A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string? A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string? a. 1059 hertz b. 1053 hertz c. 1056 hertz d. 3168 hertz e. need more information

E

Explanation:

There is not enough information in the question. A beat is the observed differences between two frequencies.

Hence, 3 beat represents a difference of 3-hertz between the two frequencies. So the frequency of the piano string could be 1056+3 = 1059-hertz or 1056-3 = 1053-hertz.

In order to ascertain the actual value i. e if it is an increase or a decrease in frequency observed, we need more information.