Your work on energy conversion 1 has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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How far and through what angle did the block displace on a single trial, with rubber band tension equal to the weight of two dominoes?
1 cm, 10 deg
5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of two dominoes:
1.1 cm, 11 deg
.9 cm, 10 deg
1 cm, 10 deg
1.2 cm, 12 deg
1.1 cm, 9 deg
Rubber band lengths resulting in 5 cm, 10 cm and 15 cm slides:
9 cm, 10. 3 cm ,10.9 cm
5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of four dominoes:
2 cm, 45 deg
2 cm, 40 deg
1.9 cm, 28 deg
2.2 cm, 46 deg
2.1 cm, 40 deg
5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of six dominoes:
4 cm, 45 deg
4.5 cm, 50 deg
4.3 cm, 48 deg
4 cm, 49 deg
4.2 cm, 39 deg
5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of eight dominoes:
8 cm, 60 deg
8.2 cm, 57 deg
8.3 cm, 55 deg
8 cm, 60 deg
8.1 cm, 61 deg
5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of ten dominoes:
11.5 cm, 75 deg
11.2 cm, 70 deg
11.6 cm, 73 deg
11.5 cm, 75 deg
11.3 cm, 76 deg
Rubber band length, the number of dominoes supported at this length, the mean and the standard deviation of the sliding distance in cm, and the energy associated with the stretch, for each set of 5 trials:
8.4 cm, 4, 2.04, .1140, 26.231 Joules
8.6 cm, 6, 4.2, .2121, 29.471 Joules
9 cm, 8, 8.12, .1304, 31.786 Joules
9.8 cm, 10, 11.42, .1643, 35.632 Joules
** The energies you report are not correct, as noted in my response to the preceding lab.
After correcting your energy calculation as instructed on the preceduing lab, you need to resubmit this question and change your energies. Just copy the question, your corrected response and this note, along with your revision to the specified questions below.**
Slope and vertical intercept of straight-line approximation to sliding distance vs. energy, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature:
1.5, 25.8
** When you correct your energies, it will change your graph, so your response on this question will change also. Please also include this question and your revised answers.
Joules/cm, Joules
They cluster very closely, and seem to indicate a straight line relationship.
Lengths of first and second rubber band for (first-band) tensions supporting 2, 4, 6, 8 and 10 dominoes:
2.1, 27.9
Joules/cm, Joules
They cluster close the line, and have a straight-line relationship.
Mean sliding distance and std dev for each set of 5 trials, using 2 rubber bands in series:
8.4 cm, 21.1 cm
8.6 cm, 21.3 cm
9 cm, 22cm
9.8 cm, 23.3 cm
There might be some confusion between what I thought was asked here and your response. In any case the main thing is to correct your energy calculations above.
Slope and vertical intercept of straight-line approximation to sliding distance vs. energy, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature:
1.42, .08367
2.12, .1304
3.82, .8843
12.16, .1817
1-band sliding distance and 2-band sliding distance for each tension:
1.8, 2.1
2.04, 1.42
4.2, 2.12
8.12, 3.82
11.42, 12.16
Slope and vertical intercept of straight-line approximation to 2-band sliding distance vs. 1-band sliding distance, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature:
1.8, 26.3
Joules/ cm, Joules
The cluster is close to that of a straight line.
Discussion of two hypotheses: 1. The sliding distance is directly proportional to the amount of energy required to stretch the rubber band. 2. If two rubber bands are used the sliding distance is determined by the total amount of energy required to stretch them.
This experiment strongly supports the following hypothesis: The sliding distance is directly proportional to the amount of energy required to stretch the rubber band. If two rubber bands are used the sliding distance is determined by the total amount of energy required to stretch them.
How long did it take you to complete this experiment?
1 hour and 15 minutes
Optional additional comments and/or questions:
Please let me know if you have any questions related to this orientation assignment.
Your work has not been reviewed.
Please notify your instructor of the error, using the Submit Work form, and be sure to include the date 03-10-2006.
Please send revisions on the questions on which I included notes preceded by **. Don't worry about the others, except to understand that your energy calculations were in error throughout. If you correct them for the first part, that will be sufficient for the purposes of this lab.