# A tuning fork is vibratin with constant frequency and amplitude. If the air is heated without changing pressure the following quantities will increase

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A tuning fork is vibratin with constant frequency and amplitude. If the air is heated without changing pressure the following quantities will increase.
A. Wavelength
B. Frequency
C. Velocity
D. Time period

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V prop sqrt(T) , V increase , lambda increase
(because frequency is constant)