PHY 201
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: **
20,27.2
7.2 cm
±.1 cm
** #$&* The basis for your uncertainty estimate: **
** #$&* Positions of the ends of each rubber band, actual lengths of each when the chain supports 1 domino: **
±.1 cm
** #$&* Distances between ends when supporting 2 dominoes **
20,27.2
31,38.3
42,49.1
53.9,61.0
65,72.3
76.3,83.5
end
7.2,7.3,7.1,7.1,7.3,7.2
** #$&* Lengths when supporting 4, 6, ... dominoes: **
7.7,7.7,7.6,7.6,7.8,7.8
2
** #$&* Your table of force in Newtons vs. length in cm for all rubber bands **
7.2,7.3,7.1,7.1,7.3,7.2 .19 newtons
1
7.7,7.7,7.6,7.6,7.8,7.8 .38 newtons
2
8,8,7.9,8,8.1,8.2 .76 newtons
4
8.3,8.3,8.3,8.2,8.4,8.5 1.14 newtons
6
8.5,8.6,8.6,8.5,8.7,8.8 1.52 newtons
8
8.8,8.9,9,9,9.1,9.1, 1.9 newtons
10
** #$&* Describe the graph of your first rubber band **
Increasing at a steady rate for all 6 rubber bands.
** #$&* The tension force in your first rubber band at length 9.8 cm: **
2.5 N
** #$&* The length of your first rubber band when tension is 1.4 N: **
9.0 cm
** #$&* The forces at your observed lengths the 1st rubber band, as given by the curve, and the deviations of those curve-predicted lengths from the observed lengths: **
.2,.4,.8,1.4,2.0
.01,.02,.04,.12,.10
** #$&* 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: **
7.3,7.9,8.4,8.7,8.9,9.3
.1,.1,.2,.2,.1,.2
** #$&* The typical error you estimate when predicting force for a given length from your graphs: **
The value reported.
±.1 N
** #$&* The typical error you estimate when predicting length for a given force from your graphs: **
±.1 cm That seemed to be the uncertainty in my data for each rubberband.
** **
1.75 hrs
** **
&#Your work looks very good. Let me know if you have any questions. &#