The equation of wave is Y=Asin(wt-kx), if A=2mm, w=6.6x10³/s, k=20/cm. Calculate the phase difference between two particles 6cm apart in the wave train.
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phase difference = 2π* particle distance difference/ (wavelength)
wavelength = 2π /k
wavelength = 2π/20 = 0.314 cm
phase difference = 2π *6/ 0.314
phase difference = 120
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