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The intensity of an earthquake is measured with a

Q. The intensity of an earthquake is measured with a
 A   Barometer
 B   Hydrometer
 C   Polygraph
 D   Seismograph
Answer:-Seismograph
Explanation:  

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.

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