Question 13 (4 points)
use the diagram to answer the questions.
which part of the seismometer does not shake during an earthquake?
the frame
the spring
the rotating drum
the mass and pen

The mass and pen

Explanation:

Seismograph is the device used for measuring the movement of earth such as earthquake, volcanic eruptions or other movements. A seismograph can record the motion as small a 1/10,000,000 cm. Seismograph consist a recording device. Now we have electronic seismograph but earlier we had pen and drum seismograph in which pen and mass remains stable and does not shake during movement.

f is prop to m1xm2 double m1 double force

im guessing the west of station b