Definition: A nonvacuum is a state of matter that has no net electric charge. This condition can only be achieved in certain types of materials, such as semiconductors and superconductors. Nonvacuum states are often used in quantum mechanics to describe states where the total number of particles (masses) within an ensemble is zero. In physics, a vacuum is a state of absence of matter or energy. It can be defined as a state where the only forces acting on an object are
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