PHYSICS HELP
posted by Melissa .
A traverse periodic wave described by the expression y=5sin (pi x/3  30pi t) (where y and x are in meters and t is in seconds) is established on a string.
By reflecting this wave from a rigid support, standing transverse waves are set up on a stretched string. It is observed that the string is vibrating in its THIRD HARMONIC. What is the length in meters of the string?
Question 5 options:
A)
3
B)
6
C)
9
D)
12
E)
15
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