course Phy 121 gzܞassignment #000
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09:53:20 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 --> i do understand
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09:54:38 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 want to state it in terms of distance per time. or d/t which is the velocity. i would divide the distance by the amount of time it took to get there to get the avg velocity. it would be something like 5 cm per second confidence assessment: 3
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09:55:39 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 --> 40 cm/ 5 s would = 8 cm per second. this is similar to the timing experiment where i rolled a can down a book. confidence assessment: 3
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09:57:15 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 --> it initially went 40cm in 5 sec it went 20 cm in 3 sec so the avg velocity on the first half is 6.7 cm per second it went the other 20 cm in 2 sec so the avg velocity on the second half would be 10 cm per sec confidence assessment: 3
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10:00:35 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 program seemed to be rounding off and not accurate past the hundreth place b. certainly the human part comes into play and is different for each person, and we couldn't be accurate even to the hundreth place c.different factors could play like wind resistance, and in my case condesation was increasing as i was using a cold can of dr. pepper d.we surely didn't place the can at exactly the same spot on the book to start the project each time e. our eyes are not perfect, and it stands to reason that nothing is perfect, therefore nothing can be proved completely confidence assessment: 3
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10:00:50 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 --> confidence assessment:
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10:01:04 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 --> i already answered this one confidence assessment: 3
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10:01:49 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 --> doubling the length of my pendulum resulted in more than half of the frequency of oscillations confidence assessment: 3
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10:02:50 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 --> it must be that the pendulum was so short that a push didn't even move it, almost as it the pendulum were one object instead of two confidence assessment: 2
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10:04:21 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 --> maybe the length was so long that it took more than 60 seconds for the pendulum to oscillate, therefore the vertical point would remain on zero confidence assessment: 2
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10:04:59 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 --> it would mean that this pedulum had no length, maybe it was just dangling there..... confidence assessment: 1
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10:05:38 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 2 points must be 30 cm apart. 5 sec x 6 cm per second confidence assessment: 3
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10:08:00 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 honestly think i understand the problems you asked us to do in ch. 1. the only confusing thing in the text there was problem #12 part b. i didn't know what that little ""u"" looking symbol was confidence assessment: 3
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10:08:14 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 --> i already answered this confidence assessment: 3
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