One day supersonic flight may be possible. Watch a video that walks viewers through the history of air flight and the possibility of reaching supersonic speeds. Until then, travelers should get comfortable with ten-hour flights across...

Sound waves travel pretty quickly, but humans can travel faster. Follow along with this short animated video as it investigates the physics behind the breaking of the sound barrier and the sonic booms that are...

Calculating frequency is so easy it Hertz! The video begins by describing transverse and longitudinal waves, and then it explores their properties and applications. Finally, it applies this to the formulaic relationships between wave...

Holding a conversation underwater has its challenges. Sound and light waves can travel in different mediums, but it affects their waves. The video explains the process of refraction and diffraction and how it relates to energy waves. 

What lives in the ocean, has ears, walks on all fours, and can reach a top speed of 18 miles an hour? Why, the sea lion, of course! A cute, animated video introduces viewers to the majestic aquatic mammal.

One of the most flammable sports balls turns out to be ping pong balls. Watch a ping pong ball burn using Schlieren imaging. The video details how Schlieren imaging works in color, black and white, and in slow motion. 

This interactive quiz from the NOVA Web site features an array of interesting facts about the nature of sound underwater.

This article from Khan Academy provides information about sound and how it travels through different media. This information is intended for high school physics students.

How fast does sound actually travel? [3:44]

We can measure speeds relative to the speed of sound. [4:04]

Teacher created, flipped video to teach about sound. [21:57]

Explains what Mach numbers mean. [4:04]