course Phy 202 ?????€????????assignment #000000.
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15:50:19 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.
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RESPONSE --> Ok i understand
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15:51:48 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.
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RESPONSE --> My first initial lab experiments did not take long to carry out but did take a while to finish the question and answer portion. These were standard lab questions that i encountered in the first weeks of my Phy 201 class and i did not have too much trouble with them.
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15:55:25 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.
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RESPONSE --> a. The timer program was precise but my measurements may not have been b. My triggering was probably the biggest source of error in the experiment c. about .20 seconds was the range of difference in the time intervals d. Not more than 1-2 mm of distance e. That was another human error that would be another big source of error confidence assessment: 3
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15:55:45 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.
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RESPONSE --> i understand confidence assessment: 3
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15:58:12 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.
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RESPONSE --> a. Nothing i could do, the timer is setup in a program that i have no control over b. I could have done a better job of being more precise with my timing c. If my timing were better then the range of time difference would be shorter d. I did my best to get the ball in the exact same place as the time before e. That comes with the territory of the experiment, but on my part i could have done more accurate trials confidence assessment: 3
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