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From the given condition, f' = v / (v - 30) × f and f'' = v / (v - 30) × f'. Calculate f'' when v = 360 m/s, f = 600 Hz.

1. 103 Hz
2. 1412 Hz
3. 5000 Hz
4. 720 Hz

Correct answer: 1412 Hz

Solution

First, calculate f' using the formula f' = v / (v - 30) × f. Substituting v = 360 m/s and f = 600 Hz, f' = 360 / (360 - 30) × 600 = 360 / 330 × 600 = 654.55 Hz. Next, calculate f'' using f'' = v / (v - 30) × f'. Substituting f' = 654.55 Hz, f'' = 360 / (360 - 30) × 654.55 = 360 / 330 × 654.55 = 1412 Hz. Thus, the correct answer is B.

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