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A copper rod of length l=50 cm is clampe...

A copper rod of length `l=50 cm` is clamped at its midpoint. Find the number of natural longitudinal oscillations of the rod in the frequency range from 20 to `50 k Hz`. What are those frequencies equal to ?

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The correct Answer is:
26.6 kHz , 34.2 kHz , 41.8 kHz , 49.4 kHz
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