Question
Question: There is a set of four tuning forks, one with the lowest frequency vibrating at 550 Hz. By using any...
There is a set of four tuning forks, one with the lowest frequency vibrating at 550 Hz. By using any two tuning forks at a time, the following beat frequencies are heard: 1,2,3, 5, 7, 8. The possible frequencies of the other three forks are:
A
552,553,560
B
557,558,560
C
552,553,558
D
551,553, 558
Answer
551,553, 558
Explanation
Solution
551 Hz fork can produce beats of frequencies 1, 2, 7 with 550 Hz, 553 Hz and 558 Hz forks respectively. 553 Hz fork can produce beat frequencies 3 and 5 with 550 Hz and 558 Hz forks respectively. 558 Hz can produces 8 Hz beat with 550 Hz fork.