heat conductors, liquid nitrogen, heat source, work gloves
Description:
Shows
thermal
expansion
and
contraction.
Metal
ball
and
loop:
ball
won't
fit
through
loop
when
at
room
temperature,
but
will
after
it
has
been
cooled
in
liquid
nitrogen.
Bimetallic
strip:
heat
this
strip,
and
it
will
bend.
PIRA 4A30.10, 4A30.20