Definition of sound, what sound waves are, how they are generated and what media they can travel through.
The difference between mechanical and electromagnetic waves is demonstrated using a vacuum, a bell jar, and cell phones.
Reviews the definition of sound, the nature of sound waves, how sound waves are generated, and the media through which they can travel.
Discover how electromagnets in telephones turn electrical signals to sound waves that you can hear.
Discover how advanced 3-D sonar was used to explore a ship in the Gulf of Mexico that was sunk in a battle during the U.S. Civil War.