Your 'energy conversion 1' 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 optional message or comment: **
** 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? **
0,0
The first number represents the distance in which the dominos moved, and the second number represents the amount of degrees in which this group of dominos rotated before coming to a complete stop.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of two dominoes: **
0,0 degrees
.2, 5 degrees
.1, 5 degrees
0, 0 degrees
.2, 0 degrees
The first number in each group represents the distance in which the group of dominoes moved, and teh second number of each set represents the amount of degrees in which the group of dominos rotated before coming to a complete stop.
** Rubber band lengths resulting in 5 cm, 10 cm and 15 cm slides: **
3, 7, 10
-- able to complete all three slides
-- these numbers represent the distance in which the dominos slid after being pulled back 5 cm, 10 cm, and 15 cm.
I believe the rubber bands are over 7 cm long even when supporting minimal weight. So the 3 cm length is not possible, and the 7 cm length is unlikely.
Can you explain how the lengths were determined
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of four dominoes: **
11cm, 20 degrees
14cm, 30 degrees
13cm, 25 degrees
11cm, 23 degrees
10cm, 18 degrees
The first number represents the distance the dominoes traveled after being released, and the second number represents the amount the dominoes rotated during each trial.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of six dominoes: **
12cm, 20 degrees
10cm, 17 degrees
11cm, 20 degrees
12cm, 22 degrees
13cm, 25 degrees
The first number represents the disnce the group of 6 dominos traveled after being released, and the second number represents the amount of the dominoes rotated during each trial
These results do not differ significantly from those obtained using the tension corresponding to 4 dominoes. It is very nearly certain that there should be a difference.
Can you explain in detail how you obtained these results? Be sure to explain how you set the system up so that the rubber band had the tension corresponding to 6 dominoes.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of eight dominoes: **
14cm, 25 degrees
14cm, 24 degrees
16cm, 20 degrees
13cm, 20 degrees
15cm, 23 degrees
The first number represents the distance the group of 8 dominos traveled after being released, and the second number represents the amount of rotation the group of dominoes traveled after being released.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of ten dominoes: **
15cm, 24 degrees
13cm, 21 degrees
14cm, 26 degrees
16cm, 28 degrees
15cm, 22 degrees
the first number represents the distance the group of 10 dominos traveled once released, and the second number represents the amount in which the group of dominos rotated.
Your results for tension corresponding to 8 and 10 dominoes differed little from your results for the 4-domino tension. No need to explain these two results at this time; your explanation for the 6 dominoes might show where the discrepancy comes from.
** 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: **
10, 3, 7, 1.140
10, 4, 11.8, 1.643
10, 6, 11.6, 1.140
10, 8, 14.4, 1.140
10, 10, 14.6, 1.140
THe first number indicates the length of the rubberband, in cm. The second number represents the number of dominoes in each group. The third number indicates the mean of the distances traveled during each pull, and the forth number indicates the standard deviation of each group of trials. I was unable to figure out an equation to use in order to find the energy, but if i were able to, i would record it in Newtons*cm.
As is supports more and more dominoes the rubber band gets longer and longer. Your rubber band calibration results verify this.
Your reported lengths not consistent with your rubber band calibration results.
** 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: **
** Lengths of first and second rubber band for (first-band) tensions supporting 2, 4, 6, 8 and 10 dominoes: **
** Mean sliding distance and std dev for each set of 5 trials, using 2 rubber bands in series: **
** 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-band sliding distance and 2-band sliding distance for each tension: **
** 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: **
** 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. **
** How long did it take you to complete this experiment? **
45 min
** Optional additional comments and/or questions: **
i was unable to finish this lab due to lack of knowledge of equations to use to find some variables, as well as a lack of resources given to me in my lab kit.
Some of the information you report seems to be inconsistent with what is expected, and also with information you reported in other labs. See my notes and please answer the questions posed their.
You are welcome to ask specific questions. However you do need to complete your analysis of this experiment. Let me know specifically what you did and did not understand about the questions you didn't answer.
I'm not clear what resources were missing from your lab kits. The Initial Kit and the Standard Kit together contain all the required to do this experiment. What did you need that you don't have?
Please respond with a copy of this document, and indicate your questions, answer to my questions, and/or revisions by $#$#.