course Phy 231 I completed this assignment over the course of two separate days; therefore, I sent the information from both files. ~MŊFѐYassignment #000
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19:18:04 The Query program normally asks you questions about assigned problems and class notes, in question-answer-self-critique format. Since Assignments 0 and 1 consist mostly of lab-related activities, most of the questions on these queries will be related to your labs and will be in open-ended in form, without given solutions, and will not require self-critique. The purpose of this Query is to gauge your understanding of some basic ideas about motion and timing, and some procedures to be used throughout the course in analyzing our observations. Answer these questions to the best of your ability. If you encounter difficulties, the instructor's response to this first Query will be designed to help you clarify anything you don't understand. {}{}Respond by stating the purpose of this first Query, as you currently understand it.
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RESPONSE --> This first Query is to gauge my understanding of the underlying ideas found Assignments 0 and 1, and to help identify any difficulties I have with the material so far.
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19:20:06 If, as in the object-down-an-incline experiment, you know the distance an object rolls down an incline and the time required, explain how you will use this information to find the object 's average speed on the incline.
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RESPONSE --> I would take the distance traveled and divide that by the time necessary to travel, which will provide the average speed. confidence assessment: 3
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19:21:50 If an object travels 40 centimeters down an incline in 5 seconds then what is its average velocity on the incline? Explain how your answer is connected to your experience.
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RESPONSE --> The average velocity is 40cm/5s or 8cm/s, which is related to study material of vector analysis. confidence assessment: 3
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19:24:24 If the same object requires 3 second to reach the halfway point, what is its average velocity on the first half of the incline and what is its average velocity on the second half?
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RESPONSE --> During the first half the average velocity is 20cm/3s or approximately 6.67cm/s, and has an average velocity of 20/2s or 10cm/s during the second half. confidence assessment: 3
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19:59:13 Using the same type of setup you used for the first object-down-an-incline lab, if the computer timer indicates that on five trials the times of an object down an incline are 2.42 sec, 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 thefollowing: {}{}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 positioningthe 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 is able to measure in units of 0.01563, which means the differences are likely not caused in large part by the timer itself. b. uncertainty of human triggering is a likely cause of the differences, but not likely the sole cause for such a range of values. c. irregularities of the surfaces involved should not create a difference that would change the figures shown; therefore, the actual time would not appear to differ from the given precision. d. the slight differences possible in initial position are not enough to cause such differences of measurement e. human uncertainty in when the object reached the end of the incline is the other likely cause of difference in value. In short human caused error is greatest contributor to the differences seen here. confidence assessment: 3
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20:04:50 How much uncertainty do you think each of the following would actually contribute to the uncertainty in timing a number of trials for the object-down-an-incline lab? {}{}a. The lack of precision of the TIMER program{}{}b. The uncertain precision of human triggering (uncertainty associated bLine$(lineCount) =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. uncertainty of timer would cause discrepancies only of .01563 seconds, which is insignificant to the given data. b. this uncertainty is likely to cause a larger difference in value as great as a tenth of a second in difference. c.irregularities of surfaces involved would only contribute to uncertainty that the timer would not be able to detect. d. too small to be measured with the timer program. e. likely to cause error noticable in tenths of seconds difference in data collection confidence assessment: 3
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20:25:06 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. Actualdifferences 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 uncertainty of the timer can not be changed b. practice in timing could reduce human error, but the best solution would to use a laser triggered device connected the timer program. c. use a smoother surfaces with reduced friction involved d. use a stopper to position the ball to keep the position consitant e. using a laser triggered device would also reduce this error as well. confidence assessment: 3
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20:38:35 According to the results of your introductory pendulum experiment, do you think doubling the length of the pendulum will result in half the frequency (frequency can be thought of as the number of cycles per minute), more than half or less than half?
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RESPONSE --> more than half because when you halve the length of the pendulum you also then take the square root of the length which will give a frequency greater than half of the previous value confidence assessment: 3
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χwDݑԷ assignment #000 000. `Query 0 Physics I 11-17-2008
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18:17:02 If an object travels 40 centimeters down an incline in 5 seconds then what is its average velocity on the incline? Explain how your answer is connected to your experience.
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RESPONSE --> confidence assessment: 3
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18:17:11 If the same object requires 3 second to reach the halfway point, what is its average velocity on the first half of the incline and what is its average velocity on the second half?
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RESPONSE --> confidence assessment: 3
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18:17:42 Using the same type of setup you used for the first object-down-an-incline lab, if the computer timer indicates that on five trials the times of an object down an incline are 2.42 sec, 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 thefollowing: {}{}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 positioningthe object prior to release.{}{}e. Human uncertainty in observing exactly when the object reached the end of the incline.
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RESPONSE --> confidence assessment: 3
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18:17:51 How much uncertainty do you think each of the following would actually contribute to the uncertainty in timing a number of trials for the object-down-an-incline lab? {}{}a. The lack of precision of the TIMER program{}{}b. The uncertain precision of human triggering (uncertainty associated bLine$(lineCount) =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 --> confidence assessment: 3
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18:17:57 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. Actualdifferences 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 --> confidence assessment: 3
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18:18:02 According to the results of your introductory pendulum experiment, do you think doubling the length of the pendulum will result in half the frequency (frequency can be thought of as the number of cycles per minute), more than half or less than half?
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RESPONSE --> confidence assessment: 3
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18:20:10 Note that for a graph of y vs. x, a point on the x axis has y coordinate zero and a point on the y axis has x coordinate zero. In your own words explain why this is so.
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RESPONSE --> Because any point along the x-axis itself has the y value of 0, and any point along the y-axis itself has an x value of 0. confidence assessment: 3
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18:25:28 On a graph of frequency vs. pendulum length (where frequency is on the vertical axis and length on the horizontal), what would it mean for the graph to intersect the vertical axis (i.e., what would it mean, in terms of the pendulum and its behavior, if the line or curve representing frequency vs. length goes through the vertical axis)? What would this tell you about the length and frequency of the pendulum?
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RESPONSE --> If the graph were to intersect the vertical axis it would occur only when the pendulum has no length, and that would also mean that the pendulum has no frequency, because it would not actually exist. confidence assessment: 3
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18:27:24 On a graph of frequency vs. pendulum length, what would it mean for the graph to intersect the horizontal axis (i.e., what would it mean, in terms of the pendulum and its behavior, if the line or curve representing frequency vs. length goes through the horizontal axis)? What would this tell you about the length and frequency of the pendulum?
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RESPONSE --> If the line were to intersect the horizontal axis the pendulum at some indeterminate length have no frequency, which would only occur when the pendulum is not in motion. confidence assessment: 3
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18:28:49 If a ball rolls down between two points with an average velocity of 6 cm / sec, and if it takes 5 sec between the points, then how far apart are the points?
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RESPONSE --> The points would be at 5 sec (6 cm/sec) = 30 cm distance between the points. confidence assessment: 3
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18:41:22 On the average the ball moves 6 centimeters every second, so in 5 seconds it will move 30 cm. {}{}The formal calculation goes like this: {}{}We know that vAve = `ds / `dt, where vAve is ave velocity, `ds is displacement and `dt is the time interval. {}It follows by algebraic rearrangement that `ds = vAve * `dt.{}We are told that vAve = 6 cm / sec and `dt = 5 sec. It therefore follows that{}{}`ds = 6 cm / sec * 5 sec = 30 (cm / sec) * sec = 30 cm.{}{}The details of the algebraic rearrangement are asfollows:{}{}vAve = `ds / `dt. We multiply both sides of the equation by `dt:{}vAve * `dt = `ds / `dt * `dt. We simplify to obtain{}vAve * `dt = `ds, which we then write as{}`ds = vAve *`dt.{}{}Be sure to address anything you do not fully understand in your self-critique.
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RESPONSE --> I believe I fully understand this procedure self critique assessment: 3
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18:44:52 You were asked to read the text and some of the problems at the end of the section. Tell me about something in the text you understood up to a point but didn't understand fully. Explain what you did understand, and ask the best question you can about what you didn't understand.
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RESPONSE --> I believe I understand fully all of the material so far confidence assessment: 3
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18:57:09 Tell me about something in the problems you understand up to a point but don't fully understand. Explain what you did understand, and ask the best question you can about what you didn't understand.
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RESPONSE --> When I was trying to solve for the uncertainty aspects of the last few problems I was not certain how I should calculate the uncertainty, and the book didn't seem to discuss how to do so. confidence assessment: 1
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