course Phy 202 Are the grades for these posted on Blackboard maybe? I'd like to see my grades as I complete my work if possible. Thanks. z付]NJռ}Dassignment #000
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14:04:29 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
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14:04:37 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.
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RESPONSE --> I found the work to be okay although it seems unnecessarily tedious at times and redundant. I liked the labs but every time I had to answer something that I felt was redundant or sort of pointless to ask, I became a little frustrated. The labs take so long and with the excess factor it adds to it..I find myself having to stop and go a lot because it's a lot to do. I think the labs are fun and the do teach me. I'm just not to keen on having to constructively repeat myself or explain things that seem evident and self explanatory.
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14:23:34 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 a steel 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 --> The lack of precision of the TIMER program could be very well be a factor. We were told that the timer is only accurate to about .01sec, so that could be a factor. Human error may play a huge part in it whether it be with lack of precision in clicking or placement of the object. I do not think the actual differences in the time required for the object to travel the same distance is an issue...If all were the same as far as placement and the materials were constant I don't see how, if everything was constant, the time required would change. But with that said, the time would vary if placement and precision were off. confidence assessment: 2
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14:28:22 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 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 lack of precision of the TIMER program would contribute the least because the other factors have much more room for error. The uncertain precision of human triggering ties into uncertainty in observation and the actual time required for the object to travel the distance will vary if the point of release varies. So, I think that point of release would affect uncertainty the most. confidence assessment: 2
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14:32:54 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 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 --> The lack of precision of the TIMER program--You could either use a more precise timer or a stopwatch. Other than that you cannot change how accurate the program can read. The uncertain precision of human triggering---You could just make sure you are on your toes and paying attention to be as efficient and quick as possible. Actual differences in the time required for the object to travel the same distance--Since the time required won't change if the other factors don't change, try your hardest to have the exact same release point for each trial and time as accurately as possible each time. be consistent. Differences in positioning the object prior to release--Mark a line or space from which you will release the ball every trial to eliminate the guess-work. Human uncertainty in observing exactly when the object reached the end of the incline--Simply pay attention and make sure you don;t time to soon or too late..Be consistent. confidence assessment: 2
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