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I used to have students determine the frequency of vibration by_______________________________________________
whatever
method the wanted to use than have then determine the speed of the
wave. A
quick look in the CRC Handbook and they could determine the type of
wave and
their accuracy. The CRC lists three wave speeds for Al but they
are widely
separated so it is easy to choose. Just for fun note that were you
strike
the side of the rod you generate a wave which degenerates quickly,
relatively speaking, into the wave that is generated by striking
the end of
the rod.