The paper initially had graphs pertaining to the experiment which where created in excell. I guess this posses a problem. All other information should be present.
Excel graphs are fine, but even if they are present you need to describe what you see in the graphs. It is possible to make a perfectly good graph using Excel, but not to see what it is telling you, which is the reason I need to see descriptions.
Of course I do ask you to submit your word-processed document via email, and will often view it.
You show good insight in your writeup, which is overall well-done.
Video Experiment #2 – Temperature Probe
Time (s) Temp (F) – Large Probe Temp (F) – Small Probe
0 8.8 38.3
30 11.2 44.8
60 14.0 48.8
90 16.9 52.9
120 19.6 55.6
150 21.8 58.0
180 23.8 59.9
210 25.7 61.4
240 27.5 62.8
270 29.7 64.1
300 31.1 65.0
330 32.9 65.7
360 34.0 65.9
390 35.5 66.4
420 36.9 66.8
1. First Halfway Time: [(75-38.3) /2] + 38.3 = Occurs at 56.6 F
Time required to reach 56.6 F is 130 s (from graph)
Second Halfway Time: [(75-56.6) /2] + 56.6 = Occurs at 65.8 F
Time required to reach 65.8 F is 170 s (from graph)
Third Halfway Time: Cannot be determined due to lack of data.
Additional Halfway Time: [(75-20.0) /2] + 20 = Occurs at 47.5 F
Time required to reach 47.5 F is 60 s (from graph)
Halflife: (130 + 170 + 60)/3 = 120 s
2. First 25% Approach: (75-8.8)(.25) + 8.8 = Occurs At 25.4 F
Time required to reach 25.4 F is 195 s (from graph)
Second 25% Approach: (75-25.4)(.25) + 25.4 = 37.8 F
Time required to reach 37.8 F is 225 s (from graph)
Halfway Approach: (75-8.8)(.50) + 8.8 = Occurs At 41.9 F
Time required to reach is greater than 420 s.
The halfway time is not equal to the sum of the two 25% approach times because it is not a linear function. (Time is not proportional to temperature.)
3.
Time (s) Temp (F) – Large Probe Temp (F) – Small Probe
0 8.8 38.3
30 11.8 44.1
60 14.8 49.0
90 17.5 53.2
120 20.2 56.6
150 22.7 59.6
180 25.1 62.0
210 27.4 64.1
240 29.6 65.8
270 31.7 67.3
300 33.7 68.5
330 35.6 69.5
360 37.4 70.4
390 39.2 71.1
420 40.8 71.8
The results are skewed slightly due to the lack of accuracy in the halflife values.
4a. The time in which the two probes are most different occurs at approximately 180 seconds.
4b. The probes appear to be changing at the same rate between 150 and 200 seconds.
5a.
5b. The time in which the two probes are most different occurs at approximately 200 seconds.
5c. The probes appear to be changing at the same rate between 150 and 200 secon