Not → stable, as in → unstable atom, → unstable equilibrium.
atom-e nâpâydâr (#)
Fr.: atome instable
An atom whose nuclei → decay by → radioactivity.
Fr.: équilibre instable
An equilibrium state of a system in which if a small perturbation away from equilibrium is applied, the system will move farther away from equilibrium state. For example, mechanical equilibrium in which the potential energy is a maximum, as a sphere placed on top of a hill. Mathematically, if the second derivative of the energy with respect to the coordinate of interest is negative, the system is in an unstable equilibrium. → stable equilibrium.
→ unstable; → equilibrium.