Question

why do we use tuning fork to produce a note of standard frequency?

Answer 1

because it is a metal u shaped fork if struck gently we can see the vibration and the speed of sound is greater than air in metal.

Answer 2

hollaaa dude

The pitch that a particular tuning fork generates depends on the length of its prongs. Each fork is stamped with the note it produces (e.g. A) and its frequency in Hertz (e.g. 440 Hz). ... Hitting the fork harder will produce a louder sound because the initial vibration was larger.

hope my ans helps