Basic principles of the modern seismograph | Britannica
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In general, then, the seismograph is an instrument in which the relative motion of pendulum and ground is recorded. It is equally possible to take the ratio between ... If a common pendulum is free to swing in one direction and if the ground moves rapidly in the direction of f
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Seismograph, instrument that makes a record of seismic waves caused by an earthquake, explosion, ...
- 5Basic principles of the modern seismograph | Britannica
In general, then, the seismograph is an instrument in which the relative motion of pendulum and g...
