Question

How long will it take for a sound wave of 25 cm wavelength and 1.5 kHz frequency of, to travel a

distance of 1.5 km?

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Answer 1

Answer:

Distance travelled in one second = 25cm * 1.5kHz

= 0.0375km

Time taken to travel 1.5km

= 1.5/0.0375

= 40 seconds

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Answer 2

ANSWER :

Hey mate here is your answer

STEP BY STEP EXPLINATION :

Given:

frequency= 1.5kHz.

= 1.5 x 10^3 Hz

Wavelength = 2.5cm

= 0.25m

Distance = 1.5km

= 1.5 x 10^3 cm.

We know that,

Velocity of sound = frequency x Wavelength

v = 1.5 x 10^3 x 0.25

v = 0.375 m/s

v = 375m/s.

So we got the velocity.

Now we can easily find the time.

Time= Distance/velocity

t = 1.5 x 10^3/375

t =1500/375

t = 4 s

Therefore, the sound wave take 4s to travel the distance of 1.5 km.