Question

A source of wave produces 20 compression and 20 rarefraction in 0.4 sec. Calculate its frequency .

Answer 1

Answer:

50 Hz

Explanation:

frequency : number of waves per second

20 compressions & 20 rarefactions make 20 waves....hence

0.4 sec --------20 waves

1 sec ------------? waves

x = 1 × 20 / 0.4

x = 50 Hz