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The mechanical energy of a pendulum is constant and is the sum of the [[kinetic energy]] a [[Category:Hardware (mechanical)]] ...

...antum mechanics. When they are later separated, they keep the same quantum mechanical description or "state." In the diagram, one characteristic (e.g., "up" spin ...mputers are electronic machines. But the designers of the early [[computer hardware]] of around 1950 or 1960 did not need to think about quantum mechanics. The ...