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प्रश्न
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?
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उत्तर
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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