HP Prime Graphing Wireless Calculator Uživatelský manuál Strana 538

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24 Units and constants
Units
A unit of measurement—such as inch, ohm, or Becquerel—enables you to give a precise magnitude to a
physical quantity.
You can attach a unit of measurement to any number or numerical result. A numerical value with units
attached is referred to as a measurement. You can operate on measurements just as you do on numbers
without attached units. The units are kept with the numbers in subsequent operations.
The units are on the Units menu. Press (Units) and, if necessary, tap .
The menu is organized by category. Each category is listed at the left, with the units in the selected category
listed at the right.
Unit categories
length
area
volume
time
speed
mass
acceleration
force
energy
power
pressure
490 Chapter 24 Units and constants
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