A student strikes a tuning fork and notices that it produces a shrill sound. If they want to increase the 'pitch' of this sound, which property of the vibration must they increase?

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A Amplitude
B Speed of sound
C Frequency
D Time Period

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Answer: C. Frequency

Explanation: The pitch of a sound is directly determined by its frequency (the number of oscillations per second). A higher frequency results in a shriller, higher-pitched sound.

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A student strikes a tuning fork and notices that it produces a shrill sound. If they want to increase the 'pitch' of this sound, which property of the vibration must they increase?

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