Casio CLASSWIZ CG Software User's Manual page 187

• An error (Math ERROR) occurs if you input a mathematically incorrect expression while editing a constant.
• To cancel the editing operation, press b here.
4. To save an edited value, press O.
* Instead of performing this operation, you can also press a number key to start editing.
To initialize a single physical constant value
1. Perform the first three steps of the procedure under
(page 186) to highlight the physical constant whose value you want to initialize.
2. Select T > [Initialize] > [Selected Constant].
To initialize all physical constant values
1. While the physical constant list screen is displayed, select T > [Initialize] > [All].
2. In response to the confirmation dialog that appears, select [OK].
Using a Physical Constant in a Calculation
The physical constant values can be stored to alpha variables for use in calculations by Calculate and other
apps.
Example: To calculate the time required for light to reach the Earth from the Sun. This calculation uses the
average distance from the Sun to the Earth (1 au = 149,597,870,700 m) and the speed of light in
vacuum (c = 299792458 m/s), which is the calculator's default value.
1. In the Physical Constants category list, select [Universal] and then press O.
2. Highlight [c] (speed of light in vacuum) and then select T > [Store
Const. as Variable].
• This displays a dialog for specifying the alpha variable
storage destination.
3. Input one letter from A to Z and then press O.
• Here, press j C O, which stores the value to alpha variable C.
4. Select h > Calculate to start up the Calculate app.
5. Execute the calculation.
• The calculation result shows it takes approximately 499 seconds for light to reach the Earth from the Sun.
• For details about alpha variables, see
Using My Drawer
You can use My Drawer to store often-used physical constants.
To save a physical constant to My Drawer
1. Perform the first three steps of the procedure under
(page 186) to highlight the physical constant you want to store in My Drawer.
2. Select T > [Store in My Drawer].
"Displaying a Physical Constant and Its Information"
149597870700*Pj(C)E
"Using Alpha Variables" (page
"Displaying a Physical Constant and Its Information"
187
18).