Marbles passing from tower to tower

This session introduced the notion of harmonics, frequency, oscillation, triangulation and, of course, solving problems. We talked about the Tacoma Narrows bridge failure , particular thanks to Mr. Hamshaw and we looked at a glass being broken with sound.
Homework - go home and try singing to a wine glass ... loudly and highly pitched... or simply run your finger lightly around a slightly dampened rim of a wine glass.. you s
hould hear the harmonic evidence of ocillating frequency. See video here, http://www.youtube.com/watch?v=ECNDpCYvaOc

Next meeting not until 5th May - happy Easter form Mr. Geekie and the team.

see video here
http://www.physics.ucla.edu/demoweb/demomanual/acoustics/effects_of_sound/breaking_glass_with_sound.html