User Guide

For information on changing the default system of units, for example, from
SI to foot-pound-second, see Changing the Current System of Units (page 103).
Value and Units
If performing computations with units, you can access the value and units
for a ScientificConstants object by specifying the units option when con-
structing the object, and then evaluating the object.
>
>
Uncertainty
The value of a constant is often determined by direct measurement or derived
from measured values. Hence, it has an associated uncertainty. To obtain
the uncertainty in the value of a ScientificConstants object, use the GetError
command.
>
>
110 • 3 Performing Computations