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Speed of wave

Question

A metal rod of 1 m length, is dropped exact vertically  on to a hard metal floor. With an oscilloscope, it is  determined that the impact produces a longitudinal wave of 1.2 kHz frequency. The speed of sound in  the metal rod is : 

Moderate
Solution

V=fλ               λ2  =1mV=1.2  ×   103  ×   2   =   2400   m/s



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