a group of persons, as employees, charged with carrying out the work of an establishment or executing some undertaking. a group of assistants to a manager, superintendent, or executive. a member of a staff.
Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth or an explosion. They are the energy that travels through the earth and is recorded on seismographs. Types of Seismic Waves. There are several different kinds of seismic waves, and they all move in different ways.
Seismic waves carry the energy. released by the rocks. There are three kinds of seismic. waves: P waves, S waves, and surface waves. â¢ P waves move rocks back and forth, like a wave. passing through a spring toy when you push in the coils. P waves are the fastest seismic waves.