Question

a sound wave causes the density of air at a place to oscillate 1200 times in 2 minutes. find the time period and frequency of the wavw

Answer 1

frequecy =1/timeperiod
and time period =1/frequency

therefore = 10 is the frequency
and 1/10 is the time period

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