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Question

# What are the possible frequencies of the second string if one guitar string is tuned to a frequency of $352 \mathrm{~Hz}$ and another string on another guitar produces 7 beats per second when played together with the first string?

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Frequency of oscillation of some guitar string is $f_{1}=352 \mathrm{~Hz}$. When another guitar string is played with this string, wave with $7$ beats per second is produced. This means that beat frequency of resulting wave is $f_b=7 \mathrm{~Hz}$. We need to determine possible frequencies of oscillation of other string in order to obtain resulting wave with mentioned beat frequency.

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