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19-12-2022
Physics

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Four waves are described by the following expressions, where distances are measured in meters and times in seconds.
a. y = 0.12 cos ( 3x - 21t )
b. y = 0.15 sin (6x + 42t )
c. y = 0.13 cos (6x + 21t )
d. y = - 0.23 sin (3x - 42t )

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