A seismic wave is simply a means of transferring energy from one spot to another within the earth. Although seismologists recognize different types of waves, we are interested in only two types: P (primary) waves, which are similar to sound waves, and S (secondary) waves, which are a kind of shear wave.
Several committees divide their work into sub units called subcommittees. The Senate currently has 16 standing committees, and 4 permanent select or special committees. The House has 19 standing committees and 3 permanent select committees. Committee sizes range from 6 to 50 members per committee. In the House, one person may not serve on more than two standing committees and four subcommittees at one time, though waivers can be granted to serve on additional committees.
The Senate Committee on Budget (ca. 1997-2001). This is a complete list of U.S. congressional committees (standing committees and select or special committees) that are currently operating in the United States Senate. Senators can be a member of more than one committee.