PASCO Xplorer-GLX Users’ Guide - Manual (Page 126)

120 N e w t o n ’ s L a w o f C o o l i n g
c) To insert the function e^, press to open the Functions menu, use
the arrow keys to highlight e^, and press .
Also open the Functions menu to select and insert the pair of parenthe-
ses.
d) The Calculator will prompt you to enter the values of k and t. (It does
not prompt you for r
0
because you entered that constant in step 5.)
e) Enter the value of k that you found in step 7 and press .
f) Time is the variable that will be plotted on the horizontal axis, so do not
enter a value for t.
9. Compare collected relative temperature data with the modeled data.
a) Press to return to the Home Screen; press to open the Graph
display.
b) Press to open the Graphs menu; press to select New Graph
Page.
c) Press twice to highlight the data source menu. From the menu,
select r (the collected data).
d) Press to open the Graphs menu; press to select Two Measure-
ments mode.
e) Press to turn on the highlight, then press the left arrow key repeat-
edly until the second data source (on the right side of the Graph) is high-
lighted.
f) Press to open the data source menu and select r model.
10. Does the modeled equation agree with the collected data? If it deviates,
can you explain why?
F1
e^ parentheses
F1
F4 7 ?!
F4 4
ghi