Speed of sound vs. Speed of force.
Many times over the past 30 or 40 years, a video clip has been shown on TV documentaries. It shows an atomic explosion and the effect of this explosion on a wooden building and a number of tall evergreen trees.
If I recall it correctly, there is a sequence of events coming from the explosion. First, there is the visual effect of light (and probably radiation). Then a shock wave could actually be seen as it past by the building and the trees. Final, there was a force of air that blew the building and the trees over.
Can anyone recall this film clip and what, if any, time delay there was between the shock wave and the force of the explosion?
Dave J