List of pre-defined constants and units, Defaults for si and eng/ us, Constants – Texas Instruments PLUS TI-89 User Manual
Page 106: Length, Area
Chapter 4: Constants and Measurement Units 89
04UNITS DOC TI-89/92Plus: Constants and Measurement Units (English) Susan Gullord Revised: 02/23/01 10:54 AM Printed: 02/23/01 2:12 PM Page 89 of 12
The
SI
and
ENG/US
systems of measurement use built-in default
units. In this section, the built-in defaults are indicated by
(SI)
and
(ENG/US)
. In some categories, both systems use the same default.
For a description of the
NONE
default, refer to page 87. Notice that
some categories do not have default units.
_c ............ speed of light ....................... 2.99792458
E
8_m/_s
_Cc.......... coulomb constant ............... 8.9875517873682
E
9_Nø_m
2
/_coul
2
_g ............ acceleration of gravity........ 9.80665_m/_s
2
_Gc ......... gravitational constant......... 6.67259
E
ë 11_m
3
/_kg/_s
2
_h ............ Planck’s constant ................ 6.6260755
E
ë 34_Jø_s
_k ............ Boltzmann’s constant ......... 1.380658
E
ë 23_J/_
°
K
_Me ......... electron rest mass............... 9.1093897
E
ë 31_kg
_Mn......... neutron rest mass ............... 1.6749286
E
ë 27_kg
_Mp......... proton rest mass ................. 1.6726231
E
ë 27_kg
_Na ......... Avogadro’s number............. 6.0221367
E
23 /_mol
_q ............ electron charge.................... 1.60217733
E
ë 19_coul
_Rb ......... Bohr radius .......................... 5.29177249
E
ë 11_m
_Rc.......... molar gas constant.............. 8.31451_J/_mol/_
¡K
_Rdb ....... Rydberg constant ................ 10973731.53413 /_m
_Vm......... molar volume....................... 2.241409
E
ë 2_m
3
/_mol
_
H0........... permittivity of a vacuum......8.8541878176204
E
ë 12_F/_m
_
s ............ Stefan-Boltzmann constant ..5.6705119
E
ë 8_W/_m
2
/_
¡K
4
_
f0 .......... magnetic flux quantum.......2.0678346161
E
ë 15_Wb
_
m0 .......... permeability of a vacuum ....1.2566370614359
E
ë 6_N/_A
2
_
mb.......... Bohr magneton.................... 9.2740154
E
ë 24_Jø_m
2
/_Wb
_Ang ....... angstrom
_au .......... astronomical unit
_cm ......... centimeter
_fath ....... fathom
_fm.......... fermi
_ft............ foot
(ENG/US)
_in ........... inch
_km......... kilometer
_ltyr ........ light year
_m ........... meter
(SI)
_mi .......... mile
_mil ......... 1/1000 inch
_mm........ millimeter
_Nmi ....... nautical mile
_pc .......... parsec
_rod......... rod
_yd .......... yard
_
m ............micron
_
A
¡ ............angstrom
_acre....... acre
_ha .......... hectare
NONE
(SI) (ENG/US)
List of Pre-Defined Constants and Units
This section lists the pre-defined constants and units by
category. You can select any of these from the
UNITS
dialog
box. If you use
3
to set default units, note that categories
with only one defined unit are not listed.
Defaults for SI and
ENG/US
Constants
Note: The TI
-
89 / TI
-
92 Plus
simplifies unit expressions
and displays results
according to your default
units. Therefore, constant
values displayed on your
screen may appear different
from the values in this table.
Tip: For Greek characters,
refer to Shortcut Keys
(inside front and back
covers).
Length
Area