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A sound wave has frequency 2khz …

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A sound wave has frequency 2khz and wave length 50cm calculate time its takes to travelled 2 km

Posted by Farhana Khan 3 years, 10 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 3 years, 10 months ago

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

0Thank You

ANSWER

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