First slide

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

$\begin{array}{l} V = f λ \frac{λ}{2} = 1 m \\ V = 1 .2 \times 10^{3} \times 2 = 2400 m / s \end{array}$

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