Question

a sound wave has a frequency 2 Hz of wave length 40 cm how long will it take to travel 1.6 km

Answer 1

GIVEN:
frequency( n) =2kHz= 2 x 1000 Hz= 200Hz
[ 1kHz = 1000 Hz]
Wavelength(λ) = 40cm=40/100=0.4m
[ 1cm = 1/100 m]
Distance= 1.6km= 1.6x1000m = 1600 m
[1km = 1000 m]
Speed of sound(V)= frequency× wavelength
V =2000×0.4
V=800m/s
Speed=Distance/ time
Time= distance/ speed
Time = 1600/ 800
Time =2sec.
Hence, the time required to travel 1.6km is 2sec.
HOPE THIS WILL HELP YOU...

Answer 2

Answer:

THE SOUND WILL TAKE 2 SEC TO COVER A DISTANCE OF 1.6 KM

Explanation:

Frequency =2kHz =>2×1000=>2000Hz

Wavelength =40cm=> 40/100 =>4/10 m

Speed of sound=> Frequency × Wavelength

=>2000×4/10 =>800m/s

Distance=1.6km =>1.6 ×1000 =>1600 m

Time taken=Distance /Speed

=1600/800 =>2sec

$it will take 2second tocover1.6km$

HOPE IT WILL HELP YOU