Answers

2015-03-31T21:23:52+05:30
Shrillness of a sound is determined by the frequency of vibration
0
Plz mark it as the best ..... plz
2015-03-31T21:25:13+05:30
Shrillness of a sound is determined by the frequency  of vibration.
0
Hmm..ok
:)
::))
Now no more comments on did ques..
ok