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I would like to try the wall-moving demo described below.next
1. Is the aluminum rod held in a horizontal or a vertical position
to the wall?
....or does the free end of the rod extend into the room?
It is horizontal perpendicular to the wall.
2. is the flat piece of metal (or cube) attached to the wall or tothe
top of a horizontal table?
On top of a level table (preferably massive)
3. Will it make any difference if the aluminum rod is much longeror much
shorter than 30 cm??
I use a meter long lab table aluminum demo rod. Any could be used.
Gene Gordon