If the fundamental frequency of a certain string is 84 hz, what is the frequency of the second harmonic? 42 hz 84 hz 126 hz 168 hz

The frequency of the second harmonics is 168 Hz.

Explanation:

Fundamental frequency is the frequency associated with the ground state energy level. It is denoted by

Second harmonic frequency is the frequency associated with the second energy level where n = 2. It is denoted by

The relationship between fundamental and second harmonic frequency is:

We are given:

Putting value in above relationship, we get:

Hence, the frequency of the second harmonics is 168 Hz.