question_answer 4)

Fill in the blanks with suitable words. (a) Time taken by an object to complete one oscillation is called ______. (b) Loudness is determined by the ______ of vibration. (c) The unit of frequency is ______. (d) Unwanted sound is called ______. (e) Shrillness of a sound is determined by the ______ of vibration.  

Answer:

(a) time period                  (b) amplitude (c) hertz                           (d) noise (e) frequency