Question

A sound ware has a frequency of 20 KHz and
wavelength 70 cm How much time will it take to
travel a distance of 2 km​

Answer 1

here is ur ans ❤

The answer is simple first I will make data of your question

DATA:

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

hope it helps u❤

Answer 2

Answer:

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Explanation: