A rope is attached to a doorknob on one end. If a girl holding the other end raises and lowers her hand with a frequency of 2 Hz creating a wave with a wavelength of 0.25 m, how fast does the wave travel

asked Jan 5, 2019 80.1k views

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5 votes

speed = frequency x wavelenght
speed = 2 x 0.25
speed = 0.5ms⁻¹

Szymon Toda answered Jan 9, 2019

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