Casio fx-991ES PLUS User Manual

7
13
Scientific Constants
Your calculator comes with 40 built-in scientific constants that can be used
in any mode besides BASE-N.
Each scientific constant is displayed as a unique symbol (such as π),
which can be used inside of calculations.
To input a scientific constant into a calculation, press
(CONST)
and then input the two-digit number that corresponds to the constant you
want.
Example 1: To input the scientific constant C
0
(speed of light in a
vacuum), and display its value
(CONST)
(C
0
)
Example 2: To calculate C
0
=
1
√ε
0
μ
0
(MthIO-MathO)
1 (CONST) (ε
0
)
(CONST) (μ
0
)
The following shows the two-digit numbers for each of the scientific
constants.
01: (mp) proton mass 02: (mn) neutron mass
03: (me) electron mass
04: (mμ) muon mass
05: (a
0
) Bohr radius 06: (h) Planck constant
41

Casio fx-991ES PLUS Specifications

General

Type	Scientific
Cover	No
Form factor	Desktop
Control type	Buttons
Product color	Gray
Digits	15 digits
Display type	Dot-matrix
Display resolution	96 x 31 pixels
Display number of lines	10 lines
Storage media type	Not available
Battery life	3 year(s)
Battery type	LR44
Power source	Battery/Solar
Number of batteries supported	1
Symbolic notation	Square root
Conversion between	Decimal, Fraction, Percent
Convert angles from degrees to	Gradian, Radian
Random number/integer generator	Yes

Weight and Dimensions

Depth	162 mm
Width	80 mm
Height	11.1 mm
Weight	95 g