timer program

Phy 232

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 **

The far left column gives the interval number starting at 1. The middle column gives the beginning time of the interval and the right column tells how long the interval ran for.

** #$&*Your TIMER data from 20 fast clicks **

1 20.98438 20.98438

2 21.14063 .15625

3 21.27734 .1367188

4 21.41016 .1328125

5 21.54297 .1328125

6 21.67578 .1328125

7 21.80859 .1328125

8 21.94531 .1367188

9 22.07813 .1328125

10 22.19922 .1210938

11 22.32031 .1210938

12 22.45313 .1328125

13 22.59766 .1445313

14 22.74609 .1484375

15 22.87891 .1328125

16 23.01172 .1328125

17 23.13281 .1210938

18 23.26563 .1328125

19 23.39063 .125

20 23.51172 .1210938

21 23.64453 .1328125

22 23.78906 .1445313

** #$&*Your average time interval for 20 time intervals **

.1208984

I added the first 20 intervals and divided by 20.

Good.

You could also have subtracted clock times and divided by 20.

** #$&*Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **

.1210938, 4

.125, 1

.1328125, 10

.1367188, 2

.1445313, 1

.1484375, 1

.15625, 1

** #$&*Your general comment to this point **

** #$&*Why did you observe only certain time intervals? **

The timer program is not flawed or useless. It just appears that within certain time ranges there are certain times that the program reports.

** #$&*What did you see when you looked at the differences between time successive time intervals? **

Many of the numbers in the last column are the same. This says that the timer program is not accurate to the number of significant figures that it displays.

GOod.

In fact the times are all multiples of 1/64 second.

** #$&*Your time intervals for 7 complete breaths: **

9.507813

10.22656

10.94141

8.910156

10.26172

10.96484

6.945313

10.18359

10.64844

7.355469

** #$&*Your general comment to this point: **

** #$&*Why did you rarely, if ever, observe that same time interval twice? **

This most likely occurred because as the length of the time intervals increase, one decreases the likelihood of clicking at an interval close to another interval.

** #$&*Do you think this program is accurate to .1 or .01 ... **

I believe that the answer is B because as shown by the differences between the times intervals, past the second decimal point all of the differences are essentially the same which is humanly impossible to do.

** #$&*Copy of a few lines of your spreadsheet from the TIMER program. **

Breathing Data

event number clock time time interval

1 30.77344 30.77344

2 40.28125 9.507813

3 50.50781 10.22656

4 61.44922 10.94141

5 70.35938 8.910156

6 80.62109 10.26172

** **

30 minutes

** **

&#Your work looks good. See my notes. Let me know if you have any questions. &#