Your 'rubber band calibration' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Your initial comment (if any): **
** first line ruler markings, distance in actual cm between ends, how obtained: **
1,6.95cm
5.95cm
i measured the length of the rubber band under the load of one domino. this rubber band is marked with a number 1 +or- point 0.02
** The basis for your uncertainty estimate: **
due to the human factor of supporting the rubber band the shaking may have played a factor
** Positions of the ends of each rubber band, actual lengths of each when the chain supports 1 domino: **
1,9.67
1,4.82
1,8.49
1,8.51
1,9.37
end
8.67,3.82,7.49,7.51,8.37
i numbered the bands 1,2,3,4,5,6
due to the human factor of supporting the rubber band the shaking may have played a factor
** Distances between ends when supporting 2 dominoes **
6.93,9.01,3.89,7.52,7.89,8.35
the results were from the weight of 2 dominoes
** Lengths when supporting 4, 6, ... dominoes: **
1,7.93;1,10.01;1,4.89;1,8.52;1,8.89;1,9.35;
4
1,7.20;1,10.12;1,5.16;1,8.72;1,8.71;1,9.40;
6
1,7.50;1,10.45;1,5.32;1,8.89;1,9.19;1,9.45;
8
1,7.65;1,10.45;1,5.38;1,9.02;1,9.23;1,9.46;
10
End
the lab kit that i bought at the VHCC did not include dominoes or rubber bands so i substituted to labyrinth tokens and used my own rubber bands
The initial lab materials package contains rubber bands and other items used in early experiments, as well as the CD/DVDs for the course. It doesn't cost much and you should pick up that package.
** Your table of force in Newtons vs. length in cm for all rubber bands **
5.95cm,1.1305n;8.67cm,1.6473n;3.82cm,0.7258n;7.49cm,1.4231n
6.93cm,5.2668n;9.01cm,6.8476n;3.89cm,2.9564n;7.52cm,5.7152n;
7.2cm,8.208n;9.12cm,10.3968n;4.16cm,4.7424n;7.72cm,8.8008n;
6.5cm,9.88n;9.45cm,14.364n;4.32cm,6.5664n;7.98cm,12.1296n;
6.65cm,12.635n;9.45cm,17.955n;4.38cm,8.322n;8.02cm,15.238n;
** Describe the graph of your first rubber band **
the shape of curve the first rubber band was steeply inclined that is increasing at an increasing rate.
band #1 is thin
band #2 thick
band #3 thin
band #4 thin
band #5 thin
band #6 thick
end
the thickness of the band is represented in the shape of the curve
** The tension force in your first rubber band at length 9.8 cm: **
6.1n
** The length of your first rubber band when tension is 1.4 N: **
7cm
** The forces at your observed lengths the 1st rubber band, as given by the curve, and the deviations of those curve-predicted lengths from the observed lengths: **
4.4n,4.8n,5.31n,5.7n,6.3n
3.3n,.4n,2.89n,4.18n,6.3n
** The lengths predicted for forces .19 N, .38 N, .76 N, 1.14 N, etc. by the curve for your first rubber band; the deviations of your actual observations from these predictions: **
6.4cm,6.55cm,6.7cm,6.9cm
.45cm,.38cm,.5cm,.4cm
** The typical error you estimate when predicting force for a given length from your graphs: **
i have more faith in the values that i measured because we did a approximate curve fit.
i was within .4cm this is the difference between the measured values and the curve.
** The typical error you estimate when predicting length for a given force from your graphs: **
the uncertainty would be .3cm based on the difference in distance between the projective curve and the actual data points
** **
3 hours
** **
You appear to have good information. Be sure to see my note.