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10 August, 13:51

Sally enjoyed the opportunity to collect data from standing waves in a spring. She and her partner held the ends of the spring 4.0 meters apart. There were 5 nodes in the standing wave produced. Sally moved her hand fromt he rest position back and forth along the floor 20 times in 4 seconds. What is the frequency of the wave Sally made? a. 10/secondb. 5 hzc. 10 hzd. 1 hz

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  1. 10 August, 17:25
    0
    5 Hz

    Explanation:

    In this case it is not necessary to take into account the frequency of the string for 5 nodes. Because of the superposition principle for waves, the new wave produced by Sally is only the frequency generated by her hand:

    f = (20 times) / (4 s) = 5 Hz

    I hope this is useful for you

    Regards
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