P waves can travel through liquid and solids and gases, while S waves only travel through solids. Scientists use this information to help them determine the structure of Earth.
S waves have a larger amplitude than P waves and cause the ground's surface to move both vertically and horizontally, making them more dangerous. Surface waves, which move slowly, are the last to arrive. P waves leave the earthquake first and go the furthest. Rock oscillates perpendicular to the direction of wave propagation in S or shear waves. In rock, S waves typically move at a pace of roughly 60% that of P waves, and they always come after the latter. Points of solid media move back and forth perpendicular to the wave's direction of propagation due to S waves, also known as shear or transverse waves. As the wave passes, the medium is sheared first in one direction and then in the opposite direction.
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Enclaves and exclaves may be created because of ethnic or cultural differences. As political boundaries change, some groups may be separated or split into different territories. ... An enclave is a territory or country with boundaries that are completely within the boundaries of another country.
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following the end of the civil in 1949, Costa Rica abolished its army and redirected its budget to-ward healthcare and education. Ever since and up to this day, Costa Rica has achieved some of thehighest living standards and development indicators in Latin America. Furthermore, unlike mostother countries in the region, Costa Rica has not had dictatorships or armed conflicts since the abolishment of its army. In addition, soon after the abolishment of its army, the country started experiencing a notable economic growth divergence relative to the rest of the countries in the region. Thus, these institutional changes along with long-standing democratic history have been considered to be factors of paramount importance that have led to these developmental achieve-ments and democratic stability in the country up to this day.
Both Mexico and The united states are federal republics and and are divided into states also, the head of state is known as "President" and also has the same legislation.
