Stretch out tubing with one end
fixed
to the wall. Pluck or chop the tubing to generate a
pulse that
travels
along the tubing and reflects at the wall.
NOTES
Hook
one end of the tubing to an eyebolt and channel nut in the
unistrut in the south wall.
Make sure ends of tubing are
clamped
securely
so lead shot doesn't end up on the floor.
The linear density of the lead-shot-filled tubing is 0.2 kg/m.
