Rourke Publishing 2004
The key difference between different forms of transportation is speed. The slowest form of transportation is walking. When driving, we use our speedometer and measure our miles per hour. Trains typically travel a faster average speed than a car. Plane travel is much faster than driving or trains. Sound travels faster than a plane. Speed of light travels faster than sound.
Your Reaction: Boring. This lays things out simply to understand the speed, but it isn’t very exciting.
Potential Problems: None.
Recommendations: If you really just want some facts about speed of travel this book is helpful.