A sound wave in air has a frequency of 680 Hz. If the speed of sound is 340 m/s, what is its wavelength?
Answer and explanation
Correct answer: A. 0.50 m
- Step 1: Use the wave equation: v = f * lambda.
- Step 2: Solve for wavelength: lambda = v / f.
- Step 3: Substitute values: lambda = 340 / 680 = 0.50 m.
Answer
0.50 m.
Why not the others: '2.0 m' inverts the quotient as f / v = 680 / 340; '0.25 m' divides by 2 twice; '1.0 m' doubles the calculated wavelength.
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