[BC] Aluminum and magnetic/electric currents

[Gary Peterson]

" With the aluminum plate at normal room temperature, the pendulum
oscillated
back and forth rather freely between the magnets, coming to rest under the
effect of normal friction and gravity.
Sherrod Munday "

I remember working with chemical, analytical balances that featured magnetic
damping.  There was an aluminum paddle that passed between two magnets as
the balance teetered back and forth.  It was very effective in settling the
thing down for a reading.  The amount of aluminum that passed between the
magnets was adjustable.  I presume that the magnets induce eddy currents in
the moving paddle and I squared R losses convert the motion to heat.  Also,
isn't the rotating disk in a watt-hour meter made of aluminum?

Gary, K?CX