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): **
** Is flow rate increasing, decreasing, etc.? **
decrease
** Is the velocity of the water surface increasing, decreasing, etc.? **
increase
** 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? **
You would take the final displacement of water surface minus the initial displacement of the water divided by the time, in which the time would also depend on the diamter of the cylinder and the whole because if larger, water will com out faster, if hole is smaller water will come out slower.
** Explain how we know that a change in velocity implies the action of a force: **
Change in velocity implies action of a force because velocity depends on who fast or slow an object goes through an area depending upon the force applied.
** Does the depth seem to be changing at a regular rate, at a faster and faster rate, or at a slower and slower rate **
changing at a regular rate
** What do you think a graph of depth vs. time would look like? **
as time increases, depth of water decreases
** 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? **
decrease
** Does this distance change at an increasing, decreasing or steady rate? **
decreasing
** What do you think a graph of this horizontal distance vs. time would look like? **
as time increases the horizontal distance changes.
** The contents of TIMER program as you submitted them: **
0.00
2.03
2.80
3.90
4.94
5.88
7.74
9.23
11.59
12.96
16.31
24.88
30.92
** The vertical positions of the large marks as you reported them, relative to the center of the outflow hole **
1.6cm
2.0cm
3.4cm
6.0cm
8.4cm
10.7cm
13.2cm
15.4cm
17.6cm
19.8cm
22.1cm
24.3cm
26.8cm
** Your table for depth (in cm) vs clock time (in seconds) **
0.00s, 0cm
2.03s, 24.3cm
2.80s, 22.1cm
3.90s, 19.8cm
4.94s, 17.6cm
5.88s, 15.4cm
7.74s, 13.2cm
9.23s, 10.7cm
11.59s, 8.4cm
12.96s, 6.0cm
16.31, 3.4cm
24.88s, 2.0cm
30.92s, 1.6cm
** Is the depth changing at a regular rate, at a faster and faster rate, or at a slower and slower rate? **
depth is changing at a slower and slower rate as the water is running out
** Your description of your depth vs. t graph: **
water depth represents the y axis and clock time represents the x axis, as clock time increases, waterdepth decreases. The slope of the line is -2.8cm/sec
** Your explanation and list of average average velocities: **
0cm/s
13.2cm/s
3.24cm/s
2cm/s
-2.2cm/s
-2.3cm/s
-1.47cm/s
-1.06cm/s
-1.67cm/s
-.72cm/s
-.3cm/s
-.23cm/s
I used the formula average velocity= distance traveled/time elasped for each time interval.
** The midpoints of your time intervals and how you obtained them: **
2.03s, 13.4
2.80s, 12.15
3,90s, 11.05
4.94s, 9.9
5.88s, 8.8
7.74s, 7.7
9.23s, 6.6
11.59s, 5.35
12.96s, 4.2
16.31s, .3
24.88s, 1.7
30.92s, 1
I took half of the distance on each time interval.
** Your table of average velocity of water surface vs. clock time: **
13.2cm/s, 13.4
3.24cm/s, 12.15
2cm/s, 11.05
-2.2cm/s, 9.9
-2.3cm/s, 8.8
-1.47cm/s, 7.7
-1.06cm/s, 6.6
-1.67cm/s, 5.35
-.72cm/s, 4.2
-.3cm/s, 3
-.23cm/s, 1.7
** Your description of your graph of average velocity vs clock time: **
average velocity represents the y axis and clock time represents the x axis, my gragh is inconclusive at this time.
** Your explanation of how acceleration values were obtained: **
6.50 cm/s^2
-12.8cm/s^2
-1.13cm/s^2
-4.04cm/s^2
-.106cm/s^2
-.054cm/s^2
.48cm/s^2
1.41cm/s^2
.128cm/s^2
.048cm/s^2
.127cm/s^2
** Your acceleration vs clock time table: **
1.015s, 6.50 cm/s^2
1.4s ,-12.8cm/s^2
1.95s, -1.13cm/s^2
2.47s, -4.04cm/s^2
2.94s, -.106cm/s^2
3.87s, -.054cm/s^2
4.62s, .48cm/s^2
5.79s, 1.41cm/s^2
6.48s, .128cm/s^2
8.15s, .048cm/s^2
12.44s, .127cm/s^2
** According to the evidence here, is acceleration increasing, decreasing, staying the same or is in not possible to tell? **
inconclusive
decreasing
** **
2 hours
&#Your work looks good. Let me know if you have any questions. &#