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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
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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