Question

a sound wave has a frequency of 3khz and wavelength 17.5cm. How long will it take to travel 1.5km​

Answer 1

Answer:

The time taken by the wave to travel a distance of 1.5 km is 2.86 s.

Explanation:

The frequency of the sound wave, f = 3 Khz = 3000 Hz

The wavelength of the sound wave, λ = 17.5 cm = 0.175 m

We have the equation:

Speed = frequency × wavelength

        v = fλ

∴ Speed , v = 3000 × 0.175

                   = 525 m/s

The equation of speed is given as;

Speed = distance / time

⇒ Time = distance / speed

So the time taken by the wave to travel a distance of 1.5 Km will be:

Time = 1500 / 525            [∵ 1.5 Km = 1500 m]

         = 2.86 s