Question

Two sinusoidal waves travel along the same string. They have the same wavelength and frequency. Their amplitudes are ym1= 2.5 mm and ym2= 4.5 mm, and their phases are /4 rad and /2 rad, respectively. What are the amplitude and phase of the resultant wave?
A) cannot solve without knowing the wavelength
B) 5.1 mm, 0.51 rad
C) 5.1 mm, 0.79 rad
D) 6.5 mm, 1.3 rad
E) 7.0 mm, 1.3 rad

Answer

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