In the following statements, tick 'T' against those which are true, and 'F' against those which are false.

(a) Sound cannot travel in vacuum. (T / F)


(b) The number of oscillations per second of a vibrating object is called its time period. (T / F)


(c) If the amplitude of vibration is large, sound is feeble. (T / F)


(d) For human ears, the audible range is 20 Hz to 20,000 Hz. (T / F)


(e) The lower the frequency of vibration, the higher is the pitch. (T / F)


(f) Unwanted or unpleasant sound is termed as music. (T / F)


(g) Noise pollution may cause partial hearing impairment. (T/F)

(a) True

(b) False


(c) False


(d) True


(e) False


(f) False


(g) True


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