Question

2.
How does the mechanism of production of sounds in birds differ from that in
human beings?
3.
vacuum.
Describe a simple experiment to show that sound cannot propagate through
А- A-G
On a hot summer day, a little mosquito produces a warning sound near your
car by vibrating its wings at the rate of 3,000 wing beats per five seconds. State
the frequency, in hertz, of this sound.
Explain why we always hear the thunder a little after we see the flash of
5.
lightning
6.
(a) Define 'loudness' and 'pitch'.
(b) State the effect on the-
(1) loudness of a sound when the amplitude of the vibrating body increases.
(ii) pitch of a sound when the frequency of the vibrating body increases.
Why is noise pollution regarded as harmful for human beings?
7
Value Rased Question​

Answer 1

Answer:

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