Consider a guitar string that is fixed at each end. It is gently plucked in such

Question

Consider a guitar string that is fixed at each end. It is gently plucked in such a way that only
the fundamental note can be heard. Which of these would NOT change the frequency of the note
that you hear? EXPLAIN WHY TO GET POINTS PLEASE.

A. A change in the speed of sound in air (by changing the air density, temperature, etc.)
B. A change in the length of the guitar string
C. A change in the tension in the guitar string
D. A change in the mass of the guitar string
E. (All of the above would change the frequency of the note you hear)

Explanation / Answer

A. A change in the speed of sound in air (by changing the air density, temperature, etc.)

f = sqrt (T * L/ m) / 2L ..here f don't depend on density of air

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