PHY 201
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 **
It appears as soon as I open the program the timer begins counting from zero. Each time I click click to time event it logs the time since I opened the program, then to the right it logs the time since the last time I clicked click to time event. Each entry/log is also numbered down the window. I can click initialize counter to clear the data in the window, but it will not restart the time since I opened the program. I have to close the program for this to happen. I'm not sure yet what the file data button does.
** Your TIMER data from 20 fast clicks **
1 6.507813 6.507813
2 6.65625 .1484375
3 6.804688 .1484375
4 6.929688 .125
5 7.078125 .1484375
6 7.210938 .1328125
7 7.359375 .1484375
8 7.507813 .1484375
9 7.625 .1171875
10 7.757813 .1328125
11 7.882813 .125
12 8.015625 .1328125
13 8.148438 .1328125
14 8.257813 .109375
15 8.398438 .140625
16 8.523438 .125
17 8.65625 .1328125
18 8.789063 .1328125
19 8.921875 .1328125
20 9.054688 .1328125
21 9.164063 .109375
** Your average time interval for 20 time intervals **
The number in the middle column represents the total time in seconds since I opened the program. The first number beside 1 represents the time I began clicking. From click 1 to 2 is my fist interval. The number beside 21 represents the total amount of time since I opened the program, so if I take the number beside 1 and subtract it from the number beside 21 I have the total amount of time the 20 clicks took. Then all I have to do is divide that by 20 and I would get my average time.
9.164063-6.507813=2.656250 seconds
2.656250/20 = .1328125 seconds per average click
** Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
.109375, 2
.1171875, 1
.125, 3
.1328125, 8
.140625, 1
.1484375, 5
** Your general comment to this point **
** Why did you observe only certain time intervals? **
No. Time is continuous and can never be exactly measured because you can always go to one more decimal place to be that much more accurate as to what the time actually is. This program is as accurate as it has been programed to be. The only reason I got 8 times that were exactly the same is because I clicked within a certain, narrow window of time 8 times that displays .1328125 seconds even though it's not exactly that time each time.
** What did you see when you looked at the differences between time successive time intervals? **
This tells the difference between the two times clicked. It's sort of a variance. The numbers tell us that no two clicks were the same time twice in a row, or that last column number would be 0.
** Your time intervals for 7 complete breaths: **
6.679688
8.03125
6.882813
7.40625
6.898438
8.898438
7.695313
7.007813
6.679688
7.1875
** Your general comment to this point: **
That just about made me go to sleep too.
** Why did you rarely, if ever, observe that same time interval twice? **
Because when we clicked as fast as we could we had more control in a sense over the time interval. Plus the intervals were much shorter. When breathing, the intervals were longer and we really had no idea how long it had been between each breath.
** Do you think this program is accurate to .1 or .01 ... **
I would say within about .01 seconds. I arrived at this because when we clicked as fast as possible, the times differed by .01. That is, most of the times recorded repeated themselves past the hundredth mark. For example, there was only one time that began with .11 and only one time that began with .12
** Copy of a few lines of your spreadsheet from the TIMER program. **
Breath intervals
event number clock time time interval
1 1249.938 1249.938
2 1256.617 6.679688
3 1264.648 8.03125
4 1271.531 6.882813
** **
40 minutes.
** **
&#Your work looks very good. Let me know if you have any questions. &#