Your work on discussion form 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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TIMER program ___ what is the
• Based on the posted data, what is the minimum difference can occur between two
intervals, as observed by the program?
The minimum difference can occur between two intervals is 0.00000001 sec.
• Can you list all possible intervals between .12 sec and .19 sec, or provide the rule that would show how to list these intervals?
0.125
0.13281
0.14063
0.14844
0.15234
0.15625
0.1565
0.16016
0.16406
0.16797
0.17188
0.17969
0.18359
0.185
0.1875
The best way to create this list of numbers is using the EXCEL program. I copied the data from the site, pasted it into the EXCEL program, used the button “Sort Ascending”, so I could easily chose the numbers I needed, and then I chose the numbers which are more than 0.12 and less than 0.19.
No two clock times separated by 0.00000001 sec. were observed in any of these data.
The smallest separation in this reported data is .00025 seconds, between .15625 s and .1565 s.
Was any smaller separation reported by any of the students in the data set for this experiment?
Your work on discussion form 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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Pearl Pendulum Amplitude Depen
What is the evidence for or against the hypothesis that the
period of the Pearl Pendulum depends only on the length of the pendulum, not on
the amplitude of its motion?
The period of the Pearl Pendulum depends on the amplitude of its motion. There is an evidence to this statement: from the results of the experiment I’ve made, I can see that the rhythm of the Pendulum depends from the slope of the bracket. The rhythm got faster and faster by the end of the sounds when the pendulum was tilted 'back’. The sounds got further apart and the rhythm got slower when the pendulum was tilted 'forward'.
When I used TIMER to measure the time intervals between strokes, I noticed that in the case, when the bracket was titled forward, the pearl struck the bracket with larger time intervals and less number of hits (about 7-8 hits). In the case, when the bracket was titled back, the pearl struck the bracket more frequently and more number of strokes (about 10-11 strokes) and time intervals were smaller between each hit.
You have explained your reasoning very well.
You should also have received a posting a few days ago asking for your review and critique of other students' work on this experiment. It will be interesting for you to compare your conclusions with theirs, and I'll look forward to getting your reviews.
I will include one review received today, which seems to address some of the same things you discuss above, but with a different conclusion. I'm completely neutral at this point, merely presenting two interpretations without any indication of which (if either) I would agree with.
The other review:
I think that the observations recorded when the pendulum was level indicated the pendulum's period. The observations when the pendulum was on a slope indicated intervals that were greater or less than a full swing. I agree that the time between hits will vary based on the slope of the surface the pendulum rests on, but I don't think that's an indication of the period of the pendulum unless we measure the angle and calculate the percentage of a period that the pearl is swinging for. Looking at the observations from the level swings only, it does appear that the period of the pendulum is dependent only on its length