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.
The ruins at Great Zimbabwe are some of the oldest and largest structures located in Southern Africa, and are the second oldest after nearby Mapungubwe in South Africa. Its most formidable edifice, commonly referred to as the Great Enclosure, has walls as high as 11 m (36 ft) extending approximately 250 m (820 ft), making it the largest ancient structure south of the Sahara Desert.