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California Southern University Physics Standing Waves Questions


An electric oscillator of adjustable frequency drives the string as shown in Fig. 3

mass of string (kg)

oscillation length (m)

total length (m)

Weight creates tension (kg)





(a) Find frequency of the oscillator when there are four “loops” of standing waves along L and the traveling wave equations (amplitude A=2.00 cm).

(b) If density of the string doubled but frequency remains the same, find the positions of the nodes along L.

(c) When frequency and density remain as (1), find the new weight that would induce ten “loops” of standing waves.


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