Question
The wavelength of a sound wave is 40 cm and the time period is 0.0005 s. How many seconds will it take to travel a distance of 4 km?
Answer: Option A
:
A
Given:
Wavelength of sound wave, λ=40cm=0.4m
Time period, T=0.0005s
Distance travelled, s=4km=4000m
Let speed of sound wave be v.
Speed of a wave is the product will be:
v=λT
v=0.4m0.0005s
v=800ms−1
Let the time taken for the wave to travel distance s be t.
From definition of speed,
v=st
t=sv
t=4000800=5s
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:
A
Given:
Wavelength of sound wave, λ=40cm=0.4m
Time period, T=0.0005s
Distance travelled, s=4km=4000m
Let speed of sound wave be v.
Speed of a wave is the product will be:
v=λT
v=0.4m0.0005s
v=800ms−1
Let the time taken for the wave to travel distance s be t.
From definition of speed,
v=st
t=sv
t=4000800=5s
Was this answer helpful ?
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