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INSTRUCTIONS
Set up standing-wave experiment with yellow string attached to 150 grams of mass. Assume linear mass density of the string is μ = 1.630 E-3 kg/m.
Find the frequency & amplitude of the sine-wave generator which produces a number of interior nodes in the string’s standing-wave pattern.
Measure the wavelength using the fact that the distance between any two adjacent nodes is λ/2.
Calculate measured value v1 (m/s) by multiplying freq f (Hz) times λ (m). Calculate accepted value v2 (m/s) = √ (F/μ). F is the attached weight (in N).
Calculate percent error between v1 & v2.
REPEAT the above procedure by lowering the frequency so that number of interior nodes is reduced. Is your percent error improved? Is the ratio of your two frequencies the same as the ratio of the number of interior nodes produced?
Which standing-wave harmonic did you form in this experiment (1st, 2nd, 3rd, 4th, etc.) for each of the two cases? Show photos of both experimental standing-wave patterns.
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