6 Open Lab W Waves on a String103A file in Physics 103A Lab Experiments folder

6 open lab w waves on a string103a file in physics

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6) Open “Lab W Waves on a String_103A” file in “Physics 103A Lab Experiments” folder on Desktop. 7) Plug the force sensor to “PASPort 1” input and press “Zero” button on the sensor with no force applied to the force sensor. 8) Start system vibrating and adjust tension carefully by pulling the force sensor away from the string vibrator so that the string vibrates in a fixed number of segments. 9) Obtain various standing waves by adjusting tension. Measure the tension to produce each standing wave case by clicking “Monitor” on the bottom of screen. Make sure that the string has very defined standing waves by pulling the force sensor to create the tension. 10) Calculate the wavelength for each case of standing wave by using the number of the segments and the length of the string. It might be easier to measure L and divide by n/2 to get wavelength. 11) From the data taken, plot a graph showing the relationship between tension F and the square of the wavelength. Fit data with regression line and calculate frequency of the vibrator f from slope of the regression line.
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Results/Data Sheet Number of loops, n Mass (g) Weight (tension) (N) Distance between nodes (cm) String length (cm) Wavelength, λ n (cm) 3 140 1.372 33 100 66 4 70 0.686 25 100 50 5 40 0.392 20 100 40 6 30 0.294 16.7 100 33.4 7 18 0.176 14.3 100 28.6 8 14 0.137 12.5 100 25 Figure A – Recorded data per # of loops Figure B – Graphic interpretation of Tension vs Wavelength Squared 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.37 0.69 0.39 0.29 0.18 0.14 f(x) = 0x - 0.1 Fitted Tension vs Wavelength Squared Wavelength Squared Tension Frequency calculation: λ = ( F )^ 0.5 x (1/ f ) , where m is the slope f = ( ( F )^ 0.5 ) / λ Wavelength(cm) Frequency 66 3.03 x 10^-4
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50 4 x 10^-4 40 5 x 10^-4 33.4 5.988 x 10^-4 28.6
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  • Spring '16
  • Frequency, Wavelength, Standing wave

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