While attempting to tune the note C at 131 Hz, a piano
tuner hears 5.00 beats/s between a reference oscillator
and the string.
(a) What are the possible frequencies of the string? (Give the
frequencies to the nearest integer.)
lower
possible frequency
Hz
higher
possible frequency
Hz
(b) When she tightens the string slightly, she
hears 6.00 beats/s. What is the frequency of the string
now? (Give the frequency to the nearest integer.)
Hz
(c) By what percentage should the piano tuner now change the
tension in the string to bring it into tune? (Give a positive
answer for an increase in the tension, or a negative answer for a
decrease in the tension.)
%