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Two waves traveling on a string in the same direction both have a frequency of 100...

Two waves traveling on a string in the same direction both have a frequency of 100 Hz, a wavelength of 2 cm, and an amplitude of 0.02 m. What is the amplitude of the resultant wave if the original waves differ in phase by each of the following values?

(a) π/6 cm

(b) π/3

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