Answer:
= 391.67 Hz
Step-by-step explanation:
The sound of lowest frequency which is produced by a vibrating sting is called its fundamental frequency (
).
The For a vibrating string, the fundamental frequency (
) can be determined by:
=

Where v is the speed of waves of the string, and L is the length of the string.
L = 42.0 cm = 0.42 m
v = 329 m/s
=

=

= 391.6667 Hz
The fundamental frequency of the string is 391.67 Hz.