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Byju's Answer
Standard IX
Physics
Speed of Sound
A ticking clo...
Question
A ticking clock sounds less when heard through a metal.
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Solution
The speed of sound (longitudinal wave) in a medium is given by Sir Newton as ,
v
=
√
K
/
ρ
,
where
K
=
elasticity of the medium ,
ρ
=
density of the medium ,
since solids have maximum elasticity and gases have minimum i.e.
E
s
>
E
l
>
E
g
,
therefore by above relation , we get speed of sound in solids is maximum and in gases is minimum i.e.
v
s
>
v
l
>
v
g
,
as metal is generally a solid , so speed of sound in metal will be faster than in air being a gaseous mixture i.e. given statement is false .
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