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The G string on a violin has a fundamental frequency of 196 Hz. It is 30.0...

The G string on a violin has a fundamental frequency of 196 Hz. It is 30.0 cm long. While this string is sounding, a nearby violinist effectively shortens (by sliding her finger down the string) the G string on her violin until a beat frequency of 4.7 Hz is heard between the strings on the two violins. When this occurs, how far (cm) down the string did she slide her finger? Assume that the velocity of waves on the violin string does not change when you press on the string with your finger. Give the answer to two significant figures.

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