Phy 121
Your 'timer program' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Your General Comment **
** Describe what you see on your first 10 clicks **
I see a list of numbers 1 through 10 with various numbers next to them, ranging from 51.71875 to 58.26563. Next to those numbers, I believe, is the difference between the numbers in the preceding column.
** Your TIMER data from 20 fast clicks **
1 3.3125 3.3125
2 3.484375 .171875
3 3.65625 .171875
4 3.84375 .1875
5 4.03125 .1875
6 4.1875 .15625
7 4.375 .1875
8 4.546875 .171875
9 4.71875 .171875
10 4.875 .15625
11 5.046875 .171875
12 5.203125 .15625
13 5.375 .171875
14 5.546875 .171875
15 5.703125 .15625
16 5.875 .171875
17 6.046875 .171875
18 6.21875 .171875
19 6.421875 .203125
20 6.625 .203125
** Your average time interval for 20 time intervals **
Average: 0.177083
I got this number by entering my data in the Excel program and averaging it there.
** Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
0.15625, 4
0.171875, 10
0.1875, 3
0.203125, 4
** Your general comment to this point **
** Why did you observe only certain time intervals? **
I think that the TIMER program reported that time so frequently because it rounds as opposed to reporting 100% accurate numbers. This does not mean that the program is flawed or useless because there is always a certain amount of error involved with calculations, regardless of the method used to calculate.
** What did you see when you looked at the differences between time successive time intervals? **
I think this shows that the TIMER shows time interval differences up to 1/100,000 of a second.
** Your time intervals for 7 complete breaths: **
.953125
5.321875
5.5625
5.484375
5.265625
5.78125
6.078125
6.171875
7.203125
6.640625
** Your general comment to this point: **
** Why did you rarely, if ever, observe that same time interval twice? **
This is what we would expect because the time intervals are greater than they were when completing the fast clicks.
** Do you think this program is accurate to .1 or .01 ... **
d. The TIMER program is capable of determining the time between two events accurately to within about .0001 second. This makes sense based on the data we collected which read out to the .0001 place.
** Copy of a few lines of your spreadsheet from the TIMER program. **
I could not save my data. When I reached step 3 and attempted to save in the Save As window, the File Name and Save as type boxes were empty and would not fill when I typed. I then received a Run-time Error 76 message.
It won't generally be necessary to save your data, since you can always copy-and-paste it.
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25 minutes
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&#Your work looks good. See my notes. Let me know if you have any questions. &#