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PHY 231
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: ->->->->->->->->->->->-> (start in the next line):
My estimation would be just under half a second accounting for all human error (trigger + reaction time), object placement, and TIMER program. The program itself is accurate to the .01 I believe.
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• What is the shortest time interval you think you would be able to measure with reasonable accuracy?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
This is all based on the acceptance of ‘reasonable accuracy’. From my statistics background I would venture to say 2 standard deviations (95%) would be considered reasonably accurate. In physics I’m sure it all depends on the importance of the project.
At 95 percent using the .5 second uncertainty above…
.5s/x = .05 error
x= 10 seconds
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• How does the percent error in timing intervals change as the time between the events gets smaller?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
The percentage error gets larger and larger as the intervals get smaller because the error is a larger part of the overall interval.
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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: ->->->->->->->->->->->-> (start in the next line):
I believe this is a reference to the tape and microphone pendulum video. If so, I believe the uncertainty to be between ½ inch and an inch. Also we noted in that experiment we could see the TIMER changing when pausing mid frame giving us a certainty of only the .01 digit. The Uncertainty of .5 to 1 inch comes from the blur we saw on the video due to shutter speed I believe it was.
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&#Very good responses. Let me know if you have questions. &#