
4. Select c: 299792458.
5.
Square the speed of light and evaluate the expression.
You can enter just the value of a constant or the constant and its units (if it has units). If is showing
on the screen, the value is inserted at the cursor point. If is showing on the screen, the value and its
units are inserted at the cursor point.
In the previous gure, the rst entry shows the Universal Gas Constant after it was chosen with
showing. The second entry shows the same constant, but chosen when was showing.
498 Chapter 24 Units and constants
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