Waves Vibrations and Oscillations

What metal can absorb vibrations?

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2012-07-14 22:03:36

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!

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