What is the difference between stable and unstable?
An equilibrium is considered stable (for simplicity we will consider asymptotic stability only) if the system always returns to it after small disturbances. If the system moves away from the equilibrium after small disturbances, then the equilibrium is unstable.
If the difference between the solutions approaches zero as x increases, the solution is called asymptotically stable. If a solution does not have either of these properties, it is called unstable.
If the air comes back to where it started, the atmosphere is stable. If the air continues to rise the atmosphere is unstable. In the figure above the air in the parcel has ended up colder and denser than the surrounding air. In this case the parcel would sink back to the ground.
Stable air resists vertical motion and tends to bring benign (though not necessarily good) weather, while unstable air can bring turbulence and severe weather.
: firmly established : fixed, steadfast. stable opinions. : not changing or fluctuating : unvarying. in stable condition. : permanent, enduring.
Structure is in stable equilibrium when small perturbations do not cause large movements like a mechanism. Structure vibrates about it equilibrium position. Structure is in unstable equilibrium when small perturbations produce large movements – and the structure never returns to its original equilibrium position.
A system is said to be stable, if its output is under control. Otherwise, it is said to be unstable. A stable system produces a bounded output for a given bounded input.
If the process distribution remains consistent over time, i.e. the outputs fall within the range (Process Width), then the process is said to be stable or in control. If the Outputs are spread across outside the limits, then the process is Unstable or Out of Control.
A system itself is said to be unstable if at least one of its state variables is unstable. In continuous time control theory, a system is unstable if any of the roots of its characteristic equation has real part greater than zero (or if zero is a repeated root).
Stable equilibrium exists when the object is in its lowest energy condition; metastable equilibrium exists when additional energy (ΔG) must be introduced before the object can reach true stability; unstable equilibrium exists when no additional energy is needed before reaching metastability or stability.
What is stability with example?
A system is said to be in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite to the direction of the displacement. For example, a marble at the bottom of a bowl will experience a restoring force when displaced from its equilibrium position.
The truth is, there is a difference between the two. The answer is short and sweet. Balance is your ability to control your body without movement against gravity. Stability is your ability to control your body during movement.
What makes air stable or unstable? It is the vertical profile of temperature, or lapse rate of the atmosphere, which determines whether an air mass is stable or not.
Air is considered unstable, in the lowest layers of an air mass when the air is warmer and or more humid than the surrounding air. When this occurs the air will rise, as that air parcel is warmer than the air surrounding it. In an unstable environment, the weather can change suddenly and can be violent.
stable air - happens when warm air stays above cold air. The weather is likely to remain calm. unstable air - happens when there is a quick change in temperature. Can lead to sudden thunderstorms.
A house, shed, or building, for beasts to lodge and feed in; especially, a building or apartment with stalls, for horses; as, a horse stable; a cow stable.
OTHER WORDS FOR stable
1 fixed, secure, sturdy. 4 invariable, staunch, constant, reliable, steady, unswerving, unvarying. See synonyms for stable on Thesaurus.com.
- sturdy.
- strong.
- durable.
- reliable.
- dependable.
- fast.
- sound.
- solid.
A structure which will not topple over easily when acted upon by a load is said to be stable. To gain a better understanding of stability, it's necessary to understand center of gravity. The position of a structure's center of gravity has a lot to do with stability.
A structure is stable if its centre of gravity lies above its base. An object is unstable when its centre of gravity lies outside its base. In other words, an object is unstable if a line drawn between its centre of gravity and the centre of the Earth does not pass through its base.
What is an example of an unstable system?
An inverted pendulum is a classic example of an unstable system.
In everyday language, and often in materials science, a chemical substance is said to be "stable" if it is not particularly reactive in the environment or during normal use, and retains its useful properties on the timescale of its expected usefulness.
: not stable : not firm or fixed : not constant: such as. : not steady in action or movement : irregular. an unstable pulse. : wavering in purpose or intent : vacillating. : lacking steadiness : apt to move, sway, or fall.
Last Updated: June 21, 2016 February 12, 2019. Short Answer. In terms of travel insurance, medically stable means that either you haven't been diagnosed with a medical condition or that you are cleared by a doctor to travel with your current medical condition(s).
The stable isotopes have nuclei that do not decay to other isotopes on geologic time scales but may themselves be produced by the decay of radioactive isotopes. Radioactive (unstable) isotopes have nuclei that spontaneously decay over time to form other isotopes.