2. What does P in a P wave stand for? A. Parallel B. Partial C. Perpendicular D. Primary​

Sagot :

Answer:

Primary

Explanation:

Compressional waves are also called P-Waves, (P stands for "primary") because they are always the first to arrive. ... The difference in arrival time between these two types of seismic waves can be used as a rough estimate of the distance to the earthquake focus.

Answer:

D. Primary

Explanation:

Compressional waves are also called P-Waves, (P stands for "primary") because they are always the first to arrive. They gave us the first jolt last Friday. Shear waves propagate more slowly through the Earth than compressional waves and arrive second, hence their name S- or secondary waves.