Answers

The Brainliest Answer!
2016-03-02T13:26:59+05:30
We know that  20 compressions and 20 rarefactions make   20 oscillation
of the wave so the time period is 0.2/20=0.01 s
so  frequency is  f=1/T
1/0.01=100 Hz 
distance between rarefaction and compression is 50 cm so  distance between two rarefactions and two compressions is 2*50=100 cm=1 m
2 3 2
u ask this question on main page so that can ans
pls answer the above ques
i have already asked the ques in the main page
kk i will see it
kk