Question

how far does the sound travel in air when a tuning fork of 560 Hz makes 30 vibrations? (speed of the air = 336m/s)

Answer 1

Number of vibrations in 1 second = 560

Time taken for 30 vibrations = 30 / 560 = 3/56 second

Distance = Speed × Time
= 336 m/s × 3/56 s
= 18 m

∴ Sound travel 18 m when the tuning fork makes 30 vibrations.