I was recently pointed to yet another excellent coffee cup resonance video, this time from Quanta Magazine, featuring Stanford mathematician Tadashi Tokieda. The sound reproduction is particularly good on this video (and the online magazine site is also good). Also, the more traditional “hot chocolate effect” from Jearl Walker’s Flying Circus of Physics site, which now hosts two dozen videos. His video about entrained air is replicated by others this can be done reliably with simple stirring. Dan Russell’s hot chocolate effect video is also good (with a thorough explanation), and his short wineglass flexure strobe video closes the loop to see what Professor Tokieda was describing in the first video. Now that the cold weather is here, it’s hot chocolate cup physics time. And wine of course.

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