You and a friend each have one rope. You tie the two ropes together and stand as

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You and a friend each have one rope. You tie the two ropes together and stand as far apart as possible, each holding one end of the new longer rope and pulling to put it under tension. You then begin moving your arm in such a way as to produce a harmonic wave with a wavelength of \(1.0 \mathrm{~m}\). Your friend looks at the waves as they reach her arm. Is it possible that she measures a wavelength of

(a) \(0.8 \mathrm{~m}\),

(b) \(1.0 \mathrm{~m}\), or

(c) \(1.2 \mathrm{~m}\) ?

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