"CANDLE IN A BOX"

INTERACTIVE LAB EXERCISE

Analyze Data I: Mathematical Analysis:

20) Process the numerical data mathematically by calculating differences between consecutive
      temperature values to reveal changes in rates of increase or decrease in temperatures. These are
      called "first difference" values. Graph the newly calculated "first difference" values against the
      experimental time increments. This new graph should give additional insights about the experiment
      results. For simplicity in this analysis we have used data from only two probes, Probes 3 & 4,
      graphed first as temperature over time. See Fig. e. Then we created a "first difference" graph using
      values from Probes 3 and 4.  See Fig. f.

Fig. e. Temperature data from two probes, 3 & 4, plotted against time.
 
 

    Fig. f. "First difference" values based on differences in temperature data
    from two probes, 3 & 4, plotted against time.

21) Repeat the calculations of differences using the "first difference" values created in number 21 and graph the newly-calculated "second difference" values for additional information about the
          results.  See Fig. g.

    Fig. g. "Second difference" values based on differences in "first
    difference" values for Probes 3 & 4 plotted against time.

    22) Analyze results again by comparing the three different 2D graphs.

 

Click here for more detailed Explanation of Analyze Data I.

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Last Update: 18 May, 1999