fB = f2 - f1
f2 = f1 + fB = 132 + 6 = 138 Hz
A hammer in an out-of-tune piano hits two strings and produces beats of 6 Hz. One of the strings is tuned to 132 Hz.
fB = 6 Hz
f1 = 132 Hz
Part (a) What is the highest frequency the other string could have?
Part (b) What is the lowest frequency the other string could have?
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