What metal can absorb vibrations?
A2 Lead is about the least sonorous metal. At earthquake
frequencies, it is used to absorb huge quantities of energy. The
lead-rubber bearing, consisting of alternate plates of rubber and
steel, and with a core of lead, is nowadays used commonly to
isolate buildings and bridges from earthquake effects.
Less known are lead extrusion dampers - like giant bicycle
pumps, which pump lead from one end to the other. These rely on the
fact that lead re-forms almost instantaneously to its crystal form.
Both were invented by a New Zealander, W H Robinson.
A1 Captain America's shield!