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A Certain Sound Has a Frequency of 256 Hertz and a Wavelength of 1.3 M. Calculate the Speed with Which this Sound Travels and What Difference Would Be Felt by a Listener Between the Above Sound and Another Sound Traveling at the Same Speed - ICSE Class 10 - Physics

ConceptSound Reflection of Sound Waves

Question

A certain sound has a frequency of 256 hertz and a wavelength of 1.3 m.

1) Calculate the speed with which this sound travels

2) What difference would be felt by a listener between the above sound and another sound traveling at the same speed, but of wavelength 2.6 m?

Solution

1) For first sound, f = 256 Hz and λ = 1.3 m
We know that
Speed v = f x λ = 256 x 1.3

→ v = 332.8 m  s-1

Thus, the sound travels with a speed of 332.8 m s-1

2) For the second case, λ = 2.6 m and v = 332.8 m s-1

Frequency, f = v/lambda = 332.8/2.6

→ f = 128 Hz

The frequency of the first sound is more that of the second sound.

∴ The first sound will be shriller than the second sound

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Solution A Certain Sound Has a Frequency of 256 Hertz and a Wavelength of 1.3 M. Calculate the Speed with Which this Sound Travels and What Difference Would Be Felt by a Listener Between the Above Sound and Another Sound Traveling at the Same Speed Concept: Sound - Reflection of Sound Waves.
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