In November, 1940, the newly completed Tacoma Narrows Bridge, opened barely four months before, swayed and collapsed in a 42 mile-per-hour wind. There were no casualties except a dog trapped in a car stranded on the bridge. A rescue was attempted (by the man with the pipe), but the frightened animal would not leave the car.
The site was declared a National Historic Landmark to discourage relic seekers and salvage operations.
Produced by Stillman Fires Collection; Tacoma Fire Department (Video) - Castle Films (Sound)
Shared by Lyn Lall.
This video is used as an introduction to the concept of mechanical resonance. This is then extended to resonance in a wine glass, using a practical demonstration and supported with another You tube video. One Mechanical resonance is understood, this leads into MRI and how hydrogen nuclei in the water in the body can be used to image the body using MRI.
License: Public Domain (see: http://www.archive.org/details/SF121)