course Phy121 assignment #000
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13:15:27 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 query program is used to measure my understanding of the ideas of motion and timing. I will be using this type of program and knowledge in future questions and tests.
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13:18:37 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 --> The formula of average speed is distance/rate = average speed of that particular object. This formula is required for that particular experiment. confidence assessment: 3
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????????P?? assignment #000 000. `Query 0 Physics I 02-13-2007
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14:13:40 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 will be used to gauge my ideas about the subject matter of motion and timing as well as the procedures used to make observations.
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14:15:05 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 use the formula of distance traveled divided by the time from point a to point b. It will equal it's average speed. confidence assessment: 3
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14:20:59 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 --> Average velocity of the object in question would be determined depending on the number of times the object moves down the incline. confidence assessment: 2
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14:28:23 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 --> The average velocity of the first 3 second is 6.6 cm/s whereas the second half it increases to 10 cm/s. confidence assessment: 3
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14:32:59 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 precision would not be that much of a factor due the constant of the programing of the timer. b. The human element would be a huge discrepancy due to the fallibility of the reaction time of the finger on the mouse. c. If we could measure accurately each distance then this wouldn't be a huge problem. d. The positioning of the object would be a small problem unless you marked and perfectly placed the object each time. e. This goes along with the human element of fallability of the human element. confidence assessment: 3
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14:35:40 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. Not too much. It cna be accuate if used correctly. b. human triggering of the mouse would contribute considerably. c. This distences can mbe accurately measured. d. The postion can me repeated without much deviation. e. This could effect the experiment but not as much as the human factor of the trigger of the mouse button. confidence assessment: 3
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14:39:05 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. Use amore sophisticated timing device with lasers and a computer. b. Eliminate the human element by using a computer. c. Determine a hypothesis on the distance and rate of travel by repeating the experiment. d. Use a mechanical release to consitantly release and get rid of human element. e. Using a laser or apparatus to mark the end or finish of the ramp. To gauge the time and travel using a computer. confidence assessment: 3
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14:39:53 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 --> It will make less cycles per minute due to the larger distence of travel required to complete a cycle. confidence assessment: 3
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14:41:53 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 --> The object is at rest. confidence assessment: 3
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14:44:19 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 --> The motion of the pendulum as it approaches the y-axis will get closer to it due to the velocity or length of frequency of crossing the axis lessens. confidence assessment: 2
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14:46:41 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 --> 60cm is the distance between the two points confidence assessment: 2
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14:48:18 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 thought the distence would be double the ave. velocity. I was wrong I had 30cm for my first try. confidence assessment: 3
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