S.
(a)
In the following statements, tick T against those which are true, and F
against those which are false.
Sound cannot travel in vacuum. (f/F)
(b) The number of oscillations per second of a vibrating object is called
Its time period. (X/F)
If the amplitude of vibration is large, sound is feeble. (T/TY
(d) For human ears, the audible range is 20 Hz to 20.000 Hz. (/F)
The lower the frequency of vibration, the higher is the pitch. (P/F
Unwanted or unpleasant sound is termed as music. [T/FI
le)
Nese pollution may cause partial hearing impairment. [/F)
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Answer:
a. True
b. True
c.False
d.True
e False
f True
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