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A wave produced by the superposition of two harmonic waves is described by the equation
y(x,t) = 5 cos(2 x - 2 t) sin(3 x - 8 t)
where all quantities are in SI units.
a) What is the phase velocity of the wave
Number
b) What is the group velocity of the wave
Number
c) Does the wave display normal or anomalous dispersion?
O normal
O anomalous

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