Your 'flow experiment' 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 initial message (if any): **
2nd requested resubmission--recalculated calculations of accelerations.
** Is flow rate increasing, decreasing, etc.? **
** Is the velocity of the water surface increasing, decreasing, etc.? **
** How would the velocity of the water surface, the velocity of the exiting water, the diameter of the cylinder and the diameter of the hole be interrelated? **
** Explain how we know that a change in velocity implies the action of a force: **
** Does the depth seem to be changing at a regular rate, at a faster and faster rate, or at a slower and slower rate **
** What do you think a graph of depth vs. time would look like? **
** Does the horizontal distance (the distance to the right, ignoring the up and down distance) traveled by the stream increase or decrease as time goes on? **
** Does this distance change at an increasing, decreasing or steady rate? **
** What do you think a graph of this horizontal distance vs. time would look like? **
** The contents of TIMER program as you submitted them: **
** The vertical positions of the large marks as you reported them, relative to the center of the outflow hole **
** Your table for depth (in cm) vs clock time (in seconds) **
** Is the depth changing at a regular rate, at a faster and faster rate, or at a slower and slower rate? **
** Your description of your depth vs. t graph: **
** Your explanation and list of average average velocities: **
** The midpoints of your time intervals and how you obtained them: **
** Your table of average velocity of water surface vs. clock time: **
** Your description of your graph of average velocity vs clock time: **
** Your explanation of how acceleration values were obtained: **
-0.37 cm/sec^2
-0.22
0.06
-0.10
0.08
-0.03
-0.05
0.01
0.02
-0.04
0.02
-0.01
0.01
-0.06
0.04
-0.03
0.04
-0.04
0.00
0.03
-0.09
0.01
This was accomplished by delta v / delta t and getting average acceleration. I.E. First interval was 0.99 seconds (1.39 - 0.40) divided by difference in average velocity of -0.37 (0.61-0.98) which equals -0.37 cm/sec^2.
** Your acceleration vs clock time table: **
0.40 sec, -0.37 cm/sec^2
1.39, -0.22
2.21, 0.06
4.22, -0.10
5.70, 0.08
7.30, -0.03
8.74, -0.05
10.25, 0.01
11.97, 0.02
13.60,-0.04
15.17, 0.02
16.91,-0.01
18.73, 0.01
20.56,-0.06
22.52, 0.04
24.47,-0.03
26.41, 0.04
28.42,-0.04
30.59, 0.00
31.81, 0.03
35.41,-0.09
37.51, 0.01
** According to the evidence here, is acceleration increasing, decreasing, staying the same or is in not possible to tell? **
I think you're OK here but to be sure I really need to see your original data.
If you could insert the revisions in this document into a copy of the original, with your revisions indicated before and after by &&&&, I could check the results of your calculations.