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?A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency?

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