...
  26. S

    Finding stable equilibrium

    A one-dimensional force F(x)=(3.0N/sqrt(m))*sqrt(x)-(1.0N/m)x acts on an object of mass m = 2.57kg. a Find the position x0 where the mass is at a stable equilibrium. b Find the frequency of small oscillations around that equilibrium position. How does this compare to the frequency if we...
  27. J

    Find Stable Equilibrium for Mass m=5.34Kg w/ Force F(x)

    I have a object of mass m=5.34Kg. There is a force acting on the object F(x)=(5.0N/m[1][/2])*(x[1][/2])-(1.0N/m)*(x). 1)I need to find the position x0 where the mass is in a condition of stable equilibrium. 2)What is the frequency of oscillation around this position? How would this frequency...
  28. E

    Why is S-Ethyl 3-hydroxybutanoate SO MUCH more stable than its R enantiomer?

    The boiling point for R-ethyl 3-hyrdoxybutanoate is about 75 C The boiling point for S-ethyl 3-hyrdoxybutanoate is about 180 C How!? How is the same molecule that much more stable just by rearrangement of the hydroxy group. I'm trying to explain how some R enantiomer may boil off along with...
  29. D

    Critically Stable - Control Theory

    I am preparing for my control theory exam, but I have come across that I am struggling. I have a third order system and its asking to me determine when a value of an adjustable parameter, K for when the system is critically stable. I just don't know what this corresponds two for a third order...
  30. K

    Which is more stable Fe2+ or Fe3+?

    I understand that Iron3+ has a half filled 3-d level, but I also know that in reality when one electron is lost from elemental iron, the lone pair from the 3-d level will move to the 4s level to stablelize it. What I really want to know is which ion is more abundant in nature? Thanks guys
  31. R

    How to create stable mini black hole

    Hi, What would it take to produce a stable black hole in a particle laboratory? Must one use some kind of focuser and shielder to prevent the initial point from evaporating? In some entanglement experiements, they use laser to remove the thermal agitations in the particles. Can we do the same...
  32. Simfish

    H2 Gas: Stability and Reactivity on Earth's Surface

    If it didn't escape to space so easily, then would it easily react with other things on Earth's surface?
  33. R

    Is it possible to create a stable material denser than Osmium?

    I was thinking that since the density of something is as much dependent on the molecular structure as the atomic, that there should be some leeway here.
  34. T

    How long will a star remain stable by burning Silicon

    Given the semi-empirical mass formula for the binding energy of a nucleus is B(Z,A)=a1A-a2A2/3-a3Z2/A1/3-a4(Z-N)2/A+delta(Z,A) calculate the energy released in the reaction 28Si +4He --> 32S + gamma. Hence find how long silicon burning will sustain a massive star which has 1Mo of silicon in...
  35. Simfish

    How stable are caves over time?

    Especially over geologically significant intervals of time? Is cave collapse inevitable?
  36. B

    Why is a photon released when an electron moves to a more stable level

    Does anyone known this, or is this something that is not known. Where is the photon located before it is released? Is it located in the electron?
  37. U

    Make this function continuous/numerically stable.

    Hello. I have a function which doesn't work near A=0. I want to change it to something that a computer can evaluate for any value of A. y = [exp(Ax) - 1] / [exp(A)-1] As you can see below, it approaches y=x when A->0. I was wondering about multiplying the numerator and denominator by...
  38. M

    How many neutrons there should be to keep an atom stable

    (1) Is there any equation to determine how many neutrons there should be to keep an atom stable? I don't mean mass - number of protons. I mean the equation that can determine an interval of neutrons based on atomic number only and the forces. (2)Why can't there be an hydrogen atom with 6...
  39. A

    Do I follow my heart and do physics, or do I do what is reasonable and stable?

    I'm going to college next year and I am having a really hard time choosing what to do. I really love physics. It is my passion and I am really good at it. I want to major in physics, but I know getting a lucrative job in that area is not going to be easy. I have been poor my whole life and I...
  40. C

    Numerical Analysis: Evaluating in a numerically stable fashion

    Hi, I need help with the following numerical analysis questions. The textbook I'm using (Intro to Numerical Analysis by Stoer) doesn't have many examples so I'm having a lot of trouble figuring out what exactly I should be doing. "Evaluating the summation as i goes from 1 to n of a sub i in...
  41. Femme_physics

    Are Ions Stable? Understanding Their Power

    Whenever I think of an ion I think of an atom that can generate electricity. Something powerful. I wonder, if an ionic state is a pretty rare state to be in that only happens under special, and mostly temporary conditions? Or, is my view of ions wrong?
  42. A

    Ranking the following from most stable to least stable

    I need help ranking the following from most stable to least stable: -(CH3)2C=CHCH2 with dot over the CH2 -(CH3)2CHCHCH3 with dot over the 2nd CH -(CH3)2CCH2CH3 with dot over the C -(CH3)2CHCH2CH2 with dot over the CH2 the dots represent the primary, secondary, and tertiary radicals...
  43. E

    Zero State, Stable Equilibrium, Dynamic System

    Could someone please help? The question reads: For which real numbers "k" is the zero state a stable equilibrium of the dynamic system (vector(x))(t+1)=A(vector(x))(t)? A= [0.1 k ## 0.3 0.3] --> a 2 x 2 matrix with ## separating the two rows. So, my thought is I need to find the...
  44. A

    Signals & Systems - Stable or Not?

    Homework Statement The system with impulse response h(t) = a_{1}\delta(t-t_{1}) + a_{2}\delta(t-t_{2}). Is this system stable or not?Homework Equations The Attempt at a Solution I drew the h(t) response and I got something like that: but I don't really know how to prove it. There is no input...
  45. J

    Why Do No Stable Mesons Exist?

    So mesons consist of two quark. I am wondering why no stable mesons exist?
  46. K

    Atom Stability: Mass Number, Radioactive Decay & More

    What's makes an atom stable or unstable? From what I know, if an atom has a mass number Z that is more than 83, it is unstable and would undergo radioactive decay to make itself stable. So, is there any criteria that classify an atom unstable?
  47. D

    Is this Solar System Stable for Long-Term Evolution of Intelligent Life?

    Aspiring hard-scifi writer here. I try to make sure details in my fiction are consistent with known science or reasonable extrapolations thereof, unless absolutely demanded by the plot (and even then I try to offer some justification). I'm wondering if the solar system I'm setting a short story...
  48. MysticDude

    More Stable Electron Configuration For Copper

    Homework Statement This isn't really a homework question, but it is part of a lecture powerpoint that the teacher will go through with on Monday and I was just getting ahead so I can understand better. [PLAIN]http://img59.imageshack.us/img59/3088/cuelectronconfig.png Homework Equations...
  49. I

    Is a Marginally Stable Airplane Safe?

    What is marginal stable airplane?
  50. E

    Is the Standard Model of Cosmology built on a house of cards?

    I enjoy Physics like many and always keep an eye out for new discoveries, but is our understanding of the universe becoming too complicated and involved. We are constantly finding new information that does not fit the current model, but by adding a new constant or variable into the equations it...
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