Question

a sound wave causes the density of air at a place to oscillate 1200 times in 2 minutes.Find the timeperid and frequency of the wave.

Answer 1

Time period (T) = Time taken for one oscillation

T = (2 min × 60 s/min) / 1200 = 0.1 seconds

_______________

Frequency (f) = Total number of oscillations in 1 second

f = 1/T = 1/(0.1 s) = 10 Hz

Answer 2

Number of oscillations = 1200

Time taken = 2 min = 120 sec

Time period = 120/1200 = 0.1 sec

Frequency = 1/T = 1/0.1 = 10 Hz

Hope it helps