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The speed of transverse waves in a 1.5-m-long stretched string is 90 m/s. A standing wave...

The speed of transverse waves in a 1.5-m-long stretched string is 90 m/s. A standing wave having five nodes (including the two at the ends) is created in the string. What is the wave’s frequency?

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Answer #1

f = nv / 2L

Notice here, nodes are 5 but we count nodes at both end as 1, therefore harmonic is 4.

therefore,

f = 4*90 / 2*1.5

f = 120 Hz

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