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Two friends are doing a sound experiment: Harry drops a ringing tuning fork off the edge
of a cliff. Ron stands at the base and records the frequency of the sound. Ron makes a graph
of the frequency he observes as a function of time. Which of the following graphs best
represents the frequency which Ron measures? Explain why.
Graph 1
Graph 2
Time
Time
Graph 3
Graph 4
Time
Time
Frequency
Frequency
Frequency
Frequency

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