course Phy 202 I was not able to view my data from the Error Analysis I assignment on my access site.I am not sure if it takes a while for this information to show up or if i submitted it incorrectly. Because this information was not listed on my access site and because I failed to keep a written copy of my 30 data points, i was not able to complete the Error Analysis II assignment. I would be more than happy to go back and do this assignment if you could give me instructions on how I can go back and access my results and answers to Error Analysis I. ƹCxդUassignment #000 000. Physics II 06-08-2008 `ƫyͦ assignment #000 000. Physics II 06-08-2008
......!!!!!!!!...................................
21:53:17 Most queries in this course will ask you questions about class notes, readings, text problems and experiments. Since the first two assignments have been experiments, the first two queries are related to the experiments. While the remaining queries in this course are in question-answer format, the first two will be in the form of open-ended questions. Interpret these questions and answer them as best you can.
......!!!!!!!!...................................
RESPONSE --> I understand
.................................................
......!!!!!!!!...................................
21:54:37 Different first-semester courses addressed the issues of experimental precision, experimental error, reporting of results and analysis in different ways and at different levels. One purpose of these initial lab exercises is to familiarize your instuctor with your work and you withthe instructor 's expectations. {}{}Comment on your experience with the three lab exercises you encountered in this assignment.
......!!!!!!!!...................................
RESPONSE --> I have encountered mean, average, standard deviation, and the bell curve before so these exercises were familiar to me. I enjoy this type of work a lot, and enjoyed these assignments.
.................................................
......!!!!!!!!...................................
21:56:51 This question, related to the use of the TIMER program in an experimental situation, is posed in terms of a familiar first-semester system. Suppose you use a computer timer to time asteel ball 1 inch in diameter rolling down a straight wooden incline about 50 cm long. If the computer timer indicates that on five trials the times of an object down an incline are 2.42sec, 2.56 sec, 2.38 sec, 2.47 sec and 2.31 sec, then to what extent do you think the discrepancies could be explained by each of the following: {}{}a. The lack of precision of the TIMER program{}{}b. The uncertain precision of human triggering (uncertainty associated with an actual human finger on a computer mouse){}{}c. Actual differences in the time required for the object to travel the same distance.{}{}d. Differences in positioning the object prior to release.{}{}e. Human uncertainty in observing exactly when the object reached the end of the incline.
......!!!!!!!!...................................
RESPONSE --> I would think that human error (b., d., and e.) would account for most of the discrepancy. I would contibute the rest to the other options (a., and c.) confidence assessment: 2
.................................................
......!!!!!!!!...................................
21:58:40 How much uncertainty do you think each of the following would actually contribute to the uncertainty in timing a number of trials for the ball-down-an-incline lab? {}{}a. The lack ofprecision of the TIMER program{}{}b. The uncertain precision of human triggering (uncertainty associated with an actual human finger on a computer mouse){}{}c. Actual differencesin the time required for the object to travel the same distance.{}{}d. Differences in positioning the object prior to release.{}{}e. Human uncertainty in observing exactly when the object reached the end of the incline.
......!!!!!!!!...................................
RESPONSE --> I would contribute most of the uncertainty to human error (b., d., and e.). Only a small percent of the uncertainty would be contributed to lack of precision of the timer, and actual differences in the time required for the object to travel the same distance. confidence assessment: 2
.................................................
......!!!!!!!!...................................
22:00:51 What, if anything, could you do about the uncertainty due to each of the following? Address each specifically. {}{}a. The lack of precision of the TIMER program{}{}b. The uncertainprecision of human triggering (uncertainty associated with an actual human finger on a computer mouse){}{}c. Actual differences in the time required for the object to travel the same distance.{}{}d. Differences in positioning the object prior to release.{}{}e. Humanuncertainty in observing exactly when the object reached the end of the incline.
......!!!!!!!!...................................
RESPONSE --> From research and statistics classes that I have taken before, i contribute most of the discrepency and uncertainty to human error. The timer program may not work perfectly but a human is probably more apt to mess up that a computer program. Also, more than likely, it will take about the same amount of time each time for the object to travel the same distance, if it under the same circumstances and conditions each and every time. confidence assessment: 2
.................................................