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:
9,10.3,10.9
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 38 deg
2.2 46 deg
2.1 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 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 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 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
Joules per centimeter, Joules
They cluster good, they seem to indicate a straight-line relationship.
**While you're copying and revising, just go ahead and include a revision on this one. The revised energies will give you different answers for this question.**
Lengths of first and second rubber band for (first-band) tensions supporting 2, 4, 6, 8 and 10 dominoes:
2.1, 27.9
Joules per centimeter, Joules
The question was 'Report in comma-delimited format the length of the first rubber band when supporting the specified number of dominoes, and the length you measured in this experiment for second band. You will have a pair of lengths corresponding to two dominoes, four dominoes, ..., ten dominoes. '.
Your answer would indicate that the first rubber band is 2.1 cm long, and the second is 27.9 cm long. I know that's not what you intended; from your note I suspect you are reporting the stretch and the energy, but it's not clear for what.
It clusters good and it indicates straight line-relationship
Mean sliding distance and std dev for each set of 5 trials, using 2 rubber bands in series:
8.4, 21.1
8.6, 21.3
9, 22
9.8, 23.3
The way the question was asked, you have reported in the first line a mean sliding distance of 8.4 cm with standard deviation 21.1 cm. Did you mean the reverse?
I suspect that this is a report of the length and the energy.
It could be that the questions got out of sequence; however they seem to again be in sequence a couple of questions later. Don't worry about this unless it makes a difference later.
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, 1.1
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 per centimeter, Joules
Clusters good indicate a straight line relationship
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.
yes it is because the more the rubber band is stretched the more it will travel
How long did it take you to complete this experiment?
1 hour and 15 minutes
Optional additional comments and/or questions:
Please send me 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.