WP WP-34S User Manual


Edition 2.2
Page 78 of 103
Constants
Below you find the contents of the catalog CONST. Navigation works as in the catalogs
mentioned before. Names of astronomical and mathematical constants are printed on
colored background below. Values of physical constants (incl. their relative standard
deviations given in parentheses below) are from CODATA 2010, copied in July 2011,
unless stated otherwise explicitly. Green background denotes exact or almost exact val-
ues. The more the color turns to red, the less precise the respective constant is
known
27
.
For the units, remember Tesla with
22
111
m
sV
m
Wb
T


, Joule with
2
2
111
s
mkg
mNJ


and on the other hand
TeVeV
e
sAVsWJ
6
1024.6
1
111 
. Thus
2
11 mA
T
J

.
Name
Numeric value
Unit
Remarks
a
365.2425 (per definition)
d
Gregorian year
a
0
5.2917721092E-11 (3.2E-10)
m
Bohr radius



R 

4
a
m
384.4E6 (1E-3)
m
Semi-     orbit around
the Earth
a
1.495979E11 (1E-6)
m
Semi-
sun. Within the uncertainty stated here, it
equals 1 AU.
c
2.99792458E8 (per definition)
s
m
Vacuum speed of light
c
1
3.74177153E-16 (4.4E-8)
Wm 
2
First radiation constant
2
2 ch 
c
2
0.014387770 (9.1E-7)
Km
Second radiation constant
k
hc

e
1.602176565E-19 (2.2E-8)
C
Electron charge
00
2
G
RK
KJ

eE

1
e represents
the electron charge elsewhere in this table.
F
96485.3365 (2.2E-8)
mol
C
= e N
A
F
2.5029078750958928...
1

F
4.6692016091029906...
1

g
9.80665 (per definition)
2
s
m
Standard earth acceleration
27
The bracketed values printed here for your kind attention allow you to compute the precision of results
you may obtain using these constants. The procedure to be employed is called error propagation. It is
often ignored, though essential for trustworthy results  not only in science. Please turn to respective
texts before you believe in 4 decimals of a calculation result based on yardstick measurements.

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