👉 Non-adjustability, also known as invariance, is a concept in physics and engineering that refers to an object or system being able to maintain its original state or behavior under repeated changes in conditions. In other words, a system remains unchanged by any external forces or changes in the environment it operates in. In non-adjustability, the fundamental properties of the system (such as mass distribution, temperature, chemical composition) are not altered by changes in external conditions. This is often expressed mathematically
