Question

sound wave has a frequency 2 kHz and wave length 40cm.How long will it take to travel 1.6km?

Answer 1

Answer:

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Explanation:

Time =2sec. Hence, the time required to travel 1.6km is 2sec

Answer 2

Explanation:

Frequecy=f=2hz

Wavelength=λ=40cm=0.4m

Distance=S=1.6km=1600m

Time taken by the wave to reach the distance 1600m = t = ??

Solution:

Since we know that :-

V=fλ

By using the above formula we will find velocity (v):-

V=2×0.4

V=0.8m/s

So as we know that:-

V=S/t

Therefore:-

T=S/V

By subsituting the values in above equation:

T=1600/0.8

T=2000seconds

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