Question

Its urgent..

(a) A sound wave has frequency of 3 kHz and a wavelength 45 cm. How long will it take to travel
1.8 km?​

Answer 1

Answer:

It is given that

Frequency =3kHz=3000Hz

Wavelength =45cm=45/100 m

we know that

Velocity =Frequency into wavelength

V=3000(45/100)

V=1350m/sec

Now time =distance /speed

Time = 1800m/1350m/sec

Time= 1.333sec

Explanation: