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PHY 121
Your 'cq_1_01.2' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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cq_1_012
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PHY 121
Your 'cq_1_01.2' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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The problem:
Answer the following:
How accurately do you think you can measure the time between two events using the TIMER program?
answer/question/discussion: ->->->->->->->->->->->-> n: ->->->->->->->->->->->-> n (start in the next line):
The timer program is fairly accurate but not precise enough for minute changes in time.
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I believe I can measure the time between two events to within .1 seconds. I believe that any time period less than this would be difficult to measure accurately since there would be some difference in time between when the event occured and when I could click the timer button. I believe one-tenth of a second is probably fairly accurate to how quickly I could click after an event occured.
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What is the shortest time interval you think you would be able to measure with reasonable accuracy?
answer/question/discussion: ->->->->->->->->->->->-> n: ->->->->->->->->->->->-> n (start in the next line):
After clicking as fast as I could for about 50 time intervals, .046875 was the shortest interval I could measure.
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How does the percent error in timing intervals change as the time between the events gets smaller?
answer/question/discussion: ->->->->->->->->->->->-> n: ->->->->->->->->->->->-> n (start in the next line):
The percentage gets larger as the resolution of the timer doesn't allow for as precise of a measurment
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For smaller time intervals, I believe both the human error aspect and the timer's precision would both cause the percentage error to increase. For small time intervals, I don't believe I would have the ability to click consistenly at the precise time of an event the closer the events are together. At a certain point, the timer would also be too imprecise to measure the time interval accurately.
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How accurately are you able to measure the positions of the ball and the pendulum in the initial video?
answer/question/discussion: ->->->->->->->->->->->-> n: ->->->->->->->->->->->-> n (start in the next line):
I believe I could measure them fairly accurately, but with objects sometimes obstructing the view it is impossible to be exact.
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I believe all measurements are probably accurate to within 1/2inch. Slowing down the speed of the video playback allows for a fairly accurate measurement. However, objects obstructing the view at certain points in the video would not allow for measurements to be exact and would force me to estimate.
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&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your old and new solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified.
If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#
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PHY 121
Your 'formatting guidelines and conventions' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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1/27/12 9:30 AM
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Follow the instructions, fill in your data and the results of your analysis in the given format.
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Copy the document into a text editor (e.g., Notepad; but NOT into a word processor or html editor, e.g., NOT into Word or FrontPage).
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You should have a permanent notebook dedicated to the lab portion of this course. You should keep a record of the lab work you do, including free-hand sketches of apparatus and reasonably accurate but not meticulous hand-sketched graphs (you will likely use the computer to make meticulous graphs, but in the hand-sketching process you think about important aspects of the graph that don't necessarily become apparent if you use a machine to do the sketching).
Some of your data will be taken by a computer or with the aid of a computer, and you will not be expected to write down the hundreds or thousands of data points involved in that process, but you should keep a small sample indicative of the results you obtain, and preliminary observations on trends and other aspects of your data which might be relevant to what you are observing.
You should also keep a record of where your data files are located, and you should maintain a secure backup of all your data files. If you lose your data, you might end up having to repeat your experiment.
You might at any point in the course be asked to reproduce information from your lab work. You lab notebook will be the key to being able to do so.
Indicate below, in your own words, the importance of maintaining a good lab notebook.
I must keep thorough records of all lab work and a dedicated notebook with all relevant materials. Computer files should be organized and backed up frequently.
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&#Very good work. Let me know if you have questions. &#