course Phy 122 ssignment #001001.
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14:43:43 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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14:45:24 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 --> I feel by running the first 3 labs it has gotten me to think about how a small amt of error increases with continuing use of derivitives, and if your arent very precise, then your answers will vary greatly from the actual as calculations go on.
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14:49:35 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 --> I think the program would be pretty accurate and that discrepancies would be more from human error. The discrepancies could be the person who is clicking the button to start and stop the experiment, also it could be the inital force which is exerted on the ball when released. I dont feel there would be difference that great of the object traveling the same distance. I do think a large amount of discrepancy could be from the positioning of the object prior to release. And I do feel a large amount could be from the uncertainty in observing when teh object reaches the ground. confidence assessment: 3
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14:52:29 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 dont feel that the timer program is unaccurate. I do feel a great amount of uncertainty is from the percision of human triggering, when they are actually clicking the button to start and stop the program. I dont feel a large degree would be from the actual difference in time for the object to travel down the incline. I do feel a large degree would be from the differences in positionin the object prior to release. And I do feel a lot of uncertainity would be from the human uncertainty in knowing exactly when the object reaches the end of the incline. confidence assessment: 2
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14:54:33 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 --> Nothing, it is how the program runs and works. Set something up so when the ball runs over a cord it automatically starts a timer, taking out human error. Nothing Set up something to place the ball in, and let that thing release the ball, thus taking out different positioning. Do the same thing as you did for starting, set it up so the computer automatically starts and stops confidence assessment: 3
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course Phy 122 ssignment #001001.
......!!!!!!!!...................................
14:43:43 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 -->
.................................................
......!!!!!!!!...................................
14:45:24 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 feel by running the first 3 labs it has gotten me to think about how a small amt of error increases with continuing use of derivitives, and if your arent very precise, then your answers will vary greatly from the actual as calculations go on.
.................................................
......!!!!!!!!...................................
14:49:35 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 --> I think the program would be pretty accurate and that discrepancies would be more from human error. The discrepancies could be the person who is clicking the button to start and stop the experiment, also it could be the inital force which is exerted on the ball when released. I dont feel there would be difference that great of the object traveling the same distance. I do think a large amount of discrepancy could be from the positioning of the object prior to release. And I do feel a large amount could be from the uncertainty in observing when teh object reaches the ground. confidence assessment: 3
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14:52:29 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 dont feel that the timer program is unaccurate. I do feel a great amount of uncertainty is from the percision of human triggering, when they are actually clicking the button to start and stop the program. I dont feel a large degree would be from the actual difference in time for the object to travel down the incline. I do feel a large degree would be from the differences in positionin the object prior to release. And I do feel a lot of uncertainity would be from the human uncertainty in knowing exactly when the object reaches the end of the incline. confidence assessment: 2
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14:54:33 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 --> Nothing, it is how the program runs and works. Set something up so when the ball runs over a cord it automatically starts a timer, taking out human error. Nothing Set up something to place the ball in, and let that thing release the ball, thus taking out different positioning. Do the same thing as you did for starting, set it up so the computer automatically starts and stops confidence assessment: 3
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