Apiano tuner strikes her tuning fork and plays a note on the piano at the same time. she hears 8 beats in 4 seconds. how much should the pitch of the string be changed?

a. 8 hz

b. 4 hz

c. 2 hz

d. 0.5 hz

C

Explanation:

The number of beats per second produced when two sounds are played together is equal to the difference in frequencies between the two sounds. Since 8 beats are produced in 4 seconds, 2 beats will be produced in one second, and the frequency difference is 2 Hz.