On february 15, 2013, a superbolid meteor (brighter than the sun) entered the earths atmosphere over Chelybinsk, Russia, and exploded at an altitude of 23.5km. Eyewithnesses could feel the intense heat from the fireball, and the blast wave from the explosion blew out windows in buildings. The blast wave took approximately 2 minutes 30 seconds to reach ground level.
a. What was the average velocity of the blast wave?
b. Compare this with the speed of sound, which is 343 m/s at sea level.
