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JEEMAIN and NEET
>>
Physics
>>
Class11
>>
Waves
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Q)
The displacement
y
of a particle in a medium can be expressed as
y
=
10
−
6
sin
(
100
t
+
20
x
+
π
4
)
m
, where
t
is in second and
x
is in metre. The speed of the wave is
(
a
)
2000
m
/
s
(
b
)
5
m
/
s
(
c
)
20
m
/
s
(
d
)
5
π
m
/
s
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