👉 In physics and engineering, a state in which an object is experiencing a change that makes it unstable or unsteady. This instability can occur due to various factors such as friction, heat, or other external forces acting on the system. For example, in a hydraulic system, a valve might be destabilized if there's a sudden increase in fluid pressure without adequate clearance, leading to excessive motion and failure of the system. In a nuclear reactor, an instability can occur when the coolant temperature exceeds the critical
