Longitudinal Waves. In a longitudinal wave, the motion of the medium is parallel to the direction of the wave. This means that the particles move left and right which in turn makes the other particles start to oscillate. Sound waves are longitudinal waves.
The name âZimbabweâ is an anglicized form of an African word meaning âstone housesâ, for the ruins of the Great Zimbabwe are comprised of several stone walls, monuments, and buildings built mainly of granite. The structures were created using a method called dry stonewalling, which requires a high level of masonry expertise.
In ancient Egyptian language the Nile was called 'iteru' meaning great river. It is a major river in Africa, generally regarded as the longest river in the world. Its major two tributaries are the White Nile originating as far south as Rwanda and the Blue Nile emanating from the Lake Tana is Ethiopia.t was the Greek historian Herodotus who wrote that âEgypt was the gift of the Nileâ. It is correct in a sense that without the waters of the Nile River for irrigation, Egyptian civilization would probably have been short-lived.