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.
Dry, Subtropical Climate. High-pressure cells at the Tropic of Cancer keep conditions dry and subtropical in the northern Sahara Desert. The hottest temperature on record for this region is 136.4 degrees, but winter evenings can get surprisingly cool, falling to around 55 degrees.