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प्रश्न
State three characteristics of the medium required for propagation of sound?
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उत्तर
Requisites of the medium for propagation of sound:
(i) The medium must be elastic.
(ii) The medium must have inertia.
(iii) The medium should be frictionless.
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संबंधित प्रश्न
Out of solids, liquids and gases :
(a) in which medium sound travels slowest?
(b) in which medium sound travels fastest?
State one observation from everyday life which shows that sound travels much more slow than light.
When we open a gas tap of a few seconds, the sound of escaping gas is heard first but the smell of gas comes later. Why?
Explain why, a ringing bell suspended in a vacuum chamber cannot be heard outside.
Sound travels in air :
Explain the experiment, with a neat diagram, to prove the following:
'Sound needs material medium for propagation.'
A boy fires a gun and another boy at a distance hears the sound of fire 2.5s after seeing the flash. If the speed of sound in air 340 m/s, find distance between the boys.
What is the audible range of frequency?
How are bats able to avoid obstacles in their way?
Do all animals have same ranges of audible frequencies?
