Hp 48g Graphing Calculator Manual do Utilizador descarregar pdf (Página 121)

100

101

A left-shifted menu key converts the unit object in the command

line or level i to the corresponding unit.

A right-shifted menu key divides by the corresponding unit. This

helps you create unit expressions with units in the denominator.

Creating a Unit Object

The UNITS Catalog menu provides a simple method for creating a

unit object.

To create a unit object on the stack:

1. Key in the number part of the unit object.

2. Press (r^fUNITS~l and select the appropriate subject menu.

3. Press the menu key for the unit you want. (If you want the inverse

of the unit, press and the menu key.)

4. For compound units, repeat, steps 2 and 3 for eacli individual unit

in the unit expression.

When you press a menu key in the UNITS Catalog menu, the HP 48

first enters a corresponding unit, object on the stack with the number

value 1. Then, for an unshifted key, it executes * (multiply), or, for a

right-shifted key, it executes .■ ■ ■ ' (divide).

To create a unit object in the command line:

1. Key in the mmiber.

2. Key in the _ character (press fr»~)fT)). This activates

Algebraic-entry mode.

3. Key in the unit expression as you would an algebraic expression:

■ To key in a unit name, either press the corresponding menu key

or spell the unit name.

required.

Note that unit names are case-sensitive. For example, Hz (hertz)

must be typed with uppercase H and lowercase z. (For legibility,

all letters in menu keys are uppercase. Don’t confuse the menu-key

representation of a unit with its proper name.)

Unit Objects 10-3

1 2 ... 116 117 118 119 120 121 122 123 124 125 126 ... 611 612

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