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A sound wave has a frequency of 1 kHz and wavelength 50 cm . How long will it take to travel 1 km ?

Options

  1. A5 s
  2. B4 s
  3. C3 s
  4. D2 s

Correct answer

D. 2 s

Step-by-step solution

Vsound = f=0.5 1000=500 ~m / s Required time = 1 ~km 500 ~m / s = 1000 ~m 500 ~m / s =2 sec

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