The goal of Unit 11 of The Physics Classroom Tutorial is to develop an understanding of the nature, properties, behavior, and mathematics of sound and to apply this understanding to the analysis of music and musical instruments.
It's as big as the continental United States, but covered in sand. If you like to dig your feet in the sand, then the Sahara Desert is the place for you. Watch out though - it's hot! Temperatures range from 122 F to below freezing in the winter. Sand dunes can reach over 189 meters tall or be flat for miles and miles.
The south of the Sahara Desert, along the boundary with the hot semi-arid climate (BSh) of the Sahel, receives most of his annual rainfall during the highest-sun months (summer) when the Inter-Tropical Convergence Zone moves up from the south while. Wind and sand storms occur as soon as early spring.