A tuning fork of unknown frequency makes 4.00 beats per second with a standard fork of frequency 384 Hz. The beat frequency decreases when a small piece of wax is put on a prong of the first fork. What is the frequency of this fork?

Explanation

To find the frequency of the tuning fork, we can follow these steps:

### Step 1: Understand the Beat Frequency
The beat frequency is the absolute difference between the frequencies of two tuning forks. In this case, we have:
- Frequency of the standard fork (f2) = 384 Hz
- Beat frequency = 4 beats per second

### Step 2: Set Up the Equation
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