what is confusion????
explain me please.
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A seismograph, or seismometer, is an instrument used to detect and record earthquakes. Generally, it consists of a mass attached to a fixed base. During an earthquake, the base moves and the mass does not. ... Seismograph generally refers to the seismometer and its recording device as a single unit
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Unfo.llow kyo ki aap
koi galti hui h kya
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