Two tuning forks sounding together result in a beat frequency of 4.00 Hz.If the frequency of one of the forks is 258 Hz,what is the frequency of the other?
A)266 Hz or 250 Hz
B)129 Hz
C)254 Hz or 262 Hz
D)64.5 Hz
E)131 Hz

Question

Quizplus · Accepted Answer

The beat frequency is the difference between the frequencies of the two tuning forks. 
Let's call the frequency of the other tuning fork "f". 
So, we have: 
258 Hz - f = 4.00 Hz 
f = 254 Hz 
or 
f = 262 Hz 
Therefore, the frequency of the other tuning fork could be either 254 Hz or 262 Hz.

Two Tuning Forks Sounding Together Result in a Beat Frequency