Question

In the following statements write 'True' against those which are true and 'False' those which are false.
(a) Sound cannot travel in vacuum.
(b) The number of oscillations per second of a vibrating object is called its time period.
(c) If the amplitude of vibrations is large, sound is feeble.
(d) For human ears, the audible range is 20 Hz to 20,000 Hz.​

Answer 1

Answer:

a) False

b) true

c)false

d)true

Answer 2

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