Phy 201
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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):
You can measure the time within +/- .002 of a second. This is because the program gives the time up to 3 decimal places. The rule that I have learned is that your uncertainty should have the same decimal places as the number provided.
The program gives 3 decimal places, but that doesn't mean it actually distinguished time intervals to that level of certainty. If only certain intervals were repeatedly indicated during the TIMER exercise, as appears to be the case with most but not all students, it almost certainly means that the program is failing to distinguish times that accurately.
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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):
You would probably be able to measure a hundredth of a second accurately. When you get into the thousandths place, the time is very short and hard to make very accurate.
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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 percent error between the numbers gets larger as the intervals get smaller. This is because you use the measured value divided by the accepted value. Then you divide by the accepted value. Since the interval is very small, the accepted value is also very small and you end up dividing by a very small number, which makes the answer bigger.
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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):
When you pause the video you can find the position of the object to about half an inch. This is because when the picture is paused it is a little blurry and hard to tell the actual value. However, the numbers on the measuring tape are large enough to get with in .5 of an inch.
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30 minutes
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6/6 3:45
&#Good responses. Let me know if you have questions. &#
&#See any notes I might have inserted into your document. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your solutions with the expanded discussion at the link
Solution
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