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`        A copper rod of length 1.0 m is clamped at its middle point. Find the frequencies between 20 Hz and 20,000 Hz at which standing longitudinal waves can be set up in the rod. The speed of sound in copper is 3.8 km s-1.`
3 years ago

Kevin Nash
332 Points
```										Sol. a) Here given l = 5 cm = 5 × 10^–2 m, v = 340 m/s
⇒ n = V/2l = 340/2 * 5 * 10^-2 = 3.4 KHz
⇒then the highest harmonic in the audible range (20 Hz – 20 KHz)
= 20000/3400 = 5.8 = 5 (integral multiple of 3.4 KHz).

```
3 years ago
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