drinking
glasses,
then charged up to many thousand volts. This demonstration is best done
with caution. We've been told that metal in shoes and under the
floor, can cause discharge and an alarming, though not dangerous,
shock.
Make sure the person is not using a pacemaker. This demostration works
best with long, straight, fine hair. Their hair will stand on end if
clean
and dry. This again shows that like charges repel, but it also shows
that
voltage and energy are not the same, and that a complete circuit is
needed
for a sustained current.
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