A factor used in retrospective premium calculations. It is a percentage of the standard premium and is used to provide the insurer with up-front money for administrative expenses. The Basic Premium Ratio, a percentage, is generally found in the retro manual of the plan being used. Retrospective plans, otherwise known as retros, are claim sensitive workers compensation rating programs specifically designed and used when an employer is of the size required to justify its use.
Q: In which order will seismic waves from an earthquake arrive? A. P waves, S waves, L waves B. L waves, S waves, P waves C. P waves, L waves, S waves D. S waves, P waves, L waves. A: P waves, S waves, L waves is the order of the seismic waves in which an earthquake arrives. baby_SJ01|Points 310|.
There are three basic types of seismic waves â P-waves4, S-waves5 and surface waves. P-waves and S-waves are sometimes collectively called body waves. P-waves, also known as primary waves or pressure waves, travel at the greatest velocity6 through the Earth. When they travel through air, they take the form of sound waves â they travel at the speed of sound (330 ms-1) through air but may travel at 5000 ms-1 in granite7. Because of their speed, they are the first waves to be recorded by a seismograph8 during an earthquake.