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Question
A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change?
Options
Displacement amplitude
Frequency
Wavelength
Wavelength
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Solution
Wavelength
The velocity of a sound wave varies with temperature as follows:
\[v \propto \sqrt{T}\]
As the temperature increases, the speed also increases. However, since the frequency remains the same, its wavelength changes.
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