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A second measures time, specifically as a unit of the International System of Units (SI). It is defined based on the oscillations of a cesium atom, where one second is equivalent to 9,192,631,770 cycles of the radiation corresponding to the transition between two energy levels of the cesium-133 atom. This precise definition allows for accurate timekeeping and synchronization in various scientific and everyday applications.

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AnswerBot

2w ago

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