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Physics
Physics
Problem
A sound wave in air is represented by
y
(
x
,
t
)
=
0.003
cos
(
6
x
−
900
t
+
π
6
)
y(x,t)=0.003\cos\bigl(6x-900t+\tfrac{\pi}{6}\bigr)
y
(
x
,
t
)
=
0.003
cos
(
6
x
−
900
t
+
6
π
)
, where
x
x
x
and
y
y
y
are in metres and
t
t
t
in seconds. a. (a) Calculate the speed of the wave. b. (b) Determine its time period.
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