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You generate a wave in a spring, stretched out on the floor, by oscillating your hand back and forth at a frequency of 1.6 Hz. The wave has a 1.5-m wavelength. If the wave takes 2.9 s to travel to the other end of the spring and back to your hand, what is the length of the stretched spring?

  • physics -

    f=1.6 Hz
    λ=1.5 m
    v= λf=1.5•1.6=2.4 m/s
    L=vt/2=2.4•2.9/2=3.48 m.

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