Missiles Speed Comparison In this video, we compare the speeds of different missiles. We will look at the Mach speed of each missile, as well as the countries that produced them. We have a 150 km distance, and we will see how many seconds does each missile need to cross that distance. Just a short definition for anyone who doesn't know what a Mach speed is. Mach speed is the speed of an object relative to the speed of sound. For example, a missile that is traveling at Mach 2 is traveling twice a