In the following statements, tick
against those which are true, and
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 /
(e) The lower the frequency of vibration, the higher is the
pitch. (T / F)
(f) Unwanted or unpleasant sound is termed as music. (T /
(g) Noise pollution may cause partial hearing impairment.
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