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X p l o r e r G L X U s e r s ’ G u i d e
119
5.
Create a calculation for ln(r/r
0
)
a)
Press
to return to the Home Screen; press
to open the Calcu-
lator.
b)
On a blank line, enter:
ln(r/r0)
c)
To insert the ln() function, press
to open the Functions menu, use
the arrow keys to highlight ln(), and press
.
d)
The Calculator will prompt you on the next line to enter the value of r
0
.
Type the initial relative temperature and press
.
6.
Make a graph of ln(r/r
0
) versus t.
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 ln(r/r0).
7.
Apply a linear fit and find the value of k.
a)
Press
to open the Tools menu; press
to select Linear Fit.
b)
Press the down arrow key to make the dashed box surround the entire
data set.
c)
The slope of the best-fit line equals k.
k = _________________ (include units)
Now that you have experimental values for the constants r
0
and k, you can substi-
tute them into Equation 2 and compare that model to the collected data.
8.
Enter Equation 2 into the Calculator using your experimental values of
r
0
and k.
a)
Press
to return to the Home Screen; press
to open the Calcu-
lator.
b)
On a blank line, enter:
r model = r0 * e^(-k*t)
Enter this calculation
Calculator will prompt
you for value
F3
F1
F1
F1
F4
7
?!
Press to make the dashed
box surround the entire data set
F3
5
jkl
Enter this calculation
Enter experimental value for k
Do
not
enter a value for t
F3
Summary of Contents for Xplorer GLX
Page 4: ......
Page 6: ......
Page 7: ...Part 1 Users Guide...
Page 8: ......
Page 18: ...12 O v e r v i e w o f t h e G L X...
Page 94: ...88 S e t t i n g s S c r e e n...
Page 98: ...92 P r i n t i n g...
Page 104: ...98 O p e r a t i n g T e m p e r a t u r e...
Page 112: ......
Page 116: ...110 C a l o r i m e t r y...
Page 132: ...126 V o l t a g e v e r s u s R e s i s t a n c e...
Page 136: ...130 I n d u c e d E l e c t r o m o t i v e F o r c e...
Page 146: ...140 B e a t F r e q u e n c y...
Page 150: ......
Page 152: ......