The tension in each of two strings is adjusted so that both vibrate at exactly 666 Hz.The tension in one of the strings is then increased slightly.As a result,six beats per second are heard when both strings vibrate.What is the new frequency of the string that was tightened?
A) 672 Hz
B) 660 Hz
C) 669 Hz
D) 663 Hz

Question

Quizplus · Accepted Answer

When the tension in a string is increased, the frequency increases. The beat frequency is the difference between the two frequencies, which is 6 Hz. Therefore, the new frequency is 666 Hz + 6 Hz = 672 Hz.

The Tension in Each of Two Strings Is Adjusted So