Make+frequent
131Tap dance — was developed in the United States during the nineteenth century, and is popular nowadays in many parts of the world. The name comes from the tapping sound made when the small metal plates on the dancer s shoes touch a hard surface. This lively,… …
132Quantum state — In quantum physics, a quantum state is a mathematical object that fully describes a quantum system. One typically imagines some experimental apparatus and procedure which prepares this quantum state; the mathematical object then reflects the… …
