3 ms·

http://en.wikipedia.org/wiki/Oxford_Electric_Bell http://en.wikipedia.org/wiki/Oxford_Electric_Bell

• Someone 13y ago
  2Hz for 140 years? At PI seconds in a nanocentury, that's over 8 billion hits of those bells (http://www.physics.ox.ac.uk/history.asp?page=exhibit1 http://www.physics.ox.ac.uk/history.asp?page=exhibit1 claims ten billion) Given that each hit produces a sound, it should be possible to estimate a lower bound for the energy loss at each ring of a bell, and from that, a lower bound on the amount of energy output by each battery so far. Anyone dare make a guess what amount of power each hit of a bell takes? Also, this thing seems to operate in air. Air resistance will make some contribution, but movement of the sphere seems to be minimal.